JP2018175981A - Game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a game machine capable of suitably accelerating a circulating body in a configuration for circulating the circulating body by utilizing a stepping motor.SOLUTION: A hybrid stepping motor 33 includes: a rotor 91 disposed at the center; and a stator 90 including first to fourth poles 92-95 disposed around the rotor 91. The rotor 91 is composed of a forward rotor 91a polarized to an N pole, and a back-side rotor 91b polarized to an S pole, and is attached to a rotating shaft while being relatively shifted by 1/2 pitch such that gear teeth provided around the back-side rotor 91b are positioned between gear teeth provided around the forward rotor 91a. Excitation phases of respective poles 92-95 are changed successively, and hence the rotor 91 is rotated. In this case, for starting rotation of the stepping motor 33, an interval for switching the excitation phases is extended and shortened.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a gaming machine that performs variable display of patterns through the circulation of a circulating body.

  A slot machine, for example, is an example of a game machine that performs variable display of patterns through the circulation of a circulating body. The slot machine is provided with a plurality of reels having a plurality of symbols applied to the outer peripheral portion, and a part of the symbols applied to each reel can be viewed through the display unit. Then, the player inserts medals and operates the start lever to start rotation of each reel, and after the reels start rotation, the reels are sequentially stopped by operating the stop button. Further, inside the slot machine, a lottery is made on the condition of the insertion of the medal and the operation of the start lever, and the result of the lottery is a prize, and the symbol on which the player is won is stopped on the effective line set in advance. On the condition that the game is played, a predetermined number of medals are paid out, and a bonus such as the occurrence of a predetermined game advantageous to the player is given (see, for example, Patent Document 1).

  Further, as the above-mentioned gaming machine, besides the slot machine, a gaming machine which can perform the same game as the above-mentioned slot machine by using a game ball instead of a medal as a game medium can be mentioned. Another example is a pachinko machine that uses the above-mentioned orbiting body as a display unit for providing the player with an effect according to the result of the internal lottery.

  A stepping motor is generally used as a drive means for causing the above-mentioned orbiting body to orbit. In this case, when the circulation start condition is satisfied, the driving by the stepping motor is started, and the acceleration period is passed to shift to the constant speed period. Then, after the constant speed period is continued for a predetermined period, the constant speed period is stopped based on the satisfaction of the circulation stop condition.

JP 2003-180936 A

  Here, in a gaming machine such as that illustrated above, a configuration capable of suitably accelerating the orbiter is required, and there is still room for improvement in this respect.

  The present invention has been made in view of the above-described circumstances and the like, and provides a gaming machine capable of suitably accelerating the rotating body in a configuration in which the rotating body is rotated using a stepping motor. The purpose is to

In order to solve the above problems, the invention according to claim 1 is an orbiting body in which a plurality of types of patterns are provided in the circumferential direction;
Drive means for rotating the rotating body;
Drive control means for driving and controlling the drive means;
Equipped with
The driving means is a stepping motor having a stator and a rotor, wherein the excitation phase of the driving means is switched to rotate the rotor by rotating the rotor.
The drive control means
Initial drive control means for performing initial drive control of the drive means so as to start rotation of the orbiting body and achieve a predetermined rotational speed;
Constant speed drive control means for performing constant speed drive control of the drive means so that the predetermined rotational speed is maintained after execution of the initial drive control by the initial drive control means;
Equipped with
The initial drive control means
Long and short setting means for causing a period in which the switching interval of the excitation phase is longer and a period in which the switching interval of the excitation phase is shorter while the initial drive control is being performed;
Stage setting means for shortening the switching interval stepwise after drive control by the long and short setting means so that the rotational speed of the orbiting body becomes the predetermined rotational speed;
Equipped with
The switching interval finally set by the long / short setting unit is the longest switching interval among the switching intervals set during the period of the drive control by the long / short setting unit,
The long and short setting means is characterized in that the control for lengthening or shortening the switching interval is started from the start of the initial drive control.

  According to the present invention, in the configuration in which the rotating body is rotated using the stepping motor, it is possible to preferably accelerate the rotating body.

FIG. 16 is a front view of the slot machine in the embodiment. It is a perspective view of a slot machine showing the state where the front door was opened. It is an assembly perspective view of a left reel. It is an expanded view of the strip | belt-shaped belt which comprises each reel. It is an electric block diagram of a slot machine. It is a flowchart which shows timer interruption processing. It is a flowchart which shows normal processing. It is a flow chart which shows reel control processing. It is a schematic diagram which shows the operation principle of a stepping motor. (A) It is a connection diagram which shows the drive system of a stepping motor, (b) is a figure which shows the drive characteristic of a stepping motor. It is explanatory drawing which shows the relationship between excitation data and an excitation order pointer. It is an explanatory view for explaining an example of an excitation pattern in a conventional slot machine. It is an explanatory view for explaining an example of an excitation pattern in the slot machine. It is a figure for showing time change of the number of steps to one interruption, when an excitation pattern of Drawing 12 or Drawing 13 is applied. It is a flowchart which shows a reel rotation process. It is a flow chart which shows stepping motor control processing. It is a flow chart which shows motor control processing. It is a figure which shows the result at the time of measuring the vibration waveform in a constant speed state about the reel unit produced by Example 1 and Example 2. FIG. It is a figure which shows the result of having made the mark in the predetermined location of the left reel surface, and having measured the fluctuation amount of the position of the said mark accompanying execution of acceleration processing. It is a figure which expands and shows a part of FIG. FIG. 52 is an explanatory diagram for describing another example of the excitation pattern in the slot machine. (A) It is a figure which shows the result of having performed various evaluation about Example 1, (b) It is a figure which shows the result of performing various evaluation about Example 2. FIG.

  Hereinafter, an embodiment in the case where the present invention is applied to a slot machine which is a kind of gaming machine will be described in detail based on the drawings. FIG. 1 is a front view of the slot machine 10, and FIG. 2 is a perspective view of the slot machine 10 with the front door 12 opened.

  As shown in FIG. 2, the slot machine 10 is provided with a housing 11 forming an outer shell thereof. The housing 11 is formed in a box shape having an open front as a whole by fixing a plurality of wooden panels.

  A front door 12 is attached to the front side of the housing 11. The front door 12 is supported by the housing 11 so that the internal space of the housing 11 can be opened and closed with the left side portion as a pivot. The front door 12 is locked so as not to be opened by a locking device 13 provided on the back of the front door 12. The locked state is released by an unlocking operation of the key cylinder 14 with a predetermined key.

  As shown in FIG. 1, a game panel 20 for notifying the player of the game state is provided on the upper side of the central portion of the front door 12. In the game panel 20, three vertically long display window portions 21L, 21M, 21R are formed in a line. The display windows 21L, 21M, 21R are made of a transparent or semi-transparent material, and the inside of the slot machine 10 is visible through the display windows 21L, 21M, 21R.

  As shown in FIG. 2, the inside of the housing 11 is divided into upper and lower parts by a partition plate 30, and a reel unit 31 is attached to the top of the partition plate 30. The reel unit 31 includes a left reel 32L, a middle reel 32M, and a right reel 32R which are respectively formed in a cylindrical shape. Each of the reels 32L, 32M, 32R is rotatably supported such that the central axis thereof is the rotational axis of the reel. The rotational axes of the respective reels 32L, 32M, 32R are disposed on the same axis extending substantially in the horizontal direction, and the respective reels 32L, 32M, 32R are in one-to-one correspondence with the display windows 21L, 21M, 21R. There is. Therefore, a part of the surface of each of the reels 32L, 32M, 32R is visible through the corresponding display windows 21L, 21M, 21R. In addition, when the reels 32L, 32M, 32R rotate forward, the surface of the reels 32L, 32M, 32R is projected as if it were moving from the top to the bottom through the display windows 21L, 21M, 21R.

  Each of the reels 32L, 32M, 32R is connected to the stepping motor 33, and the reels 32L, 32M, 32R can be driven to rotate individually, that is, independently and independently, by driving the stepping motor 33. It has become. Since each of the reels 32L, 32M, 32R has the same configuration, the left reel 32L will be described as an example based on FIG. 3 here. FIG. 3 is an assembled perspective view of the left reel 32L.

  The left reel 32L includes a cylindrical frame member 41 forming a cylindrical cage, and a belt-like belt (not shown in FIG. 3) endlessly wound around the outer peripheral surface thereof. And it is stuck on the cylindrical frame member 41 via a pair of seal parts formed along the long sides of the belt so as to maintain the wound state. A large number of symbols as identification information are printed at equal intervals on the outer peripheral surface of the belt. A boss 42 is formed at the center of the cylindrical frame member 41, and is attached to the drive shaft of the stepping motor 33 via a disc-like boss reinforcing plate 43. Therefore, when the drive shaft of the stepping motor 33 is rotated, the cylindrical framework member 41 is rotated about the drive shaft, and the left reel 32L is rotated.

  The stepping motor 33 is fixed to a side surface of a motor plate 44 disposed in an upright state in the reel unit 31 by a screw 45. The motor plate 44 is provided with a reel index sensor 46 in which the light emitting element 46 a and the light receiving element 46 b are held at a predetermined interval. On the other hand, a base end portion 47 b of a sensor cut band 47 extending in the radial direction is fixed by a screw 48 to the boss reinforcing plate 43 integrated with the left reel 32 L. The tip end portion 47 a of the sensor cut bun 47 is bent so as to be substantially at a right angle, and is aligned so as to be able to pass between the two elements 46 a and 46 b of the reel index sensor 46. Then, every time the left reel 32L makes one rotation, the reel index sensor 46 detects the passage of the front end portion 47a of the sensor cut bun 47, and a detection signal is output to the main control device 70 described later each time. Therefore, main controller 70 can check and correct the angular position of left reel 32L every one rotation based on this detection signal.

