CN101172309B - Miter saw for displaying angle of cutter blade cutting workpiece - Google Patents
Miter saw for displaying angle of cutter blade cutting workpiece Download PDFInfo
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Abstract
A miter saw for displaying angle of a cutter blade cutting the workpiece. The miter saw has a base mounting a workpiece thereon, a movable member movably supported to the base, and a cutting unit connected to the movable member for supporting the cutter blade. A positioning portion is associated with the movable member and provides a predetermined nominal position of the movable member with respect to the base. The predetermined nominal position includes a reference position and other positions labeled angle. A detector detects the position of the movable member with respect to the base. A processor sets an angle between the reference position and the predetermined nominal position as a displayed moving amount when the movable member is positioned at the predetermined nominal position. Otherwise, the processor computes the moving amount based on the output signal from the detector.
Description
The application is that application number is 200410083388.2 the Chinese invention patent application (applying date: on October 8th, 2004; Invention and created name: the dividing an application mitre saw of angle that is used to show the blade of cut workpiece).
Technical field
The present invention relates to a kind of mitre saw, this mitre saw can be adjusted the angle of circular saw blade with respect to the angle of its base adjustment circular saw blade and with respect to the baffle plate that is fixed to base.
Background technology
Traditional mitre saw comprises the base that is used for supporting workpiece, be used for supporting the blade portion of circular saw blade rotationally and be used for supporting pivotly around the pivot with the substantially parallel axes of circular saw blade the support unit of circular saw blade.Support unit can tilt with respect to base, thereby can adjust the angle that side and base top surface by circular saw blade form.
And if the turntable that mitre saw is provided with base is used for supporting workpiece, then this turntable links to each other with support unit, thereby the side of adjustable full circle shape saw blade is with respect to the angle of base top surface.
And; When with respect to the angle of the adjustable full circle shape of the contact-making surface of the baffle plate that is fixed to base saw blade side; Be used for pivotly that the support member of supporting blade portion links to each other with the turntable that is arranged on rotationally on the base top surface, the rotating shaft of platform is rotated thereby support member can rotate.
The user of mitre saw can in an inclined direction cut the workpiece that is supported on the base top surface with respect to the angle of base top surface through the side of adjustment circular saw blade.And the user can pass through the angle of the side of adjustment circular saw blade with respect to the baffle plate contact-making surface, vertically with respect to the mode cut workpiece of the side surface of workpiece relative with the baffle plate contact-making surface to tilt.The user carries out these adjustment, and with reference to the graduated scale that is arranged on integratedly on support unit and base or the turntable, said graduated scale is used to represent gradient and swing simultaneously.Therefore, the user of this type mitre saw can know inclination angle and corner through watching graduated scale.Yet, know inclination angle and corner at once and be not easy.And, because spatial constraints, to being engraved in the limited amount system of the angle value on the graduated scale.Therefore, the angle value on being engraved in graduated scale, the user is difficult for knowing the current inclination angle and the angle value of corner at once that this causes the potential decline of operating efficiency.
Japanese unexamined patent No.2000-254817 has disclosed a kind of mitre saw, and said mitre saw has the surfaces of revolution that is used to detect circular saw blade with respect to the checkout gear of the corner of base and the display that is used to show the angle that checkout gear thus detects.
The mitre saw that discloses at japanese unexamined patent No.2000-254817 has the detection axle that links to each other with rotating shaft, and the surfaces of revolution and the corner that detects axle of circular saw blade supported in said rotating shaft.Therefore, mitre saw detects corner through the corner that uses for example rotary encoder calculating to detect axle, and shows said detected corner.
Above-mentioned mitre saw detects the inclination angle of the surfaces of revolution of circular saw blade with respect to base top surface, and on display, shows this detected angle, makes the user can know current inclination angle at once.Yet the inclination angle that is shown is always detected based on initial reference position.Similarly, turntable always detects and demonstration based on initial reference position with respect to the corner of base.
Usually, mitre saw is configured to make position and the bracing or strutting arrangement mechanical engagement of base or turntable with fixing circular saw.Therefore, the side of circular saw can form right angle (the most frequently use position) or form 45 ° inclination angle (second the most often the position of use) with base top surface with base top surface.
A part of mechanical engagement that mitre saw also is configured so that base and turntable together with fixing turntable with respect to the turned position of base.Therefore, the side of circular saw blade can form right angle (position of the most frequently using) or form the inclination angle (second the most often the position of use) of 15 °, 30 °, 45 ° or 60 ° with the contact-making surface of baffle plate with the contact-making surface of baffle plate.
