JP2008040818A - Stepping motor controller, time recorder, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stepping motor controller capable of increasing a card feeding speed for realizing accurate and stable card feed control. <P>SOLUTION: The steeping motor controller 20 supplies first drive pulses to a steeping motor 7 driving a card feed mechanism until a card insertion side front part reaches a predetermined position after card feeding for ejecting a card is started. After arrival at the predetermined position, the steeping motor controller 20 supplies second drive pulses at pulse speed lower than that of the first drive pulses to the stepping motor 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stepping motor control device that drives a card feeding mechanism, and more particularly to a stepping motor control device that drives a time card feeding mechanism in a time recorder.

  For example, a general time recorder used for managing working hours and the like is configured to send a time card inserted into a card insertion slot to a predetermined position by a card feeding mechanism.

  In many cases, a stepping motor (also referred to as a pulse motor) is used as a drive source for a card feeding mechanism in this type of time recorder because of its advantage of being suitable for accurate rotation angle control and having a long service life (for example, patent documents). 1).

  The time recorder disclosed in Patent Document 1 includes a card detection switch that operates when pushed up at the tip of the inserted time card at a position below the insertion slot of the time card. Then, based on the detection of the time card by the card detection switch, the card feeding mechanism conveys (card feeds) the time card to a predetermined position.

JP 2004-110794 A

  However, in the control of the card feeding mechanism in the time recorder of Patent Document 1, when the card feeding speed is increased, the time card is ejected and moved up and down at the time of discharging the time card, so that the card once turned off is detected. There is a possibility that the switch is turned on again and the time card is started to be pulled in.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a stepping motor control device capable of increasing the card feeding speed and realizing accurate and stable card feeding control.

  The stepping motor control device according to the present invention is a stepping motor control device for driving a card feeding mechanism, from the start of card feeding for ejecting a card until the leading end of the insertion side of the card reaches a predetermined position. Supplies a first drive pulse to the stepping motor and, after reaching the predetermined position, a drive pulse supply means for supplying a second drive pulse having a pulse speed slower than that of the first drive pulse to the stepping motor. And comprising.

  Further, when the card feed for discharging the card is started, the number of pulses necessary for the insertion side tip of the card to reach the predetermined position is calculated based on the pulse speed of the first drive pulse. And a pulse counter for counting the number of pulses of the first drive pulse supplied to the stepping motor, and whether or not the predetermined position is reached is determined by the required pulse number calculation means. It is also possible to adopt a configuration in which the determination is made based on the calculation result and the count result of the pulse counter.

  In addition, when the card feeding for discharging the card is started, the time required for the insertion side tip of the card to reach the predetermined position is calculated based on the pulse speed of the first drive pulse. A required time calculating means; and a timer for timing the supply time of the first drive pulse to the stepping motor, wherein whether or not the predetermined position is reached is determined by the calculation result of the required time calculating means and the timer. It may be configured to be determined based on the time measurement result of

  In addition, a time recorder according to the present invention includes any one of the stepping motor control devices configured as described above.

  Further, the computer program according to the present invention is a stepping motor that drives the card feeding mechanism from the start of card feeding for ejecting the card until the insertion side tip of the card reaches a predetermined position. Supplying a first driving pulse to the stepping motor after the predetermined position is reached, and supplying a second driving pulse having a pulse speed slower than that of the first driving pulse to the stepping motor; It is characterized by.

  As described above, according to the stepping motor control device of the present invention, the card ejection can be stabilized by adjusting the card feeding speed for ejecting the card. Further, a time recorder capable of high-speed operation can be provided by using this stepping motor control device.

  Hereinafter, an embodiment of a stepping motor control device according to the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a schematic configuration of a time recorder 1 in which the stepping motor control device according to the present embodiment is mounted.

  In FIG. 1, 3 is a card insertion slot for inserting the time card 2, and 4 is a card detection sensor for detecting when the time card 2 is inserted from the card insertion slot 3. Reference numeral 5 denotes a roller shaft for drawing the inserted time card 2 or pulling out the inserted time card 2, and 6 a and 6 b are a pair of left and right feed rollers provided on the roller shaft 5. 7 is a feed motor that is a drive (rotation) source of the roller shaft 5, and 8 is a timing belt that transmits the driving force of the feed motor 7 to the roller shaft 5. 9a and 9b are a pair of left and right card detection sensors for detecting when the drawn time card 2 reaches the maximum drawing position.

  The feed motor 7 is a stepping motor (pulse motor) that rotates by a predetermined step unit when a pulse signal (drive pulse) is given.