  The stepping motor 33 is set to rotate once by giving an excitation signal of, for example, 504 pulses, and the rotational position of the stepping motor 33, that is, the rotational position of the left reel 32L is controlled by this excitation signal.

  On each belt of the reels 32L, 32M, 32R, a plurality of, specifically, 21 symbols are drawn in the direction of the long side (surrounding direction). Therefore, it takes 24 pulses (= 504 pulses / 21 symbols) to switch from one symbol to the next symbol at a predetermined position. Then, based on the number of pulses from the time when the detection signal of the reel index sensor 46 is output, it is recognized which symbol is in a visible state from the display window 21L, or an arbitrary symbol is displayed from the display window 21L. Control can be performed to make the state visible.

  Among the symbols attached to each reel 32L, 32M, 32R, the number of symbols visible in the whole through the display windows 21L, 21M, 21R is mainly the length of the display windows 21L, 21M, 21R in the vertical direction Is limited to a predetermined number determined by In the present embodiment, three reels are provided. Therefore, in the state where all the reels 32L, 32M, 32R are stopped, 3 × 3 = 9 symbols become visible to the player.

  Here, the symbols attached to the respective reels 32L, 32M, 32R will be described. FIG. 4 shows an arrangement of symbols drawn on a belt wound around each of the left reel 32L, the middle reel 32M and the right reel 32R. As shown in the figure, 21 symbols are provided in a row on each of the reels 32L, 32M and 32R. Although the numbers 1 to 21 are assigned corresponding to the respective reels 32L, 32M, 32R, this is for convenience of explanation and is not actually attached to the reels 32L, 32M, 32R. . However, the following description will be made using the corresponding numbers.

  As the symbols, there are a "7" symbol (for example, the left belt twentieth) and a "youth" symbol (for example, the left belt nineteen) as a first special symbol for shifting to a big bonus game. In addition, there is a "BAR" symbol (for example, the 14th left belt) as a second special symbol for shifting to the regular bonus game. In addition, there is a "replay" symbol (for example, the 11th left belt) as a third special symbol for shifting to the replay game. In addition, the "watermelon" symbol (for example, the left belt ninth), the "bell" symbol (for example, the left belt eighth), the "cherry" symbol (for example, the left) There is a belt fourth). And, as shown in FIG. 4, in the belts wound around the reels 32L, 32M, 32R, the number and arrangement order of various symbols are completely different.

  A total of five combination lines, three in parallel in the lateral direction and two in diagonal direction, are attached to the game panel 20 so as to connect the display windows 21L, 21M, 21R.

  Here, the number of payouts for each symbol when winning will be described. With regard to the small character pattern, if the "watermelon" symbol is aligned with the left, middle and right on the effective line, 15 medals are paid out, and the "bell" symbol is aligned with the left, middle and right on the effective line The player pays out eight medals, and when the "cherry" symbol on the left reel 32L stops on the effective line, two medals are paid out. That is, the "cherry" symbol of the middle reel 32M and the right reel 32R is irrelevant to the medal payout. In addition, in the case of the "cherry" symbol, medals are paid out independently of the combination with other symbols, so that "in the upper or lower row" a plurality of effective lines of the left reel 32L overlap. When the pattern of "cherry" is stopped, medals are paid out by multiplying the number of the overlapping effective lines, and as a result, four medals are paid out in the present embodiment.

  The second special symbol (regular bonus symbol) when the "7" symbol or "youth" symbol which is the combination of the first special symbol (big bonus symbol) is aligned with the left, middle and right on the effective line with the same symbol If the "BAR" symbol, which is a combination of the symbols, aligns with the left, middle and right on the effective line, the medals will not be paid out. Even if the "Replay" symbol, which is a combination of the third special symbol, aligns with the left, middle, and right on the activated line, medals are not paid out, but a new game is started without throwing a medal. It becomes possible. In other cases, that is, when the "cherry" symbol of the left reel 32L does not stop on the effective line, and when the same symbol as the left, middle or right does not align on the effective line, no medal is paid out.

  On the lower left side of the game panel 20, as shown in FIG. 1, there is provided a start lever 51 operated to start the rotation of each of the reels 32L, 32M, 32R. When the start lever 51 is operated while medals are being inserted, the reels 32L, 32M, 32R start to rotate all at once.

  On the right side of the start lever 51, button-like stop buttons 52, 53, 54 are provided which are operated to individually stop the rotating reels 32L, 32M, 32R. The respective stop buttons 52, 53, 54 are disposed immediately below the display windows 21L, 21M, 21R corresponding to the reels 32L, 32M, 32R to be stopped. The stop buttons 52, 53, and 54 can be stopped when a predetermined time has elapsed after the left reel 32L starts rotating.

  On the lower right side of the display windows 21L, 21M, 21R, a medal insertion slot 55 for inserting a medal as an investment value is provided. The medal inserted from the medal insertion slot 55 is guided to the hopper device 64 if it can be inserted by the selector 61 provided on the back of the front door 12 as shown in FIG. From the medal discharge port 17 provided at the lower front of the front door 12, the medal receiver 18 is guided. The hopper device 64 has a function of paying out the medals stored in the storage tank to the medal receiver 18 through the medal discharge port 17 when a prize corresponding to the provision of the medals is established on the above-mentioned effective line. There is.

  Below the medal insertion slot 55, as shown in FIG. 1, a return button 56 is provided, which is pressed when the medal inserted into the medal insertion slot 55 gets stuck in the selector 61. Further, on the lower left side of the display windows 21L, 21M, 21R, first credit insertion buttons 57 to 59 for inserting credited virtual medals as investment values are provided.

  On the left side of the start lever 51, a button-like switching button 60 is provided. When the switching button 60 is in the on state, the "credit mode" is set such that surplus inserted medals up to a predetermined maximum value (for example, 50 medals) or medals obtained at the time of winning are stored and stored as credit medals. It becomes ". When the switching button 60 is in the OFF state, the "direct mode" is set such that the extra insertion medals and the medals obtained at the time of winning are paid out as actual medals.

  The procedure of betting medals will be described. When one medal is inserted into the medal insertion slot 55 or when one virtual medal is inserted by the operation of the credit insertion buttons 57 and 59, the central line becomes an effective line. When two medals are inserted into the medal insertion slot 55 or when two virtual medals are inserted by operating the credit insertion buttons 58 and 59, a total of three including the central line, the upper line and the lower line Each combination line is an effective line. When three medals are inserted into the medal insertion slot 55 or when three virtual medals are inserted by the operation of the credit insertion button 59, the center line, the upper line, the lower line, and the pair of diagonal lines are included. A total of five combination lines become effective lines.

  When four or more medals are inserted into the medal insertion slot 55, surplus medals exceeding three are returned to the medal receiver 18 by the selector 61 if the mode at that time is the direct mode. On the other hand, if it is in the credit mode, it is saved as a virtual medal inside the slot machine. The upper limit number of sheets is determined (for example, 50), and when the number of medals exceeding that is inserted, the medal receiver 18 is returned to the medal receiver 18.

  In the upper part of the front door 12, there is an upper lamp 22 which lights up or blinks with the progress of the game, and a pair of left and right which sound various effect sounds with the progress of the game or inform the player of the game state And an auxiliary display unit 24 such as a liquid crystal display for giving various information to the player.

  As shown in FIG. 2, a power supply device 65 is provided on the left side of the hopper device 64 inside the housing 11. The power supply device 65 includes a power button 66 operated at the time of power on or power off, a reset button 67 for resetting various states of the slot machine 10, and a setting state of the slot machine 10 from "setting 1" And a setting key insertion hole 68 operated to change in the range of setting 6 ".

  A main control unit 70 is attached to the back plate of the housing 11 above the reel unit 31. The main control device 70 is provided with a main substrate, and the main substrate is accommodated in a substrate box as a covering means made of a transparent resin material or the like. The substrate box includes a substantially rectangular box base and a box cover covering an opening of the box base. The box base and the box cover are unopenably connected by a sealing unit as sealing means, whereby the substrate box is sealed.

<Electric Configuration of Slot Machine 10>
Next, the electrical configuration of the slot machine 10 will be described based on the block diagram of FIG.

  The main controller 70 is mounted with a microcomputer having a CPU 71 as an arithmetic processing means. In addition to the power supply device 65, a clock circuit 74 that outputs a rectangular wave of a predetermined frequency, an input / output port 75, and the like are connected to the CPU 71 via an internal bus. The main controller 70 functions as a main base incorporated in the slot machine 10.

  On the input side of the main control unit 70, a start detection sensor 51a for detecting the operation of the start lever 51, stop detection sensors 52a, 53a and 54a for individually detecting the operations of the respective stop buttons 52, 53 and 54, and a medal insertion slot Switching of detecting the operation of the inserted medal detection sensor 55a for detecting medals inserted from the 55, the credit insertion detection sensors 57a, 58a, 59a for individually detecting the operation of the credit insertion buttons 57, 58, 59, and the switching button 60 Detection of operation of detection sensor 60a, reel index sensor 46 for individually detecting rotational position (origin position) of each reel 32L, 32M, 32R, payout detection sensor 64a for detecting medals dispensed from hopper device 64, and reset button 67 Set in the setting key insertion hole 68 Key is connected to various sensors such as setting the key detection sensor 68a that detects that it has been inserted, the signals from these various sensors are outputted to the CPU71 via the input-output port 75.