And, even being set, display is used to show detected angle, display is owing to fault, various condition of work or user's hobby also can not be used always.Therefore, graduated scale also usually is provided with support unit or base, to represent normally used inclination angle and corner as display.
In having the mitre saw of above-mentioned structure, always detect inclination angle and corner based on the reference point of reseting.Therefore, because it is not enough to detect the dimensional accuracy of error or mitre saw, the angle that is presented on the display always departs from angle of confirming through mechanical engagement in the pre-position or the angle of being represented by graduated scale.
For example, in the inclination maximum scope was 45 ° mitre saw, although the user tilts to 45 ° with support unit, display also can show 44 ° or 46 °.And, when base and turntable when carrying out mechanical engagement such as predetermined angulars such as 15 °, 30 °, 45 ° or 60 °, display can show with these different angles is set.When this happens, the user has been provided a plurality of values that are used for said angle, causes the confusion that can cause operating efficiency to descend.
And, even when support unit and base or turntable in the precalculated position during mechanical engagement, undesirable change appears in the angle that vibration or other external force also can cause being presented on the display.
If inclination angle and corner are in the scope of broadness, to detect, then the reference position of reseting detects because detected angle is based on always, so the error of detected angle maybe be bigger.Therefore, be difficult to show the accurate angle of inclination angle and corner.
Summary of the invention
Consider the problems referred to above, an object of the present invention is to provide a kind of mitre saw that suitable angle information can be provided to the user.
Another object of the present invention provides a kind of mitre saw that can during angle adjustment, reduce the error in the detection angles.
The present invention provides a kind of mitre saw, comprising: the base that is used for installing workpiece above that; Be supported on the base and with respect to base displaceable member movably; Thereby link to each other with displaceable member and to be used for supporting rotationally the blade part of circular saw blade cut workpiece; Link with displaceable member and the localization part of displaceable member with respect to the predetermined nominal position of base is provided, said predetermined nominal position comprises reference position and ad-hoc location; Be used to produce the detector of expression displaceable member with respect to the output signal of the position of base; Be used to show the display of displaceable member from the amount of movement of reference position; And to be used for when displaceable member is arranged on the predetermined nominal position the angle initialization between reference position and the predetermined nominal position be the processor of amount of movement.When displaceable member was positioned at the position different with the predetermined nominal position, said processor was based on the output calculated signals amount of movement that comes self-detector.
The present invention provides a kind of mitre saw, comprising: the base that is used for installing workpiece above that; Be supported on the base and with respect to base displaceable member movably; Thereby link to each other with displaceable member and to be used for supporting rotationally the blade part of circular saw blade cut workpiece; Link with displaceable member and the localization part of displaceable member with respect to the predetermined nominal position of base is provided, said predetermined nominal position comprises reference position and ad-hoc location; Be used to produce the detector of expression displaceable member with respect to the output signal of the position of base; Be used to show the display of displaceable member apart from the amount of movement of reference position; , be used for storing the memory that the table that concerns between the output signal of predetermined nominal position and detector is provided during in the predetermined nominal position at turntable; And be used for based on the angle of the output calculated signals of coming self-detector measurement with based on the processor of measured angle from table search predetermined nominal position from the reference position.Said processor sends the data of the predetermined nominal position that expression searches to display.
Description of drawings
From below in conjunction with accompanying drawing preferred embodiment being described, it is more obvious that above and other objects of the present invention, characteristics and advantage will become, wherein:
Fig. 1 is the side view according to the mitre saw of first embodiment of the invention;
Fig. 2 is the display that uses in the mitre saw of the preferred embodiment circuit diagram with controller;
Fig. 3 is the zoomed-in view of first heeling condition of mitre saw shown in Figure 1;
Fig. 4 is the zoomed-in view of second heeling condition of mitre saw shown in Figure 1;
Fig. 5 is the amplification sectional view of first rotary state of mitre saw shown in Figure 1;
Fig. 6 is the amplification sectional view of second rotary state of mitre saw shown in Figure 1;
Fig. 7,8 and 9 is the flow chart that is used for the control operation of Fig. 2 display;
Figure 10 to 15 serves as reasons and uses the chart of the output pulse that the rotary encoder in the mitre saw in Fig. 1 produces;
Figure 16 is the side view according to the mitre saw of second embodiment of the invention;
Figure 17 is the upward view of the mitre saw among Figure 16;
Figure 18 is the part amplification inclinating view of the mitre saw among Figure 16;
Figure 19 is the side view of the mitre saw among Figure 16, and its intermediate station engages with base;
Figure 20 is the zoomed-in view of the mitre saw among Figure 16; And
Figure 21 is the side view of the mitre saw among Figure 16, and its intermediate station is removable with respect to base.