  The card detection sensors 4, 9 a, and 9 b are transmissive optical sensors that detect the front end portion of the time card 2, and include, for example, a light emitting element and a light receiving element (both not shown). In addition, there is no limitation in particular in the kind of sensor, For example, you may be a reflection type optical sensor. Alternatively, it may be a switch type sensor that operates by turning on the lever when the tip of the time card 2 comes into contact.

  FIG. 2 is a block diagram showing an internal configuration of the stepping motor control device 20 according to the present embodiment. The stepping motor control device 20 includes a control unit 21, a drive pulse generation unit 22, a driver 23, a required pulse number calculation unit 24, a pulse counter 25, and the card detection sensors 4, 9a, 9b. .

  The control unit 21 includes a microcomputer (not shown), a ROM that stores a program that defines a processing procedure by the microcomputer, and a RAM that is used for a work area and the like, and controls the stepping motor control device 20 in general. Further, when the card detection sensors 4, 9 a, 9 b detect the leading end portion of the time card 2, signals (detection signals) from the respective card detection sensors are input to the control unit 21. Further, a main controller 30 (for example, a control for controlling the entire time recorder 1) includes information (print position information) about a position where printing is performed on the time card 2 and a signal indicating that printing is completed (printing end signal). , Microcomputer, ROM, RAM, etc.). The control unit 21 may be configured as one function unit of the main control device 30.

  The drive pulse generator 22 generates a drive pulse for rotating a drive shaft (not shown) of the feed motor 7 at a predetermined rotation speed. Further, the drive pulse generator 22 is constituted by, for example, a separately-excited oscillation circuit or the like, and can adjust the drive pulse to a desired pulse speed based on the oscillation control signal from the controller 21.

  The driver 23 controls the rotation of the drive shaft of the feed motor 7 based on the drive pulse and the control signal from the control unit 21.

  In response to a calculation command signal from the control unit 21, the required pulse number calculation unit 24 has a predetermined position on the conveyance (card feed) path from the current position (for example, 8 mm from the central axis of the roller shaft 5 toward the card drawing direction). The number of pulses required for transporting the time card 2 to the position) is calculated according to the pulse speed of the drive pulse generated by the drive pulse generator 22. Then, the calculation result is notified to the control unit 21.

  The pulse counter 25 counts the number of drive pulses generated by the drive pulse generator 22 based on the count start signal from the controller 21. Then, the control unit 21 is notified of the count value.

  A processing procedure related to card feeding control performed by the stepping motor control device 20 configured as described above will be described with reference to the flowchart of FIG.

  The card feed control process is started when the time card 2 is inserted into the card insertion slot 3 of the time recorder 1 and the leading end of the time card 2 reaches the detection area of the card detection sensor 4. More specifically, the detection is started by inputting a detection signal from the card detection sensor 4 that detects the leading end of the time card 2 to the control unit 21.

  First, the control unit 21 sends an oscillation start signal for the pull-in drive pulse to the drive pulse generation unit 22. When the drive pulse generator 22 receives the oscillation start signal from the controller 21, the drive pulse generator 22 generates a pull-in drive pulse having a predetermined pulse speed. In addition, the control unit 21 sends a pull-in drive control signal to the driver 23. The driver 23 that has received the pull-in drive control signal supplies the pull-in drive pulse sent from the drive pulse generator 22 to the feed motor 7 (step S301).

  When the pull-in drive pulse is supplied to the feed motor 7, the card feed mechanism (in this embodiment, the roller shaft 5, the feed rollers 6a and 6b) is driven, and the pull-in of the time card 2 is started. Specifically, a drive shaft (not shown) of the feed motor 7 rotates, and the driving force generated by the rotation is transmitted to the roller shaft 5 via the timing belt 8. Then, the rotation of the roller shaft 5 starts, and the inserted time card 2 is drawn into the inside by the feed rollers 6a and 6b.

  Thereafter, when the leading end of the time card 2 reaches the maximum retracted position (that is, the lowest point) (YES in step S302), the card detection sensors 9a and 9b detect this and send a detection signal to the control unit 21. To do. When the control unit 21 receives the detection signals from the card detection sensors 9 a and 9 b, it sends an oscillation stop signal to the drive pulse generation unit 22. Thereby, the supply of the driving pulse for drawing is stopped (step S303), and the drawing process of the time card 2 is stopped.

  While the pull-in process of the time card 2 is stopped, the print position information is notified from the main control device 30 to the control unit 21 (the specification notified before the stop may be used). Next, the control unit 21 performs control to raise the time card 2 to a position (printing position) where printing is performed in a predetermined printing field of the time card 2 based on the printing position information.