  Further, on the input side of the main control device 70, a power failure monitoring circuit 65 b provided in the power supply device 65 is connected via the input / output port 75. The power supply unit 65 includes a power supply unit 65a for supplying drive power to the main control unit 70 and other electronic devices of the slot machine 10, the above-mentioned power failure monitoring circuit 65b, and the like.

  The power failure monitoring circuit 65b monitors the power-off state and generates a power failure signal at the time of power interruption by the power switch 66 as well as at the time of power interruption. Therefore, the power failure monitoring circuit 65b monitors the stabilized drive voltage of DC 24 volts in this example output from the power supply unit 65a, and determines that the power is shut off when the drive voltage is reduced to, for example, less than 10 volts. And a power failure signal is output. The power failure signal is supplied to the CPU 71, and the CPU 71 recognizes the power failure signal to execute power failure processing.

  A stepping motor 33 for rotating the reels 32 L, 32 M, 32 R, a hopper device 64, a display control device 80 and the like are connected to the output side of the main control device 70 via the input / output port 75.

  The display control device 80 is a control device for driving the upper lamp 22, the speaker 23, and the auxiliary display unit 24, and includes a substrate in which a CPU, a ROM, a RAM, and the like for driving them are integrated. Then, after receiving a signal from the main control device 70, the display control device 80 independently drives and controls the upper lamp 22, the speaker 23, and the auxiliary display unit 24.

  In the CPU 71 described above, a ROM 72 storing various control programs to be executed by the CPU 71 and fixed value data, and an operation of temporarily storing various data in executing the control program stored in the ROM 72 Aside from the RAM 73 for securing an area, although not shown, as well known, various processing circuits required in the slot machine 10 such as timer circuits and data transmission / reception circuits including the interrupt circuit as well known, credit counter for counting the number of credits Etc. are built in. The ROM 72 and the RAM 73 constitute a main memory as storage means, and programs for executing the processes shown in the various flowcharts shown in FIG. 6 and later are stored in the ROM 72 as a part of the control program.

  The RAM 73 is configured to be able to receive backup voltage from the power supply device 65 even after the power supply of the slot machine 10 is shut off and to hold data, and to temporarily store various data etc. in the RAM 73. In addition to the memory and area of, a backup area is provided.

  The backup area is an area for storing the stack pointer at power-off, each register, I / O, etc. when the power is shut off due to the occurrence of a power outage, etc. Based on the information of the area, the state of the slot machine 10 can be restored to the state before the power-off. The writing to the backup area is executed when the power is shut down by the power failure process, and the restoration of each value written to the backup area is executed in the main process when the power is turned on. A power failure signal from the power failure monitoring circuit 65b is input to the NMI terminal (non-maskable interrupt terminal) of the CPU 71 at the time of power failure due to the occurrence of a power failure or the like. NMI interrupt processing as flag generation processing is immediately executed.

<Process Performed by CPU 71 of Main Control Device 70>
Next, each control process executed by the CPU 71 in the main control device 70 will be described.

  The processes of the CPU 71 are roughly classified into a normal process repeatedly executed after execution of the main process started with the power on and a timer interrupt process periodically interrupted and started to the normal process, For convenience of explanation, first, the timer interrupt process will be described, and then the normal process will be described.

<Timer interrupt processing>
FIG. 6 is a flowchart of the timer interrupt process periodically executed by the main controller 70. The CPU 71 of the main controller 70 generates a timer interrupt every 1.49 msec, for example.

  First, in the register save process shown in step S101, the values of all the registers in the CPU 71 used in the normal process described later are saved in the backup area of the RAM 73. In step S102, it is confirmed whether or not the power failure flag is set. If the power failure flag is set, the process proceeds to step S103 to execute power failure processing. The power failure flag is set based on the reception from the power failure monitoring circuit 65b of a signal indicating that a power failure has occurred, and in the case of power failure processing, it is possible to return to the state before power interruption after power recovery. Execute the process

  If the power failure flag is not set in step S102 or after step S103 is performed, the process proceeds to step S104. In step S104, a watchdog timer clear process is performed to initialize the value of the watchdog timer for monitoring the occurrence of a malfunction. In step S105, interrupt termination declaration processing for issuing an interrupt permission to the CPU 71 itself is performed. In step S106, in order to rotate the respective reels 32L, 32M, 32R, stepping motor control processing for driving the respective stepping motors 33 is performed. In step S107, a sensor monitoring process is performed to monitor the states of various sensors (see FIG. 5) connected to the input / output port 75. In step S108, timer operation processing is performed to reduce the values of the counters and timers.

  In step S109, command output processing for transmitting a command or the like to the display control device 80 is performed. In step S110, port output processing is performed to output data corresponding to the I / O device from the input / output port 75. In step S111, the value of each register saved in the backup area in the previous step S101 is restored to the corresponding register in the CPU 71, respectively. Thereafter, in step S112, an interrupt permitting process for permitting the next timer interrupt is performed, and this series of timer interrupt processes is ended.

<Normal processing>
Next, normal processing for performing main control related to gaming will be described based on the flowchart of FIG.

  First, in step S201, it is determined whether a medal has been betted. When the medal is betted, it is subsequently determined in step S202 whether or not the start lever 51 is operated. When both step S201 and step S202 are YES, the lottery process of step S203 is performed.

  In the lottery process, a random number table for determination of success or failure is selected based on the current setting state of the slot machine 10, the number of betted medals, the high / low probability of the small part probability, etc., and the selected random number table is started. When the lever 51 is operated, the random number latched by the random number counter is illuminated to perform a lottery for the role. Then, when one of the winning combinations is won, a winning flag corresponding to the winning combination is set. Further, a slip table for reel stop control is determined according to the lottery result, and this is stored in the slip table storage area of the RAM 73. Here, if the symbol on the predetermined effective line at the timing when the stop buttons 52 to 54 are pressed and the symbol to be stopped on the effective line are different from the slip table, the symbol to be stopped is specified. It is a table that defines how much to slide the reel so as to stop on the effective line of.

  As the lottery combination, a small combination corresponding to the payout of medals such as a watermelon combination, a bell combination and a cherry combination, a replay combination, a big bonus combination, and a regular bonus combination are set.

  After the lottery process is performed in step S203, the reel control process is performed in step S204.

  In the reel control process, as shown in the flowchart of FIG. 8, first, a weight process is performed in step S301. This weight processing is processing for waiting without starting the rotation of the reel in the current game until a predetermined time (for example, 4.1 seconds) elapses from the start of the rotation of the reel in the previous game. Therefore, even if the player bets medals and operates the start lever 51, the reels 32L, 32M, 32R may not rotate immediately.

  Following the weight processing, the reel rotation processing of step S302 is performed to rotate the respective reels 32L, 32M, and 32R. Thereafter, the process proceeds to step S303, and it is determined whether or not a predetermined time (for example, 8 seconds) has elapsed since the left reel 32L starts rotating. If the predetermined time has elapsed, the process proceeds to step S304, and whether any one of the stop buttons 52 to 54 is pressed to generate a stop command for the reel, more specifically, from the stop detection sensors 52a to 54a It is determined whether an ON signal is received. If the stop command has not been issued, the process returns to step S304.

  If one of the stop buttons 52 to 54 is pressed in step S304 and a stop command is generated, the process proceeds to step S305 to perform reel stop processing. In this reel stop processing, the reel corresponding to the pressed stop button is stopped, but it is won in the lottery of the role, and is stored in the sliding table storage area of the RAM 73 when the winning flag is set. By referring to the slip table, it is controlled so that the winning combinations are arranged on the predetermined effective line as much as possible. For example, if the "watermelon" symbol is lined up on the lower line and if the stop button is pressed at the timing when the "watermelon" symbol stops on the upper line, the symbol 2 is stopped to stop on the lower line. Slide the reels by one. However, since the range which can be slid is predetermined (for example, four symbols at maximum), depending on the timing at which the stop button is pressed, the "watermelon" symbol may not stop on the lower line.

  Subsequently, in step S306, it is determined whether or not the current stop command is the first stop command, that is, whether or not the stop button has been pressed while all three reels are rotating. In the case of the first stop command, the process proceeds to step S307, and a slip table change process is performed. In this slip table change process, for example, it is determined whether combination of the combination occurs when trying to align the combination on the winning line which has won, and when combination of the combination does not occur, it proceeds to the next step as it is, When a combination of winning combination occurs, the winning line is changed to another valid line, and the slip line table is changed to match the new valid line, and then the process proceeds to the next step. Here, with the combination of the roles, for example, when trying to align the "watermelon" pattern on the upper line, a plurality of roles occur simultaneously as when the "cherry" pattern appears on the lower line in the left reel 32L. When you say

  After step S307 or when a negative determination is made in step S306, it is determined in step S308 whether or not all rotations of the left, middle and right reels 32L, 32M and 32R have stopped. If step S308 is NO, the process returns to step S304. If YES, the payout determination process is performed in step S309, and the process ends.

  In the payout determination process, it is determined whether or not the winning combination is aligned on the active line, and when the winning combination is not aligned on the active line, 0 is set in the planned number of payout storage area of the RAM 73, and the winning combinations are aligned on the active line. If yes, it is determined whether or not the combination matches the winning combination, and if not, an error is displayed by the upper lamp 22 or the like, and 0 is set in the expected payout storage area. If they match, the winning combination and the number of payouts corresponding to it are set.