The specific embodiment
Below, will mitre saw according to the preferred embodiment of the invention be described referring to accompanying drawing.Fig. 1 illustrates mitre saw 10 according to the preferred embodiment of the invention.
As shown in Figure 1, mitre saw 10 comprises: base unit 20, and said base unit 20 is provided with in the plane, is used for wooden workpiece is supported on its end face; The cutter unit 30 that is used for cut workpiece; And support unit 40, be used for supporting cutter unit 30 by this way, thereby promptly cutter unit 30 can move to lower position cutting-out workpiece from the top position.Support unit 40 also can be with respect to the top surface inclination of base unit 20.
Oriented part 42 is formed near the end of support unit 40.On the other hand, bolt 25 is arranged near the support unit 40 on the turntable 22.In this embodiment, oriented part 42 is arranged on the support unit 40 with bolt 25, is used to limit the slant range of pivot 302 with respect to turntable 22.When support unit 40 tilts with respect to turntable 22, the head of oriented part 42 contact bolts 25.Bolt 25 tilts to surpass predetermined angular range with oriented part 42 restriction support units 40.
To describe base unit 20 in detail below.Base unit 20 also comprises rotational support unit 26, handle 27 and locking bar 28.Rotational support unit 26 is arranged on the base 21 and supports turntable 22, thereby turntable 22 can rotate with respect to base 21.Rotational support unit 26 has a plurality of recess 26a that are formed on its bottom side.Said a plurality of recess 26a is with for example setting such as 7.5 ° of predetermined spaces such as grade.
In this embodiment, recess 26a promptly 0 °, 7.5 °, 15 °, 22.5 °, 30 °, 37.5 ° and 45 °, is provided with 7.5 ° predetermined space.Recess is given the respective labels of expression since 0 ° angle respectively, for example 0 °, 7.5 °, 15 °, 22.5 °, 30 °, 37.5 ° and 45 °.
Yet, because foozle, recess 26a always be not formed in accurately equal institute's mark since 0 ° angle place.In other words, even recess 26a is labeled as 30 °, for example owing to the foozle and the accuracy of manufacture, the recess 26a that is labeled as 30 ° always is not positioned at the definite 30 ° position since 0 °.Therefore, can be arranged on any different angles position of leaving definite 30 ° of positions even be labeled as 30 ° recess 26a, for example 29.5 ° or 30.5 °, this recess is also referred to as the recess that is labeled as 30 °, and 30 ° of being considered to be positioned at since 0 ° are located.This is equally applicable to be labeled other recess of angle.The angle position of above-mentioned recess is called the predetermined nominal position in the present invention.
Below, will describe display 70 in detail referring to Fig. 2.
Fig. 2 illustrates the controller 100 that is used to control display 70.Controller 100 comprises battery 110, constant voltage circuit 120, rotational position sensor 130, obliquity sensor 140, shows and reset unit 150, microcomputer 160, memory 170, obliquity sensor 180 and rotary angle transmitter 190.
Open/close state according to the open/close state change-over switch element S1 of switch S 3 and switch element S2.In other words, when switch element S1 when closing, if user's close switch S3 and surpass predetermined value from the output voltage of battery 110, then switch element S1 is closed with switch element S2 through reseting IC 122.Therefore, electric power is supplied with microcomputer 160 from constant voltage circuit 120.At this moment, microcomputer 160 output is used to the signal that continues to supply power.
On the other hand, simultaneously switch element S1 is when opening as close switch S3, and then microcomputer 160 reacts through the signal that output is used to turn off switch element S1, stops giving microcomputer 160 to supply power.
Show that reseting unit 150 comprises resistor R 7 and R8 and limit switch LS4 and LS5.Show that reseting unit 150 is used for inclination angle that shows and/or corner are reset to zero.Reset unit 150 according to demonstration, the user can be chosen as the reference position with any angle position, to measure the angle of desired locations.Therefore, display 70 shows from reference position that the user selects to the angle of any angle position.