  Specifically, the control unit 21 sends an oscillation start signal for the pulling drive pulse to the drive pulse generating unit 22. When the drive pulse generator 22 receives the oscillation start signal from the controller 21, the drive pulse generator 22 generates a pull-up drive pulse. In addition, the control unit 21 sends a pulling drive control signal to the driver 23. Upon receiving the pulling drive control signal, the driver 23 controls the feed motor 7 so that the rotation direction of the drive shaft of the feed motor 7 is reverse to that during pulling, and the pulling drive sent from the drive pulse generator 22. A pulse is supplied to the feed motor 7 (step S304).

  When the pulling drive pulse is supplied to the feed motor 7, the drive shaft of the feed motor 7 rotates in the direction opposite to that during pulling, and the roller shaft 5 also rotates in the direction opposite to that during pulling. Therefore, the time card 2 is pulled up.

  Thereafter, when time card 2 is pulled up to the printing position (YES in step S305), control unit 21 sends an oscillation stop signal to drive pulse generation unit 22. Thereby, the supply of the driving pulse for raising is stopped (step S306), and the raising of the time card 2 is stopped.

  While the pulling is stopped, predetermined information (for example, attendance information) is written in the printing field of the time card 2 by a printing unit (not shown) (printing process). When this printing process is completed (YES in step S307), a printing end signal is sent from the main controller 30 to the control unit 21.

  Upon receiving the print end signal from the main control device 30, the control unit 21 sends an oscillation start signal for the first drive pulse that is a discharge drive pulse to the drive pulse generation unit 22. When receiving the oscillation start signal from the control unit 21, the drive pulse generator 22 generates a first drive pulse (for example, 600 pps (pulse per second)). In addition, the control unit 21 sends a discharge drive control signal to the driver 23. The driver 23 that has received the ejection drive control signal supplies the first drive pulse sent from the drive pulse generator 22 to the feed motor 7 (step S308). In this way, the first drive pulse is supplied to the feed motor 7 by the control unit 21, the drive pulse generation unit 22, and the driver 23.

  When the supply of the first drive pulse is started, the rotation of the roller shaft 5 starts, and the time card 2 is conveyed toward the card insertion port 3 to be discharged by the feed rollers 6a and 6b.

  Further, the control unit 21 sends a calculation command signal to the required pulse number calculation unit 24 at the same timing as sending the oscillation start signal for the first drive pulse to the drive pulse generation unit 22. When the required pulse number calculation unit 24 receives the calculation command signal from the control unit 21, the required pulse number calculation unit 24 calculates the number of pulses (required pulse number) required for the insertion side tip of the time card 2 to reach a predetermined position on the transport path. Calculate (step S309).

  The predetermined position is a point (deceleration position) that is set in advance for the purpose of stabilizing the discharge of the time card 2 and decelerates the conveyance (card feed) speed of the time card 2. The deceleration position is set to a position just before the time card 2 is removed from the feed rollers 6a and 6b (for example, a position 8 mm from the center axis of the roller shaft 5).

  The required pulse number calculation unit 24 is based on the current position information (print position information notified from the main control device 30) acquired from the control unit 21, the information on the deceleration position, and the pulse speed of the first drive pulse. Then, the required number of pulses is calculated, and the calculation result is notified to the control unit 21.

  Further, the control unit 21 sends a count start signal to the pulse counter 25 at the same timing as sending the calculation command signal to the required pulse number calculation unit 24. When receiving the count start signal from the control unit 21, the pulse counter 25 starts counting the first drive pulse generated by the drive pulse generating unit 22 (that is, counting the number of pulses) (step S310).

  When card feeding for discharging the time card 2 is started as described above, the control unit 21 calculates the required pulse number calculated by the required pulse number calculation unit 24 and the pulse number counted by the pulse counter 25. To determine whether or not the insertion-side tip of the time card 2 has been transported to the deceleration position (step S311).

  As a result of the above determination, when the insertion side tip of the time card 2 has reached the deceleration position (YES in step S311), the control unit 21 sends an oscillation start signal for the second drive pulse to the drive pulse generation unit 22. Send it out. When the drive pulse generator 22 receives the oscillation start signal from the controller 21, the drive pulse generator 22 generates a second drive pulse (for example, 300 pps) having a pulse speed slower than that of the first drive pulse. The driver 23 supplies the second drive pulse sent from the drive pulse generator 22 to the feed motor 7 (step S312).