  Returning to the description of the normal processing (FIG. 7), after the reel control processing is executed in step S204, the medal payout processing is executed in step S205. In the medal payout process, medals or virtual medals for the numerical value set in the planned number-of-payouts storage area in step S309 are given to the player.

  Thereafter, special game state processing is executed in step S206. In the special game state process, the special winning combination (big bonus or regular bonus) is won in the normal game, and the combination of symbols corresponding to the winning combination is established on any of the activated lines, and the winning combination is A transition to a corresponding bonus game is performed, and when the end condition is satisfied, processing is performed to end the bonus game and return to the normal game. During the bonus game, the probability of winning a small winning combination is higher than in the normal game, and in particular, when the winning is made by lottery, the bell combination in which winning is achieved regardless of the operation timing of each stop button 52 to 54 is the most You will win with a high probability. In addition, the bonus game ends when the payout number of medals in the bonus game reaches a predetermined number. The predetermined number is set larger in the big bonus game than in the regular bonus game, for example, the former is 350 and the latter is 120. After executing the special game state process in the normal process, the process returns to step S201.

<Operation principle of stepping motor 33>
Next, the stepping motor 33 for rotating the respective reels 32L, 32M, 32R will be described in more detail.

  FIG. 9 is a schematic view showing the operation principle of the stepping motor 33. As shown in FIG. FIG. 10 (a) is a connection diagram showing a drive system of the stepping motor 33, and FIG. 10 (b) is a diagram showing drive characteristics of the stepping motor. FIG. 11 is an explanatory view showing a relationship between excitation data and an excitation order pointer.

  In the present embodiment, a hybrid (HB) type two-phase stepping motor employing a 1-2 phase excitation system is used as the stepping motor 33. The stepping motor is not limited to a hybrid type or two phase, and various stepping motors such as a four phase or five phase stepping motor can be used.

  The hybrid stepping motor 33 includes a rotor 91 disposed at the center, and a stator 90 disposed around the rotor 91 and having first to fourth poles 92 to 95.

  The rotor 91 is composed of a near side rotor 91a magnetized to the N pole and a far side rotor 91b magnetized to the S pole, and teeth and teeth provided around the near side rotor 91a. Between them, the teeth provided around the back rotor 91b are attached to the rotation shaft in a state of being relatively shifted by a half pitch so as to be positioned. And the cylindrical magnet which is not shown in figure is attached between the near side rotor 91a and the back side rotor 91b.

  As shown in FIG. 10A, the exciting coil L0 and the exciting coil L2 are bifilar wound on the first pole 92 and the third pole 94, and the winding end of the exciting coil L0 and the winding start end of the exciting coil L2 are It is wired, and a predetermined DC power supply + B (for example, +24 volts) is applied thereto. Similarly, the exciting coil L1 and the exciting coil L3 are also bifilar wound on the second pole 93 and the fourth pole 95, and the winding end of the exciting coil L1 and the winding start end of the exciting coil L3 are connected to each other. Power supply + B is applied.

  Here, an excitation signal is applied to the exciting coil L0 of the first pole 92, and the phase in which the first pole 92 is excited to the S pole and the third pole 94 is excited to the N pole is referred to as A phase. A phase in which an excitation signal is applied to the excitation coil L2 of the third pole 94 to excite the first pole 92 to the N pole and excite the third pole 94 to the S pole is referred to as a reverse A phase. Similarly, an excitation signal is applied to the excitation coil L1 of the second pole 93, and the second pole 93 is excited to the S pole and the fourth pole 95 is excited to the N pole as a B phase. A phase in which an excitation signal is applied to the excitation coil L3 of the fourth pole 95 to excite the second pole 93 to the N pole and excite the fourth pole 95 to the S pole is referred to as reverse B phase.

  When the stepping motor 33 is a one-phase excitation drive system, the rotor 91 is turned clockwise or counterclockwise by sequentially applying excitation signals to the A-phase, B-phase, reverse A-phase and reverse B-phase. It can be driven to rotate.

  That is, for example, when electricity is first applied to the A phase, the protrusion of the first pole 92 which has become the S pole, the teeth of the near side rotor 91a, the protrusion of the third pole 94 which has become the N pole and the teeth of the back side rotor 91b Respectively face each other by suction, and then, when the B phase is energized, the protrusion of the second pole 93 which has become the S pole, the teeth of the near side rotor 91a, the protrusion of the fourth pole 95 which has become the N pole and the back side rotation. The teeth of the child 91b face each other by suction, and then, when the reverse A phase is energized, the projection of the first pole 92 which has become the N pole, the tooth of the back side rotor 91b, and the third pole 94 which has become the S pole. And the teeth of the near side rotor 91a face each other by the attraction force, and then, when the reverse B phase is energized, the teeth of the second pole 93 and the teeth of the back side rotor 91b and the south pole become N pole. The projections of the fourth pole 95 and the teeth of the near side rotor 91a are Face by the suction force. By exciting in this order, the rotor 91 rotates clockwise in FIG.

  On the other hand, in the present embodiment, a 1-2 phase excitation drive in which 1 phase excitation and 2 phase excitation are alternately performed is adopted. In the 1-2 phase excitation drive, excitation is performed according to the following excitation sequence (excitation sequence) of (1) to (8).

  That is, since only one set of excitation is single-phase excitation and two-phase excitation is simultaneous excitation of two phases, as shown in FIG. (1 phase excitation), (2) energize to both A phase and B phase (2 phase excitation), and so on, (3) energize to B phase, (4) to both B phase and reverse A phase Energize, (5) energize reverse A phase, (6) energize both reverse A phase and reverse B phase, (7) energize reverse B phase, (8) both reverse B phase and A phase And then return to (1). In the present embodiment, since the reel is configured to rotate once by the excitation signal of 504 pulses, the angle change based on the excitation signal of 1 pulse, that is, the angle change per step is about 0.714 °.

  The excitation signal for the stepping motor 33 is given to the motor driver 96 as excitation data shown in FIG. The excitation data is stored in the RAM 73 of the main controller 70, and appropriate excitation data is output to the input / output port 75 by timer interrupt processing. An excitation phase for the stepping motor 33 is determined by the excitation data, and an excitation signal (current) is supplied to the excitation phase.

  The excitation phase during initial excitation of the stepping motor 33 is two-phase excitation. In the case of one-phase excitation, the rotational torque generated is smaller than that in two-phase excitation, so a sufficient initial speed may not be obtained. The two-phase excitation is preferable for the initial excitation, because the possibility of the step-out is high if a sufficient initial velocity can not be obtained. Further, based on the pressing operation of the stop buttons 52 to 54, the reels 32L, 32M, and 32R are slipped and stopped by a predetermined step angle until braking is actually performed. When sliding and stopping, it is necessary to perform the next acceleration processing while absorbing the deviation of this angle, and it is preferable that the electromagnetic attraction force at the initial excitation be as large as possible.

  On the other hand, when stopping the stepping motor 33, four-phase excitation is performed immediately after performing two-phase excitation. If the braking process is performed only with two-phase excitation, there is a concern that the player may feel discomfort in the movement of the reels 32L, 32M, 32R when the reels 32L, 32M, 32R are braked because the rotational speed is sharply reduced by the strong braking force. Ru. On the other hand, by performing four-phase excitation immediately after two-phase excitation, the reels 32L, 32M, and 32R can be smoothly stopped.

  When the stepping motor 33 is used, a driving characteristic as shown in FIG. 10 (b) is required.

  This driving characteristic can be roughly divided into an acceleration period Ta and a constant speed period from when the start lever 51 is operated to when the stepping motor 33 starts rotation and reaches constant constant speed rotation. It is divided into a maintenance period Tb in which the rotational speed is maintained until the pressing operation of the button 54 is performed, and a stop period Tc in which the rotation is stopped with a predetermined slip based on the pressing operation of the stop buttons 52-54.

  There is no restriction on the length of the acceleration period Ta, but the restriction that the time including the acceleration period Ta and the sustain period Tb when the stop buttons 52 to 54 are not operated should be 30 seconds or more. ing. Also for the stop period Tc, it is required to stop the stepping motor 33 within about 190 msec at maximum after operating the stop buttons 52 to 54.

<Drive control of stepping motor 33>
Next, the configuration of drive control of the stepping motor 33 will be described.

  As described above, the stepping motor 33 transitions to the constant speed rotation state after the acceleration period, but since the acceleration period becomes a forced waiting time for the game, the stepping motor 33 is fixed from the acceleration state as soon as possible. It is desirable to make transition to the state of fast rotation. For this purpose, switching of the excitation phase of the stepping motor 33 may be performed quickly, but this may lead to step out and instability of rotation.

  In particular, in the stepping motor 33, when the teeth of the rotor 91 are attracted to the protrusions of the poles 92 to 95 at the time of initial excitation, the initial rotation of the rotor 91 (micro oscillation with reciprocation) is Occur. Although different depending on the specification of the reel unit 31, etc., for example, a swing of one reciprocation in 30 msec occurs approximately 5 to 6 reciprocations. Therefore, it is necessary to set the switching mode of the excitation phase in the acceleration period while taking into consideration such initial rotation shake.

  As a method of accelerating the stepping motor 33 while suppressing the influence of the initial rotational shake, a method of maintaining an initial excitation state to a certain extent can be considered. For example, a configuration may be considered in which the excitation phase is switched at timing as shown in FIG. In this case, the state set to the two-phase excitation as the initial excitation is held for 130 interrupts (that is, 130 times the timer interrupt processing), and then switched to the one-phase excitation, and the state is held for eight interrupts. The two-phase excitation is switched, and thereafter, the switching interval of the excitation phase is gradually shortened. In this configuration, 193.7 msec (= 1.49 msec × 130 interrupts) is set as the initial excitation period, and during this period, the initial rotational shake can be eliminated. However, in the present configuration, the acceleration period becomes long.