Memory 170 is configured to EEPROM for instance, and is used for storing from the inclination angle of microcomputer 160 outputs and the corresponding output valve of corner and inclination angle and rotary angle transmitter 180 and 190.In addition, memory 170 stores and comprises each recess 26a and from the table of the relation between the corresponding signal value of inclination angle and rotary angle transmitter 180 and 190.Said table is upgraded in the output of memory response microcomputer 160.
Reset between the outlet terminal and microcomputer 160 that IC123 is arranged on 3 terminal adjusters 121, the rudimentary signal of reseting being sent to microcomputer 160, thereby reset microcomputer 160 according to output voltage from 3 terminal adjusters 121.
Because the resistance coefficient and the angle step line synchro of potentiometer 60 and potentiometer 50 sexually revise, so linearity changes the voltage of exporting from potentiometer 60 and potentiometer 50 along with angle step.
And when support unit 40 being arranged on a plurality of predetermined inclination or one of them angle of corner, memory 170 storages show the table of the correspondence between each from the voltage of potentiometer 60 and potentiometer 50 outputs and a plurality of predetermined inclination and corner.In this embodiment, a plurality of recess 26a are formed on base 21 sides with 7.5 ° interval.Each recess 26a is corresponding to one of predetermined corner.Predetermined corner is meant 0 °, 15 °, 30 ° and 45 °, and these inclination angles are limited the normal of support unit 40 and turntable 22 end faces.
Below, the heeling condition of mitre saw 10 will be described referring to Fig. 3 and Fig. 4.
In Fig. 3, support unit 40 is arranged on and the rectangular position of base 21 end faces, and the side of blade 31 is positioned at and the rectangular position of base 21 end faces equally.In this embodiment, the above-mentioned orientation of support unit 40 is corresponding to the reference position.In Fig. 4, support unit 40 is positioned at the inclination maximum place apart from the reference position, thereby the normal direction of the side of blade 31 and base 21 end faces forms 45 ° angle.
Like Fig. 3 and shown in Figure 4, pin 21a links to each other with the bottom of base 21.And a plurality of recess 26a are formed in the rotational support unit 26, with a plurality of predetermined angulars of correspondence.Joint unit 29 remains among one of a plurality of recess 26a.Bolt 25 prevents the side of blade 31 from the reference position, and promptly the vertical direction in the present embodiment tilts above 45 °.Especially, bolt 25 can engage with the oriented part 42 of support unit 40, with the tilt quantity of restriction support unit 40.As shown in Figure 3, oriented part 42 contacts with each other in a side with bolt 25b when being positioned at the rectangular position of vertical direction Z in the side of blade 31.As shown in Figure 4, be positioned at apart from the inclination maximum place oriented part of vertical direction Z 42 at support unit 40 and contact with each other at opposite side with bolt 25a, thus the angle of 45 ° of the end face of the side of blade 31 and turntable 22 formation.
Like Fig. 3 and shown in Figure 4, limit switch LS2 and LS3 are arranged on the turntable 22 near bolt 25, and protrude into a little on the head of bolt 25, in order to detect maximum inclining position.As shown in Figure 4, limit switch LS2 is closed by oriented part 42a when oriented part 42a contact corresponding bolts 25a.As shown in Figure 3, when oriented part 42b contact corresponding bolts 25b, limit switch LS3 is closed by oriented part 42b.Especially, limit switch LS3 is closed when support unit is positioned at vertical reference position shown in Figure 2.And limit switch LS2 is closed when support unit 40 is positioned at 45 ° of maximum inclining positions shown in Figure 4.
Below, the rotary state of the turntable 22 in the present embodiment mitre saw 10 will be described referring to Fig. 5 and Fig. 6.
Fig. 5 illustrate be formed on base 21 in the joint unit 29 of the locking bar 28 that engages of one of recess 26a.Fig. 6 shows through to pressing down the joint unit 29 that locking bar 28 and recess 26a break away from.
Like Fig. 5 and shown in Figure 6, limit switch LS1 is arranged on the bottom surface front end place (right side among the figure) near turntable 22, and protrusion downwards.As shown in Figure 5, when locking bar 28 is set to upwards and is arranged on integratedly one of them the limit switch LS1 closure (referring to Fig. 3 and Fig. 4) when engaging of a plurality of recess 26a in joint unit 29 and the rotational support unit 26 that is formed on base 21 on the locking bar 28 through himself elastic force.Limit switch LS1 is configured to break off when locking bar 28 joint units 29 break away from recess 26a along with pushing away downwards.In this embodiment, limit switch LS1 breaks off when locking bar 28 is not in any one recess 26a.For example, this condition means that turntable 22 is outside the precalculated position of base 21.