  When the supply of the second drive pulse is started, the rotational speed of the drive shaft (not shown) of the feed motor 7 is reduced, and the card feed (conveyance) speed is also reduced. Thereafter, when the time card 2 is detached from the feed rollers 6 a and 6 b and is also removed from the detection area of the card detection sensor 4, the card detection sensor 4 sends an undetected signal to the control unit 21. When the control unit 21 receives the non-detection signal from the card detection sensor 4, it determines that the discharge of the time card 2 has been completed (YES in step S 313), and sends an oscillation stop signal to the drive pulse generation unit 22. As a result, the supply of the second drive pulse is stopped (step S314), and the drive of the card feed mechanism (roller shaft 5, feed rollers 6a and 6b) is stopped. This is the end of the card feed control process.

  As described above, in the card feed control for discharging the time card 2, the stepping motor control device 20 according to the present embodiment first supplies the first drive pulse to the feed motor 7 to increase the speed. The time card 2 is conveyed, and at the point (deceleration position) just before the time card 2 is ejected, the second drive pulse is supplied to the feed motor 7 to decelerate the conveyance speed. Thereby, while carrying out high-speed card feeding (conveyance), excessive momentum at the time of discharge can be suppressed, and the time card 2 is stably discharged.

  The stepping motor control device according to the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

  For example, in the above-described embodiment, the required pulse number calculated by the required pulse number calculation unit and the pulse counter count whether or not the insertion-side tip of the time card 2 has reached the deceleration position (processing in step S311). However, the method for determining whether or not the insertion side tip of the time card 2 has reached the deceleration position is not limited to this. For example, based on the pulse speed of the first drive pulse, a time calculation unit that calculates the time required for the leading end of the insertion side of the time card to reach the deceleration position, and a first to the feed motor (stepping motor) A timer for measuring the supply time of one drive pulse, and determining whether or not the vehicle has reached the deceleration position based on the calculation result of the required time calculation unit and the time measurement result of the timer.

  In addition, a card detection sensor such as an optical sensor may be arranged in the vicinity of the deceleration position, and the specification for determining whether or not the vehicle reaches the deceleration position may be made based on a signal (undetected signal) from the card detection sensor. In this case, when the insertion end of the time card is removed from the detection area of the card detection sensor (that is, when the time card is not detected), a signal indicating this (undetected signal) is sent to the stepping motor control device. It is sent to the control unit. And the control part which received the said non-detection signal from the said card | curd detection sensor determines with the insertion side front-end | tip part of a time card having reached the deceleration position.

It is a figure which shows schematic structure of the time recorder which concerns on one Embodiment of this invention. FIG. 3 is a block diagram showing an internal configuration of a stepping motor control device in the same embodiment. In the same embodiment, it is a flowchart which shows the process sequence of card | curd feed control by a stepping motor control apparatus.

DESCRIPTION OF SYMBOLS 1 Time recorder 2 Time card 3 Card insertion slot 4, 9a, 9b Card detection sensor 5 Roller shaft 6a, 6b Feed roller 7 Feed motor 8 Timing belt 20 Stepping motor control device 21 Control part 22 Drive pulse generation part 23 Driver 24 Required pulse number Calculation unit 25 Pulse counter 30 Main controller

Claims (5)

In the control device of the stepping motor that drives the card feeding mechanism,
The first driving pulse is supplied to the stepping motor from the start of the card feed for discharging the card until the leading end of the insertion side of the card reaches the predetermined position, and after reaching the predetermined position, Drive pulse supply means for supplying a second drive pulse having a pulse speed slower than that of the first drive pulse to the stepping motor,
A stepping motor control device characterized by the above. A requirement to calculate the number of pulses required for the insertion side tip of the card to reach the predetermined position based on the pulse speed of the first drive pulse when starting the card feed for ejecting the card A pulse number calculating means;
A pulse counter that counts the number of pulses of the first drive pulse supplied to the stepping motor;
Whether or not the predetermined position has been reached is determined based on the calculation result of the required pulse number calculating means and the counting result of the pulse counter.
The stepping motor control device according to claim 1. Time required to calculate the time required for the insertion side tip of the card to reach the predetermined position on the basis of the pulse speed of the first drive pulse when starting card feeding for discharging the card A calculation means;
A timer for measuring the supply time of the first drive pulse to the stepping motor,
Whether or not the predetermined position has been reached is determined based on a calculation result of the required time calculation means and a time measurement result of the timer.
The stepping motor control device according to claim 1.   A time recorder comprising the stepping motor control device according to any one of claims 1 to 3. Computer
The first driving pulse is supplied to the stepping motor that drives the card feeding mechanism from the start of the card feeding for ejecting the card until the leading end of the insertion side of the card reaches the predetermined position. After arriving, it functions as a drive pulse supply means for supplying the stepping motor with a second drive pulse whose pulse speed is slower than that of the first drive pulse.
A computer program characterized by the above.

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