  On the other hand, in the present embodiment, it is not necessary to ensure a long initial excitation period as described above, but before shortening the switching interval of the excitation phase stepwise to achieve a constant speed state. By setting a period in which the switching interval is gradually extended, the initial rotation shake is eliminated early. Although the specific excitation pattern which enables such an acceleration process changes with the specifications of the reel unit 31, an excitation pattern as shown, for example in FIG. 13 is mentioned.

  Hereinafter, the excitation pattern will be described in detail with reference to FIG. 14 in addition to FIG.

  FIG. 13 is an explanatory view for explaining an example of the excitation pattern in the present embodiment, and FIG. 14 is a case where the excitation pattern of FIG. 12 is applied and when the excitation pattern of FIG. It is a figure for demonstrating the time change of the number of steps with respect to an interruption. In FIG. 14, the solid line indicates the case where the excitation pattern shown in FIG. 13 is applied, and the broken line indicates the case where the excitation pattern shown in FIG. 12 is applied.

  An acceleration table for realizing the excitation pattern as shown in FIG. 13 is stored in advance in the ROM 72. In the acceleration table, at least data of the acceleration counter and data of a switching interval corresponding to the data of the acceleration counter are set.

  In the excitation pattern shown in FIG. 13, a long and short period T1 in which the switching interval of the excitation phase is long and short is set from the timing of the initial excitation. Specifically, first, two-phase excitation is maintained for two interrupts as initial excitation. The period in which the initial excitation is held is equal to or less than the longest period (7 interrupts) held in the predetermined excitation phase in the long and short period T1, and in detail, the shortest held in the predetermined excitation phase in the long and short repetition period It is a period.

  Thereafter, a first elongation period T11 in which the switching interval of the excitation phase gradually increases, a shortening period T12 in which the switching interval of the excitation phase gradually shortens, and a second elongation in which the switching interval of the excitation phase gradually increases. The period T13 is set in this order. In each lengthening period T11, T13, as shown in FIG. 14, the number of steps for one interrupt decreases with the passage of time, so the switching speed of the excitation phase gradually decreases. On the other hand, in the shortening period T12, as shown in FIG. 14, since the number of steps for one interrupt increases with the passage of time, the switching speed of the excitation phase gradually increases.

  The lengthening periods T11 and T13 and the shortening period T12 are set by using switching intervals of three or more types of excitation phases, as shown in FIG. Specifically, it is set by using the switching intervals of five types of excitation phases. In detail, for each of the periods T11 to T13, the first lengthening period T11 is set using four types of switching intervals of 2 interrupts, 3 interrupts, 4 interrupts, and 7 interrupts. Further, the shortening period T12 continuous to the first longing period T11 is set using three types of switching intervals so as to be gradually shortened to 4 interrupts and 3 interrupts from the state of 7 interrupts. . In addition, the second lengthening period T11 continuous to the shortening period T12 is set using three types of switching intervals so as to gradually increase to five interrupts and seven interrupts from the state of three interrupts. . By using the switching intervals of three or more types of excitation phases in this manner, the long and short term T1 can be easily set to a desired mode, and design can be facilitated. Note that the switching interval to be used is not limited to five types, and may be four types, or six or more types. Moreover, although each length of each period T11-T13 is different, it is good also as the same length.

  As described above, switching of the excitation phase is performed by timer interrupt processing, so the shortest switching interval is one interrupt, and switching to the excitation phase is performed at the one interrupt interval when the constant speed state is reached. As will be described, each switching interval in the long and short term T1 is set to an interval longer than the shortest switching interval, that is, an interval of two or more interrupts. This makes it possible to prevent step-out from occurring when an external force for eliminating rotational shaking is positively applied through switching of the excitation phase. Moreover, although each switching interval in long and short term T1 is set so that it may not become the same continuously, the range which becomes the same continuously may exist.

  In the long and short period T1, as described above, the switching interval becomes longer or shorter and vibrates. That is, as shown in FIG. 14, in the long and short period T1, the number of steps for one interrupt decreases or increases as time passes. As a result, the force applied to the rotor 91 is increased or decreased more than before.

  Here, when a vibration sensor is attached to one of the reels 32L, 32M, and 32R, and the relationship between the vibration intensity and the frequency is measured in a situation where the reel is rotating at a constant speed, “predetermined frequency × n (n : Natural number) ”, the vibration intensity increased, and it was found that the frequency corresponds to the frequency of the initial rotational shake. However, this rotational shake is such that the player can not recognize. Also, the value of “predetermined frequency” changes depending on the torque of the stepping motor 33 used, the moment of inertia of the reel used, and the like.

  Even when the frequency for switching the switching interval long and short in the long and short term T1 (hereinafter, also referred to as "long and short frequency") matches the above "predetermined frequency x n", compared to the case where the long short term T1 is not set Although it is possible to early suppress the initial rotational shake, it is preferable to make the “long and short frequency” different from the “predetermined frequency × n”.

  For example, in the configuration to which the excitation pattern shown in FIG. 13 is applied, the switching interval is the same for the fourth acceleration order and the eighth acceleration order, so this range can be regarded as one cycle. Then, the time for one cycle is the product of 19 interrupts which is the sum of switching intervals of the fifth acceleration order to the eighth acceleration order, and the timer interruption period (1.49 msec), 28.31 msec. It becomes. Then, the above "long and short frequency" becomes about 35 Hz. On the other hand, since the above "predetermined frequency" in the reel unit 31 to which the excitation pattern shown in FIG. 13 is applied was found to be 20 Hz by experiment, the above "long and short frequencies" Become.

  For example, by making the “long and short frequency” the same as the “predetermined frequency × n” and making the phase different from the initial rotational shake, it is possible to early suppress the initial rotational shake. . However, no sensor is provided to detect the rotational stop positions of the reels 32L, 32M, 32R, and the stop positions are not strictly controlled when the reels 32L, 32M, 32R stop rotating, so theoretically The rotation stop position to be introduced and the actual rotation stop position are shifted. In particular, when the rotation is stopped, as described above, four-phase excitation is performed to smooth the movement of the reels 32L, 32M, 32R at the time of braking, but in this case, the rotation stop position is easily shifted. As a pattern of deviation of the rotation stop position, four types of one-phase excitation types are set, and after rotation stop, even if braking is performed by two-phase excitation or four-phase excitation, it is stable at one-phase excitation position Because there will be four types. On the other hand, it is not necessary to grasp a phase by making both frequencies differ as mentioned above, and it becomes possible to control the above-mentioned initial stage rotational shake certainly and early.

  Thus, when making both frequencies differ, it is preferable that the said "long and short frequency" differs with respect to the said "predetermined frequency x n" by "predetermined frequency" x 0.1 or more, "predetermined frequency" x It is preferable that the difference is 0.2 or more. In addition, the above-mentioned "long and short frequency" is 10 Hz or more and 50 Hz or less in order to suppress the occurrence of the step-out while making it possible for the player to recognize that the reels 32L, 32M, 32R rotate smoothly in the long and short term T1. Preferably, 15 Hz or more and 45 Hz or less are more preferable. Further, by setting the frequency range, a step out occurs at low voltage driving, a step out occurs when the torque fluctuates, and a step out when the drive voltage fluctuates. It becomes possible to suppress suitably.

  The long and short term T1 is set to 35 interrupts, that is, 52.15 msec (= 1.49 msec × 35 interrupts). This is a period shorter than a period (for example, 150 msec to 180 msec) required for the initial rotational shake to disappear when holding the state of the initial excitation by the two-phase excitation. Further, the long and short term T1 is a period longer than the period of one cycle in the case of making the switching interval of the excitation phase long and short. However, the period is shorter than the period of two cycles. By thus setting the long and short time period T1 longer than the period of one cycle, it is possible to early suppress the initial rotation shake. In addition, the acceleration period can be shortened by setting the period shorter than the period of two cycles.

  Even in the case where the long and short period T1 has elapsed, the initial rotational shake has not completely disappeared. However, at the timing when the long and short period T1 has elapsed, the initial rotational shake is suppressed to a certain extent (for example, about 50%) compared to the timing when the excitation is started. The initial rotational shake can be eliminated while making the acceleration of the reels 32L, 32M, 32R look good in the process. As described above, the acceleration period can be shortened by terminating the long- and short-period T1 before the initial rotational shake completely disappears. In addition, it is possible to reduce the data capacity.

  In the acceleration period, as shown in FIG. 13, after the long and short period T1, a stepwise shortening period T2 is set in which the switching interval of the excitation phase is shortened stepwise so as to attain a constant speed state. That is, in the stepwise shortening period T2, as shown in FIG. 14, the number of steps for one interrupt gradually increases.

  In this case, as shown in FIG. 13, the last switching interval in the long term T1 is set to 7 interrupts which is the longest switching interval, and in the stepwise shortening period T2, one interrupt is added from the longest switching interval. The switching interval can be shortened so as to shorten the switching interval. Further, when the switching interval is 4 interrupts or 3 interrupts, the same switching interval is set over switching of the excitation phase for 6 times. Also, when the switching interval is 2 interrupts, the same switching interval is set over the switching of the excitation phase of seven times. After that, the switching interval becomes one interrupt, and the acceleration period ends. After the acceleration period ends, the switching interval is maintained at one interrupt, and the constant speed state is established.