For turntable 22 is rotated with respect to base 21, the user catches handle 27, and pushes locking bar 28 with the same hand, so that joint unit 29 and recess 26a disengaging are as shown in Figure 6.Under this state, the removable handle 27 of user is so that turntable 22 turns to desirable position around base 21.
Because the effect of gravity, turntable 22 are difficult for rotating with respect to base 21, even when joint unit 29 is not bonded among one of recess 26a.Therefore,, joint unit 29 still can not carry out cutting operation when engaging with recess 26a.Yet, be used for respect to base 21 fixedly another mechanism of turntable 22 can be set up, on workpiece, carry out cutting operation when not being bonded among one of recess 26a at joint unit 29.
Below, will describe referring to Fig. 7 and be used to show the inclination angle of mitre saw 10 and the process of corner.
When user's close switch S3,, the voltage of battery 110 resets IC 122 close switch element S1 after surpassing first predetermined value.Predetermined fixed voltage is imposed on microcomputer 160.Then, microcomputer 160 outputs are used to continue the signal from output port 166b power supply, thus the closure state of maintained switch element S1, and make display 70 can show (S101).
Below, microcomputer 160 is via output port 166c output signal, on display 70, to show presentation screen (S102).The possible instance of this presentation screen is the model name or the greeting of mitre saw.This screen can improve user's liking mitre saw 10.Should be pointed out that according to the application of mitre saw 10 and can omit presentation screen.Simultaneously, microcomputer 160 starts timer 164 (S103).
After in S102, showing presentation screen, microcomputer 160 confirms after timer 164 begins to calculate, whether to have passed through scheduled time t1 (S103).If there is not elapsed time t1, then the demonstration of presentation screen remains on (S104:NO) on the display 70.When in S104, confirming elapsed time t1 (S104:YES), microcomputer 160 starts the sampling timer (S105) that is used for the detection angles video data.Then, microcomputer 160 confirms after starting the sampling timer, whether to have passed through time t2 (S106).If microcomputer 160 is confirmed elapsed time t2 (S106:YES), the timer of then taking a sample is reseted and is restarted (S107).Yet if microcomputer 160 confirms not have elapsed time t2, the flow process ring returns S106, up to elapsed time t2.
Then, microcomputer 160 utilizes input port 166a to detect and resets IC 122, and definite user whether console switch S3 to close display 70 (S108).If operated switch S 3, then high signal is input among the input port 166a.Therefore, microcomputer 160 is confirmed user's console switch S3 closing display 70 (S108:YES), and microcomputer 160 via output port 166c output signal to close display 70.At this moment, microcomputer 160 supplies power to microcomputer 160 via output port 166b output signal with time-out, thus cut-off switch element S1 (S109).
If in S108 with among the low signal fan-in mouth 166a, then microcomputer 160 confirms that users do not have console switch S3 to close display 70.Then, microcomputer 160 sequential advancement are to corner step display (S110) and inclination angle step display (S111).Corner step display (S110) is used to calculate and shows the amount of spin of turntable 22 from the reference position, and promptly the reference position is to the angle of turntable 22 with respect to the actual angle position of base 21.Inclination angle step display (S111) will calculate and show the tilt quantity of support unit 40 from the vertical reference position, promptly from the vertical reference position to the angle of the turntable 22 that tilts.
The details of corner step display will be described referring to Fig. 8.Referring to Fig. 8, microcomputer 160 passes through the voltage data (S201) that A/D converter 165 receives from rotary angle transmitter 190 based on the output of potentiometer 50.
Next, read voltage data (S202) from memory 170 corresponding to the rotary angle transmitter 190 of recess 26a.Whether the output from rotational position sensor 130 is read via input port 168a, closed to confirm limit switch LS1.In other words, microcomputer 160 is based on confirming from the output of rotational position sensor 130 whether joint unit 29 remains on (S203) among one of recess 26a.
Here, the predetermined angular data corresponding to recess 26a that are stored in the memory 170 are to be respectively applied for 7.5 °, 15 °, 22.5 ° ... the output voltage of rotary angle transmitter 190.
With the aforementioned calculation of describing corner in detail.In order to calculate corner, microcomputer 160 compares various voltage datas in the memory 170 and output voltage from rotary angle transmitter 190, and selects two precalculated positions (S204) from memory 170.The precalculated position meets the following conditions.One of them be less than and near the magnitude of voltage of the output voltage of rotary angle transmitter 190 and first group of corresponding first angle position.Another be greater than and near the voltage of the output voltage of rotary angle transmitter 190 and second group of corresponding second angle position.Microcomputer 160 utilizes these two groups of data to use linear approximation method then, to calculate the amount of spin (S205) of turntable 22.Should be pointed out that except linear approximation method microcomputer can use the approximation method of any kind to obtain the amount of spin of turntable 22.Microcomputer 160 sends the data of the amount of spin that shows the turntable 22 that is calculated then and gives display 70 (S206).Microcomputer 160 advances to S110 then.
Yet, during microcomputer 160 confirms that joint unit 29 remains on corresponding to one of recess 26a that is scheduled to corner when limit switch LS1 is closure in S203.Microcomputer 160 is selected predetermined corner then the data that read from memory 170, and on display 70, shows selected corner (S208).
In order under this situation, to calculate corner, microcomputer 160 compares various voltage datas in the memory 170 and output voltage from rotary angle transmitter 190.Microcomputer 160 is selected near the predetermined angular data from the output voltage of rotary angle transmitter 190 from memory 170, and the angle of these predetermined angular data is shown as corner (S208).
After in S208, accomplishing this process, microcomputer 160 sends the output voltage of angle of rotation sensor 190 and the corresponding precalculated position (S209) in the memory 170 via output port 166a.In other words, microcomputer 160 upgrades the table (S209) of the correspondence between the corresponding output voltage that comprises precalculated position and rotary angle transmitter 190.Microcomputer 160 advances to S111 (referring to Fig. 7) then.
Below, will describe the inclination angle step display in detail referring to Fig. 9.In this step, microcomputer 160 calculates and shows the inclination angle of mitre saw 10.The voltage data (S301) that microcomputer 160 receives from obliquity sensor 180.
Then, microcomputer 160 reads the inclination data (S302) of limit switch LS2 and the position of LS3 closure when engaging with bolt 25 corresponding to oriented part 42 from memory 170.Whether expression limit switch LS2 and LS3 are that the closed output from obliquity sensor 140 is imported via input port 166a.Microcomputer 160 confirms whether oriented part 42 engages with bolt 25 and whether limit switch LS2 or limit switch LS3 are closure (S303).
When limit switch LS2 and limit switch LS3 were not closed in S216, microcomputer 160 confirmed that oriented parts 42 and bolt 25 do not engage.Microcomputer 160 uses the table at the relevant voltage that is stored in the memory 170 and inclination angle and calculates the inclination angle (S304) of support unit and at display 70 demonstration these inclination angles (S305) from the voltage of obliquity sensor 180 outputs.Microcomputer 160 advances to S112 then.
In S304; Microcomputer 160 will be stored in the memory 170 a plurality of voltage datas with compare from the output voltage of obliquity sensor 180; To select two values in a plurality of voltages from be stored in memory 170; One of them is a bit larger tham and near output voltage, and another is slightly smaller than and near output voltage.Use is corresponding to the linear approximation between the angle of the voltage of two selections, and microcomputer 160 calculates the angle (S304) that is equal to from the voltage output of obliquity sensor 180, and the inclination angle that calculates is shown as the inclination angle (S305) of support unit 40.
As limit switch LS2 or limit switch LS3 when being closed in S303, microcomputer 160 confirms that oriented parts 42 and bolt 25 engage.Microcomputer 160 reference memory 170 to be finding corresponding to the inclination angle (S306) from the voltage of obliquity sensor 180 output, and on display 70, show this inclination angle (S307).
In order under this situation, to calculate the inclination angle, the various voltage datas that microcomputer 160 will be stored in the memory 170 compare with the voltage of exporting from obliquity sensor 180.The data of microcomputer 160 from be stored in memory 170 are selected the inclination angle, and this inclination angle has been showed and the immediate voltage of exporting from obliquity sensor 180 of voltage (S306), and shown this inclination angle (S307).
After accomplishing S307, microcomputer 160 will send to memory 170 corresponding to the inclination angle from the output of obliquity sensor 180 via output port 166a, with the table in the updated stored device 170 (S308).Then microcomputer 160 advances to S112.
Then, whether the output that microcomputer 160 is reseted unit 15 via output port 166a inspection from demonstration is closure (S112) with the limit switch LS5 that confirms to be used to reset the corner that is shown.If limit switch LS5 is not closed, microcomputer 160 jumps to S116.Yet if limit switch LS5 is closed, microcomputer 160 is reset to 0 ° (S113) via output port 166c with the corner that is shown, and this reference position is switched to another reference position (S114) corresponding to the corner that is shown.Microcomputer 160 calculates the new predetermined value corresponding to recess 26a based on the corner of reseting a place, and in memory 170, stores this new angle (S115).