  By setting the excitation pattern as described above, it is possible to prevent the step out and the rotation from becoming unstable, and to make the appearance of the reels 32L, 32M, 32R good at the time of acceleration, and to perform the initial rotation described above. It becomes possible to reduce shaking early and to shorten the acceleration period. Specifically, as shown in FIG. 14, in the excitation pattern as shown in FIG. 12, it took 300 msec or more to reach the constant speed state, but in the excitation pattern as shown in FIG. It takes only about 160 msec.

  Next, specific processing contents executed by the CPU 71 will be described.

  First, the reel rotation process will be described with reference to the flowchart of FIG. The reel rotation process is executed in step S302 of the reel control process (FIG. 8).

  In the reel rotation process, first, the timer interrupt process is inhibited in step S401, and in the subsequent steps S402 to S404, "30" is set to the acceleration counter of each reel 32L, 32M, 32R. The acceleration counter is provided in the RAM 73, and the CPU 71 grasps the switching timing of the excitation phase in the acceleration period of the reels 32L, 32M, 32R based on the numerical information of the acceleration counter. Thereafter, in step S405, after the timer interrupt process is permitted, the present reel rotation process is ended.

  Next, the stepping motor control process will be described with reference to the flowchart of FIG. The stepping motor control process is executed in step S106 of the timer interrupt process (FIG. 6).

  First, in step S501, it is determined whether control of any stepping motor 33 is necessary. In step S501, after making an affirmative determination in step S202 of the normal process (FIG. 7), an affirmative determination is made until all the reels 32L, 32M, 32R stop rotating. If a negative determination is made in step S501, the present control processing is ended as it is, and if a positive determination is made in step S501, the process proceeds to step S502.

  In step S502, based on the detection result of the reel index sensor 46 and the number of times of output of the excitation data, processing for grasping the rotational position of the reels 32L, 32M, 32R to be processed is executed. In step S503, the braking start timings of the reels 32L, 32M and 32R to be processed are determined based on the operation timing of the stop buttons 52 to 54 corresponding to the reels 32L, 32M and 32R to be processed and the slip table. Execute processing to grasp.

  In the following step S504, motor control processing is performed. In the motor control process, generation processing of excitation data for rotation control with respect to the stepping motor 33 is performed, and the generated excitation data is stored in the RAM 73.

  In the following step S505, it is determined whether or not the motor control process has ended for all reels in rotation. If not completed, the processing of step S502 to step S504 is executed on the remaining reels, and if completed, the processing proceeds to step S506.

  In step S506, the excitation data for each of the rotating reels 32L, 32M, 32R is output to the input / output port 75, and then the control process ends. Since the output to the input / output port 75 is a process of writing data to the corresponding output port of the input / output port 75, the excitation data is supplied to the motor driver 96 simultaneously with the writing of the excitation data to the input / output port 75. become. As a result, the stepping motor 33 immediately conducts energization processing to the excitation phase designated by the excitation data, and excitation processing is performed on the rotor 91.

  Next, the motor control process of step S504 will be described with reference to the flowchart of FIG.

  In the motor control process, a switching interval counter, an acceleration counter, and an excitation order pointer provided in the RAM 73 are used. The acceleration counter is as described above. In the switching interval counter, the number of timer interrupts corresponding to the switching interval of the excitation phase is set. The excitation order pointer is a pointer used when determining the excitation phase for the stepping motor 33. When the stepping motor 33 of 1-2 phase excitation is used, 1 phase excitation and 2 phase excitation are performed alternately, and the phase excitation pattern at that time becomes eight patterns as shown in FIG. It is designated by the value (0 to 7) of this excitation order pointer whether which excitation data is acquired as output excitation data at which phase excitation and this is temporarily stored in the RAM 73.

  In the motor control process, first, at step S601, it is determined whether or not the target reels 32L, 32M, 32R are braking. If braking is not in progress, the numerical information of the switching interval counter is decremented by one at step S602 on condition that the numerical information of the switching interval counter is "1" or more, and after the subtraction at step S603. It is determined whether or not the numerical information of is "0". If the numerical value information is not "0", the present motor control processing is ended as it is, and if it is "0", the processing proceeds to step S604 and subsequent steps.

  In step S604, an acceleration table as shown in FIG. 13 is read out from the ROM 72, and in step S605, data of the switching interval corresponding to the current value of the acceleration counter is set in the switching interval counter. For example, when rotation of the reels 32L, 32M, 32R is started, the reel rotation process (FIG. 15) is executed, so that the numerical information of the acceleration counter corresponds to "30" corresponding to the first order of acceleration in the acceleration table. It has become. In this case, in step S605, the numerical value information of "2" is set in the switching interval counter.

  In the following step S606, the excitation order pointer update process is executed. Specifically, the numerical information of the excitation order pointer is incremented by 1, and when the numerical information after the addition exceeds “7” which is the maximum value of the excitation order pointer, the numerical information is cleared to “0”. Do. Thereafter, in step S607, an excitation data table as shown in FIG. 11 is read from the ROM 72, and excitation data corresponding to numerical information of the current excitation order pointer is read. Then, the read excitation data is stored in the RAM 73 as current excitation data for the reels 32L, 32M, 32R which are targets of the motor control process.

  In the subsequent step S608, the numerical information of the acceleration counter is decremented by one, on the condition that the numerical information of the acceleration counter is "1" or more. As a result, when the next switching of the excitation phase is performed for the reels 32L, 32M, and 32R that are to be processed this time, data of the switching interval corresponding to the numerical information of the acceleration counter after this subtraction is set. In this case, as described above, the process of step S608 is executed on the condition that the numerical value information of the acceleration counter is "1" or more, and therefore, the numerical information of the acceleration counter is already "0". Is maintained in that state. The switching interval when the numerical information of the acceleration counter is "0" is one interrupt as shown in FIG. Therefore, when the numerical information of the acceleration counter becomes "0", an affirmative determination is made in step S603 each time the timer interrupt process is executed, and switching of the excitation phase is performed by the numerical information of the excitation order pointer Run according to This state is a constant speed state.

  After the process of step S608 is executed, it is determined in step S609 whether or not it is the braking start timing of the reels 32L, 32M, 32R to be processed. If it is not the braking start timing, the present motor control processing is ended. If it is the braking start timing, the present motor control processing is ended after the braking setting processing is executed in step S610.

  In the braking setting process, control data for braking is read from the ROM 72 so that four-phase excitation is performed immediately after performing two-phase excitation. By executing the braking setting process, in the next motor control process for the reels 32L, 32M, and 32R to be processed, an affirmative determination is made in step S601, and the braking process in step S612 is performed. As a result, in the stepping motor 33 corresponding to the reels 32L, 32M, and 32R to be processed, after performing two-phase excitation for one interrupt, four-phase excitation is performed over a braking period (for example, ten interrupts). Do.

  As described above, by driving and controlling the stepping motor 33 using the acceleration table, it becomes possible to control the switching interval, that is, the number of steps for one interrupt in the manner shown by the solid line in FIG. It is possible to reduce the initial rotational shake early.

<Example>
Hereinafter, although the configuration for executing the above-described acceleration processing will be described in more detail by way of examples, the present invention is not limited thereto.

Example 1
A cylindrical frame member 41 manufactured to have an outer diameter of 230 mm, a thickness of 1.5 mm, and a weight of 49.7 g with ABS resin is made of polycarbonate resin, a belt length of 754.5 mm, a thickness of 0.35 mm, and a weight of 16.4. By winding a 2 g belt and further supporting the cylindrical frame member 41 on a motor plate 44 to which a stepping motor 33 (BH 252574608 manufactured by Brother Enterprise Co., Ltd.) is fixed, as shown in FIGS. A reel was made. Further, three reels 32L, 32M, 32R were manufactured by the same manufacturing method, and were installed in the housing 11 as shown in FIG.

Example 2
A cylindrical frame member 41 made of ABS resin so as to have an outer diameter of 250 mm, a thickness of 1.5 mm and a weight of 53.9 g is made of polycarbonate resin, a belt length of 822.3 mm, a thickness of 0.35 mm, a weight of 19. By winding an 8 g belt and further supporting the cylindrical frame member 41 on a motor plate 44 to which a stepping motor 33 (BH 252574614 manufactured by Brother Enterprise Co., Ltd.) is fixed as shown in FIGS. A reel was made. Further, three reels 32L, 32M, 32R were manufactured by the same manufacturing method, and were installed in the housing 11 as shown in FIG.

<Measurement of vibration waveform>
For the reel unit 31 manufactured according to Example 1 and Example 2, a vibration sensor was attached to the left reel 32L, and a vibration waveform in a constant speed state was measured. The results are shown in FIG. As a result, in Example 1, it was found that the vibration acceleration becomes large at about 20 Hz × n (n = 1, 2, 4). Moreover, about Example 2, it turned out that vibration acceleration becomes large by about 35 Hz x n (n = 1, 2, 4). The same results as for the left reel 32L are obtained for the middle reel 32M and the right reel 32R.

<Evaluation at acceleration>
About Example 1, control processing as shown in FIGS. 15-17 was performed using the excitation data table as shown in FIG. 11, and the table for acceleration as shown in FIG. In this case, a mark was attached to a predetermined place on the surface of the left reel 32L, and the amount of fluctuation of the position of the mark accompanying the execution of the acceleration processing was measured by performing image photographing and image analysis. The results are shown in FIGS. 19 and 20. In addition, the time for one cycle in the case where the switching interval of the excitation phase is shortened in the long and short period T1 is 28.31 msec, and the "long and short frequency" is about 35 Hz.