Then, the microcomputer 160 limit switch LS4 whether closed (S116) that confirms to be used to reset the inclination angle that is shown.If limit switch LS4 is not closed, microcomputer 160 jumps to S120.Yet if limit switch LS4 is closed, microcomputer 160 is reset to zero (S117) with the inclination angle that shows, and the vertical reference position is switched to corresponding to limit switch LS4 another reference position (S118) that is presented at the angle on the display 70 when closed.Microcomputer 160 calculates corresponding to the new inclination angle of oriented part 42 with the position of bolt 25 joints based on the inclination angle of reseting a place, and this new value is stored in (S119) in the memory 170.
In S115 and S119, through start by limit switch LS4 or LS5 show reset unit 150 after, distributes a zone different to give memory 170, with the data of storage from microcomputer 160 transmissions with the prime area.Therefore, after at least one closure of limit switch LS4 or LS5, memory 170 can store two kinds of dissimilar tables of the correspondence between the voltage data that comprises precalculated position and corner and obliquity sensor 180 and 190.
After break off giving the power supply of microcomputer 160, memory 170 can continue to store this two kinds of tables, i.e. initial table and through reseting the new table that display 70 is made.Therefore, after electric power breaks off and recloses, can be convenient to microcomputer 160 and like these two kinds of tables of use according to the user.Show and another switch that is used to recover initial table also possibly is provided, to calculate angle and not delete the new table that is stored in the memory 170 when reclosing after reseting unit 150 when electric power breaks off and starting.Utilize this configuration, the present invention can provide the angle display unit that is fit to client's needs.
Intact claim to show reset process after, computer 160 confirm from the signals of rotary angle transmitter 190 outputs whether preset time at least at interval in maintenance identical (S120).If any variation takes place during this predetermined time interval, then microcomputer 160 returns S106.
Yet, if in S120, keep identical at interval at the fixed time from the signal of rotary angle transmitter 190 output, microcomputer 160 confirm from the signals of obliquity sensor 180 outputs whether at the fixed time at interval in maintenance identical (S121).If signal changes during the said time interval, then microcomputer 160 returns S106.
Yet if in S121, do not change in the interval at the fixed time, microcomputer 160 is used to close the signal of display 70 via output port 166c output in S109.Simultaneously, microcomputer 160 is used to interrupt the signal to microcomputer 160 power supplies via output port 166b output.
In this way; If interim does not change at the fixed time; Then microcomputer 160 jumps to S109, exports the signal that is used to close display 70 via output port 166c, and is used to interrupt the signal to microcomputer 160 power supplies via output port 166b output.Use this structure, mitre saw 10 can reduce the energy consumption of battery 110, and said battery 110 is for being used for the power supply of angle display unit 70.
Although mitre saw in the above-described embodiments 10 has tilt function that is used for support unit 40 and the rotating function that is used for turntable 22, mitre saw 10 also can only be provided with one of these functions.
Angular transducer among this embodiment is configured to potentiometer 50 and 60, but is not limited to such device.For example, can be with the rotary encoder that is used to calculate corner as angular transducer.Next, with describing the process of using rotary encoder to detect the corner of turntable 22.
When using rotary encoder to detect the rotation of turntable 22, during moving 1 ° of turntable 22 revolutions, for two types pulse of 90 ° of phase phasic differences, promptly pulse A and pulse B produce 20 pulses.These pulses are used to detect the corner of turntable 22.Utilize this pulse A and B of two types of 90 ° of phase phasic differences, possibly detect turntable 22 and clockwise rotate or rotate counterclockwise.
Below be the particular instance shown in Figure 10, wherein high impulse is represented in " 1 ", the low pulse of " 0 " expression.If pulse A be 0 and pulse B be 0, and become 1 and pulse B remains 0 with afterpulse A, can confirm that then turntable 22 turns to right side among Figure 10, promptly clockwise rotates.Yet, if pulse A and B are 0, and become 1 and pulse A remains 0 with afterpulse B, can confirm that turntable 22 turns to left side among Figure 10, promptly rotates counterclockwise.
And, be that every type of A and B produce 20 pulses when turntable 22 rotates 1 °.Therefore, shown in figure 10, when turntable 22 rotates 0.05 °, be every type of A and pulse of B generation.For instance, if turntable 22 then is that every type of A and B produce 900 pulses from the position of 0 ° rotated position to 45 °.