  FIG. 20 is an enlarged view of the range of 0 to 80 msec in FIG. Also, “theoretical position” is a fluctuation amount of the left reel 32L theoretically derived based on the acceleration table, and “measured position 1” to “measured position 4” are the left reels actually measured using the above marks It is a fluctuation of 32 liters. In this case, as described above, four types of one-phase excitation are set as patterns of deviation of the rotation stop position, and it is assumed that braking is performed by two-phase excitation or four-phase excitation after rotation is stopped There are also four types because one is stable at the one-phase excitation position. Therefore, by making the positions of the marks before the start of the acceleration processing different by making each rotation stop position correspond one-to-one, the acceleration processing is performed for each case, so that “measured position 1” to “measured position 4” We got four kinds of results.

  As shown in FIGS. 19 and 20, for any of “measured position 1” to “measured position 4”, before the long and short period T1 elapses (specifically, until 52.15 msec elapses), It can be confirmed that the initial rotational shake is suppressed to some extent and completely disappears in the subsequent stepwise shortening period T2.

  In the second embodiment, the above test was performed in the same manner as the first embodiment except that as the acceleration table, the table shown in FIG. 21 was used instead of the table shown in FIG. . Although the illustration of the test results is omitted, the initial rotational shake is suppressed to some extent before the long and short period T1 elapses (specifically, until 68.54 msec elapses) as in FIGS. 19 and 20. It can be confirmed that it completely disappears in the subsequent stepwise shortening period T2. In addition, the time for one cycle in the case where the switching interval of the excitation phase is shortened in the long and short period T1 is 34.27 msec, and the above "long and short frequency" is about 29 Hz.

  By the way, although illustration is omitted, without setting the shortening period T12, it is considered as the stepwise shortening period T2 including the long term T1 and the time from the initial excitation to the end of the stepwise shortening period T2 In the case of setting the same degree as in the case of the first embodiment or the case of the second embodiment, the step-out occurred with a high probability.

<Evaluation when changing "long and short frequency">
In the first embodiment, each acceleration table is set so that the above-mentioned "long and short frequency" becomes about 10 Hz, about 20 Hz, about 35 Hz, about 40 Hz and about 50 Hz, respectively, as shown in FIG. The control process as shown in FIGS. 15 to 17 was performed ten times each using a typical excitation data table, and the "smoothness of acceleration" was visually evaluated. The result is shown in FIG.

  In the case of 10 Hz, the reels 32L, 32M, 32R may appear to stop and appear to be defective due to the switching interval of the excitation phase being too long. For 20 Hz and 40 Hz, there were cases where acceleration was performed smoothly and cases where acceleration was not performed smoothly. This is depending on the stop position of the reels 32L, 32M, 32R when starting the drive control, in which setting of the long and short period T1 acts to actively suppress the initial rotational shake, and the effect thereof It is presumed that this is due to the case in which On the other hand, the frequency was good for 50 Hz and particularly good for 35 Hz.

  In addition, evaluation of “low voltage start”, which is an evaluation of whether or not step-out occurs when starting is performed at a voltage (10 V) lower than the normal drive voltage (24 V) for each frequency, and torque The evaluation of “torque and voltage fluctuation resistance”, which is an evaluation of whether or not a step-out occurs when the voltage is changed, was performed 10 times each. The results are also shown in FIG.

  For 10 Hz, 20 Hz and 50 Hz, a step out occurred for "low voltage start". Further, in the case of 50 Hz, a step-out also occurred with respect to "torque and voltage fluctuation tolerance". On the other hand, in the case of 35 Hz and 40 Hz, no step-out occurred in any of the "low voltage start" and the "torque and voltage fluctuation tolerance".

  In the second embodiment, each acceleration table is set such that the “long and short frequency” becomes about 10 Hz, about 29 Hz, about 35 Hz, and about 50 Hz, respectively. Evaluations of smoothness, low voltage start and torque and voltage fluctuation resistance were performed. The result is shown in FIG.

  In the case of 10 Hz and 50 Hz, the evaluation was the same as in Example 1 above. In the case of 35 Hz, although the evaluation of “low voltage start” and “torque, resistance to voltage fluctuation” is good, “smoothness of acceleration” is smooth when acceleration is performed or smooth. There were times when I could not do it. In the case of 29 Hz, the evaluations of "low voltage start" and "torque, resistance to voltage fluctuation" were good, and in addition, "smoothness of acceleration" was particularly good.

Other Embodiments
In addition, it is not limited to the description content of embodiment mentioned above, For example, you may implement as follows. Incidentally, the following configurations may be individually applied to the above embodiment, or some or all of them may be combined and applied to the above embodiment.

  (1) In order to suppress initial rotational vibration of the stepping motor 33, instead of increasing or decreasing the force applied to the rotor 91 by lengthening or shortening the switching interval of the excitation phase in the acceleration period, the excitation voltage is increased or decreased. The force applied to the rotor 91 may be increased or decreased by causing the pressure to be increased. In this case, the increase or decrease of the excitation voltage may be performed in the process of gradually reducing the switching interval, and a period in which switching of the excitation phase is repeated at one switching interval longer than in the constant speed state. May be set and performed in that period.

  (2) The configuration in which the switching interval of the excitation phase is shortened or shorter in the acceleration period as in the above embodiment may be combined with the configuration in which the excitation voltage is increased or decreased as in the above (1). In this case, the force applied to the rotor 91 can be finely controlled.

  (3) The length of the switching interval of the excitation phase is not limited to the configuration starting from the timing of the initial excitation, and the predetermined excitation phase may be longer than the longest interval in the case of shortening the switching interval. After holding, the switching intervals of the excitation phase may be started to be long and short. In this case, although the acceleration period is longer than in the case of the above embodiment, it is possible to enhance the reduction efficiency of the initial rotational shake.

  (4) 1 / T where T is a period when the switching interval is long or short is limited to a configuration different from the frequency F at which the vibration intensity of the reels 32L, 32M, 32R becomes large in the constant speed state There is no problem, and both may be identical. In this case, by controlling the stop and rotational positions of the reels 32L, 32M, and 32R to always correspond to a predetermined one phase, the phase when changing the switching interval is different from the phase of the initial rotational fluctuation. It is preferable to be in phase. As a method of controlling the stop rotational position, a method of braking the reels 32L, 32M, 32R by using only two-phase excitation instead of four-phase excitation can be considered. In addition to this, a sensor capable of detecting the rotation stop position of the reels 32L, 32M and 32R is provided, and the reels 32L, 32M, and 32L are stopped after rotation stop so that the stop rotation position corresponds to a predetermined one phase. A method of slightly rotating 32R can be considered.

  (5) The period in which the switching interval is long or short is not limited to a configuration that is one or more and less than two cycles of the long and short cycles, and may be two or more cycles or three or more cycles.

  Further, the period during which the switching interval is long or short is not limited to the configuration that is ended before the initial rotational shake completely disappears, but may be completed after the initial rotational shake completely disappears. .

  (6) In the case where the switching interval is extended or shortened, the configuration is not limited to the configuration in which the lengthening period is initially set, and the configuration may be such that the shortening period is initially configured.

  (7) In the above embodiment, an example in which the present invention is embodied for the slot machine 10 is shown. However, the present invention may be applied to a game machine of a type in which the slot machine and the pachinko machine are integrated. That is, the present invention may be applied to a gaming machine having a ball insertion and ball payout function such as a pachinko machine in place of the medal insertion and medal payout function among slot machines.

  Further, the present invention may be applied to a configuration in which a reel unit is used as a pattern display device for teaching a player as an effect the result of an internal lottery in a pachinko machine.

<About the invention group extracted from the above embodiment>
Hereinafter, the features of the invention group extracted from the above-described embodiment will be described while showing effects and the like as necessary. In the following, for ease of understanding, the corresponding configuration in the above embodiment is appropriately shown in parentheses or the like, but the present invention is not limited to the specific configuration illustrated in the parentheses or the like.

Feature 1 An orbiting body (reels 32L, 32M, 32R) on which plural types of patterns are attached in the circumferential direction,
Driving means (stepping motor 33) for rotating the rotating body;
Drive control means for driving and controlling the drive means (a function for executing the reel control process and the stepping motor control process in the CPU 71);
Equipped with
The drive means is a stepping motor having a stator (stator 90) and a rotor (rotor 91), and the drive means is excited to rotate the rotor by rotating the rotor,
The drive control means
Initial drive control means for performing initial drive control of the drive means so as to start rotation of the circulating member and achieve a predetermined rotational speed (when the acceleration counter is 1 or more in the CPU 71, the processing of steps S602 to S608 is performed Function),
After execution of the initial drive control by the initial drive control means, the constant speed drive control means (the acceleration counter is “0” in the CPU 71) performs constant speed drive control of the drive means so as to maintain the predetermined rotational speed. A function of executing the processing of step S602 to step S608),
Equipped with
The initial drive control means causes the force to rotate the rotor by changing an element other than the number of excitation phases during the period in which the initial drive control is being performed. Increase / decrease setting means for causing the period to be increased and the period to be decreased than before (function to execute the processing of step S602 to step S608 when the acceleration counter is "30" to "23" in CPU 71) A game machine characterized by comprising:

  According to the feature 1, since the force to rotate the rotor is positively increased or decreased during the period when the initial drive control is being performed, the rotational vibration generated when the initial drive control is started is It becomes possible to apply a canceling force to the rotor, and it becomes possible to actively reduce the rotational shake. As a result, it is possible to shorten the period required to reach the predetermined rotation speed while suppressing the occurrence of the step-out and the rotation becoming unstable.

Feature 2 An orbiting body (reels 32L, 32M, 32R) on which plural types of patterns are attached in the circumferential direction,
Driving means (stepping motor 33) for rotating the rotating body;
Drive control means for driving and controlling the drive means (a function for executing the reel control process and the stepping motor control process in the CPU 71);
Equipped with
The drive means is a stepping motor having a stator (stator 90) and a rotor (rotor 91), and the excitation phase of the drive means is switched to rotate the rotor by rotating the rotor. Yes,
The drive control means
Initial drive control means for performing initial drive control of the drive means so as to start rotation of the circulating member and achieve a predetermined rotational speed (when the acceleration counter is 1 or more in the CPU 71, the processing of steps S602 to S608 is performed Function),
After execution of the initial drive control by the initial drive control means, the constant speed drive control means (the acceleration counter is “0” in the CPU 71) performs constant speed drive control of the drive means so as to maintain the predetermined rotational speed. A function of executing the processing of step S602 to step S608),
Equipped with
The initial drive control means is a long and short setting means for causing a period during which the switching interval of the excitation phase is longer than that before and a period during which the switching interval between the excitation phases is shorter while the initial drive control is being performed. A game machine characterized by including (a function of executing the processing of step S602 to step S608 when the acceleration counter is “30” to “23” in the CPU 71).

  According to the feature 2, since the switching interval of the excitation phase is long and short while the initial drive control is being performed, the force to rotate the rotor is positively increased or decreased. As a result, it is possible to apply to the rotor a force that cancels the rotational shake that occurs when the initial drive control is started, and it is possible to actively reduce the rotational shake. Therefore, it is possible to shorten the period required to reach the predetermined rotation speed while suppressing the occurrence of the step-out and the rotation becoming unstable.

  Furthermore, according to the present configuration, it is only necessary to adjust the switching interval of the excitation phase, and thus the configuration is simplified and the design is simplified as compared with, for example, the configuration in which the drive voltage is increased or decreased. It is possible to achieve an excellent operational effect.

Feature 3 Let T be a cycle when drive control by the long and short setting means is executed and the switching interval becomes long and short,
Assuming that the frequency at which the strength of the vibration increases in the rotating body rotating at the predetermined rotational speed is F,
The gaming machine according to Feature 2, wherein 1 / T ≠ F.

  Since there are a plurality of stop rotational positions of the rotor, there are a plurality of types of rotational vibration phases when the initial drive control is started. In this case, assuming that the frequency when the switching interval is short and long is the same as the frequency of the rotational vibration, when the phase becomes the same phase, the rotational vibration is increased, or the rotational vibration is continued. It is assumed that the period of time will be extended. On the other hand, according to the feature 3, since the frequency when the switching interval is shortened and the frequency of the rotational vibration are different, the occurrence of the above-mentioned inconvenience is suppressed and the early reduction of the rotational vibration is achieved. It becomes possible to carry out more reliably.

  Feature 4 The gaming machine according to Feature 3, wherein the 1 / T is greater than 10 Hz and less than 50 Hz.

  According to the feature 4, it is possible to obtain the excellent effects as described above while making the characteristics at the time of low voltage start-up, the torque fluctuation resistance, the voltage fluctuation resistance and the like favorable.

  The configuration of the feature 3 or 4 is more effective when applied to a configuration where “the drive control means excites all phases when stopping the rotation of the orbiting body”. That is, in the case of such a configuration in which all phases are excited at the time of stop, the orbiting body can be smoothly stopped, but the rotation stop position becomes irregular. On the other hand, according to the configuration of the feature 3 or 4, it is possible to reduce the rotational shake regardless of the rotation stop position of the rotating body.

  Feature 5 A game machine according to any one of Features 2 to 4, wherein three or more types of switching intervals are set as the switching intervals set by the long / short setting unit.

  According to the feature 5, it is possible to finely set the mode in the case of making the switching interval long and short, and to facilitate the work in designing the drive control pattern for reducing the rotational shake.

  Feature 6 The game machine according to any one of the features 2 to 5, wherein the long and short setting means starts control to lengthen or shorten the switching interval from the start of the initial drive control.

  According to the feature 6, it is possible to reduce the rotational vibration at an early stage, and to facilitate the design of the switching interval when setting to the predetermined rotational speed thereafter.

Feature 7 The constant speed drive control means causes the rotational speed of the orbiting body to be the predetermined rotational speed by setting the switching interval as a specific interval.
The gaming machine according to any one of the features 2 to 6, wherein the switching interval set by the long and short setting means is an interval longer than the specific interval.

  According to the feature 7, it is possible to reliably apply a force for reducing the rotational vibration to the rotor in a period in which the switching interval is long and short.

  Feature 8 The initial drive control means reduces the switching interval stepwise after the drive control by the long and short setting means so that the rotational speed of the circulating member becomes the predetermined rotational speed (in the CPU 71 The game machine according to any one of the features 2 to 7, further comprising a function of executing the processing of step S602 to step S608 when the acceleration counter is “22” to “1”.

  According to the feature 8, since the period for setting the predetermined rotational speed is clearly distinguished from the period for actively reducing the rotational shake, the rotational shake is performed by lengthening the switching interval as described above. It is possible to set the rotational speed of the rotating body to a predetermined rotational speed while suppressing the occurrence of the step-out and the unstable rotation in the configuration in which H.sub.2 is reduced.

  Feature 9 The game according to Feature 8, wherein the switching interval last set by the long / short setting unit is the longest switching interval among the switching intervals set during the period of the drive control by the long / short setting unit Machine.

  According to the feature 9, in the configuration in which the rotational vibration is reduced by lengthening the switching interval as described above, when the rotational speed of the orbiting body is gradually increased so as to be a predetermined rotational speed It is possible to lower the rotational speed at the start. As a result, it is possible to set the rotational speed of the rotating body to a predetermined rotational speed while suppressing the occurrence of step-out and unstable rotation.

  Feature 10 A game machine according to feature 8 or 9, wherein a period during which drive control is performed by the long and short setting means is shorter than a period during which drive control is performed by the step setting means.

  According to the feature 10, it is possible to secure a period for setting the predetermined rotational speed to some extent while shortening the period for reducing the rotational shake. As a result, it is possible to shorten the period required to reach the predetermined rotation speed while suppressing the occurrence of the step-out and the rotation becoming unstable.

  Feature 11. The drive control by the long and short setting means is ended before any rotational vibration of the rotor, which occurs when the initial drive control is started, disappears, according to any one of the features 8 to 10. Gaming machine.

  By reducing the rotational vibration of the rotating body to a certain extent in the period in which the switching interval is made long and short, the rotational vibration is eliminated in the period in which the subsequent switching interval is gradually shortened. In this case, according to the feature 11, the period in which the switching interval is lengthened is ended before the rotational vibration of the rotating body disappears, so that it is possible to shorten the period required to reach the predetermined rotational speed. Become.

Feature 12. Starting operation means (start lever 51) operated to start rotation of the orbiting body;
Stop operation means (stop buttons 52 to 54) operated to stop the rotation of the orbiting body;
Equipped with
The drive control means starts the rotation of the orbiting body based on the operation of the start-up operation means, and stops the rotation of the orbiting body based on the operation of the stop operation means. A game machine according to any one of the features 1 to 11, characterized in that the drive control of the means is performed.

  In the gaming machine, it is possible to achieve the excellent effects as described above.

  The basic configuration of a gaming machine to which the above-described features can be applied will be shown below.

  Pachinko gaming machine: operation means operated by a player, game ball firing means for firing game balls based on the operation of the operation means, a ball passage for guiding the fired game balls to a predetermined game area, and a game A gaming machine comprising: each gaming component arranged in an area, and providing a bonus to a player when a gaming ball passes through a predetermined passing portion of the gaming components.

  Throttle type gaming machines such as slot machines: Start rotation of the orbiter based on the operation of the start operation means, stop rotation of the orbiter based on the operation of the stop operation means, and the player according to the pattern after the stop A gaming machine that grants benefits.

  DESCRIPTION OF SYMBOLS 10 ... Slot machine, 31 ... Reel unit, 32L, 32M, 32R ... Reel, 33 ... Stepping motor, 51 ... Start lever, 52-54 ... Stop button, 70 ... Main control apparatus, 71 ... CPU, 72 ... ROM, 73 ... RAM, 90 ... stator, 91 ... rotor, 96 ... motor driver.

Claims (1)

An orbiter with multiple types of patterns attached in the circumferential direction,
Drive means for rotating the rotating body;
Drive control means for driving and controlling the drive means;
Equipped with
The driving means is a stepping motor having a stator and a rotor, wherein the excitation phase of the driving means is switched to rotate the rotor by rotating the rotor.
The drive control means
Initial drive control means for performing initial drive control of the drive means so as to start rotation of the orbiting body and achieve a predetermined rotational speed;
Constant speed drive control means for performing constant speed drive control of the drive means so that the predetermined rotational speed is maintained after execution of the initial drive control by the initial drive control means;
Equipped with
The initial drive control means
Long and short setting means for causing a period in which the switching interval of the excitation phase is longer and a period in which the switching interval of the excitation phase is shorter while the initial drive control is being performed;
Stage setting means for shortening the switching interval stepwise after drive control by the long and short setting means so that the rotational speed of the orbiting body becomes the predetermined rotational speed;
Equipped with
The switching interval finally set by the long / short setting unit is the longest switching interval among the switching intervals set during the period of the drive control by the long / short setting unit,
A game machine characterized in that the long and short setting means starts control to lengthen or shorten the switching interval from the start of the initial drive control.

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