At this moment, we will think that 0 ° is presented on the display 70, and the corner of turntable 22 also accurately is 0 °.When turntable 22 turned to the right side among Figure 10, the corner that is presented on the display 70 remained 0 °, even detect expression turntable 22 when having turned to the pulse of 0.05 ° of position when microcomputer 160.When turntable 22 is rotated further and microcomputer 160 detects expression turntable 22 when having turned to the pulse of 0.20 ° of position, microcomputer 160 increases by 0.2 ° for the value that is presented on the display 70, and display is updated to 0.2 °.When turntable 22 is rotated further and microcomputer 160 detects expression turntable 22 when having turned to the pulse of 0.30 ° of position, microcomputer 160 increases by 0.2 ° for the demonstration that is presented on the display 70, and display is updated to 0.4 °.
On the contrary, the let us hypothesis is presented on the display 70 for 0.4 °, and turntable 22 rotates to counter clockwise direction from definite 0.4 ° corner.Here, the corner that is presented on the display 70 remains 0.4 °, even detect expression turntable 22 when having turned to the pulse of 0.35 ° of position at microcomputer 160.When corner 22 continues to rotate counterclockwise and microcomputer 160 detects expression turntable 22 when having turned to the pulse of 0.30 ° of position, microcomputer 160 deducts 0.2 ° from the value that is presented on the display 70, and display 70 is updated to 0.2 °.When turntable 22 is rotated further and microcomputer 160 detects expression turntable 22 when having turned to the pulse of 0.20 ° of position, microcomputer 160 deducts 0.2 ° from the value that is presented on the display 70 once more, and display 70 is updated to 0 °.
Then, the let us hypothesis is presented on the display 70 for 14.8 °, and the corner of turntable 22 is definite 14.8 °.Turntable 22 clockwise rotates, and promptly rotate on the right side in Figure 11.When microcomputer 160 detected expression turntable 22 and turned to 14.8 ° the pulse of position, microcomputer 160 showed 15.0 ° specific corner on display 70.
When turntable 22 from then on state be rotated further, and microcomputer 160 is when detecting expression turntable 22 and having turned to 15.15 ° pulse, microcomputer 160 shows 15.2 ° on display 70.
On the contrary, the let us hypothesis is presented on the display 70 for 15.2 °, and the corner of turntable 22 is definite 15.2 °.Here, turntable 22 rotates counterclockwise, and promptly rotate in the left side in Figure 11.When microcomputer 160 detected expression turntable 22 and turned to 15.15 ° the pulse of position, microcomputer 160 showed 15.0 ° specific corner on display 70.
When from then on turntable 22 is rotated further the position, and microcomputer 160 is when detecting expression turntable 22 and having turned to 14.85 ° pulse, and microcomputer 160 shows 14.8 ° on display 70.
The let us hypothesis is presented on the display 70 for 22.4 ° now, and the corner of turntable 22 is definite 22.35 °.Turntable 22 clockwise rotates, and promptly rotate on the right side in Figure 11.When microcomputer 160 detected expression turntable 22 and turned to 22.40 ° the pulse of position, microcomputer 160 showed 22.5 ° specific corner on display 70.
When from then on turntable 22 is rotated further the position, and microcomputer 160 is when detecting expression turntable 22 and having turned to 22.60 ° pulse, and microcomputer 160 shows 22.6 ° on display 70.
On the contrary, let us hypothesis is presented on the display 70 for 22.6 °, and the corner of turntable 22 is definite 22.65 °, and turntable 22 rotates counterclockwise simultaneously, and promptly rotate in the left side in Figure 12.When microcomputer 160 detected expression turntable 22 and turned to 22.60 ° the pulse of position, microcomputer 160 showed 22.5 ° specific corner on display 70.
When from then on turntable 22 is rotated further the position, and microcomputer 160 is when detecting expression turntable 22 and having turned to 22.40 ° pulse, and microcomputer 160 shows 22.4 ° on display 70.
Then, we will suppose that 31.4 ° are presented on the display 70, and the corner of turntable 22 is definite 31.40 °, and turntable 22 clockwise rotates here, and promptly rotate on the right side in Figure 13.When microcomputer 160 detected expression turntable 22 and turned to 31.45 ° the pulse of position, microcomputer 160 showed 31.6 ° specific corner on display 70.
When from then on turntable 22 is rotated further the position, and microcomputer 160 is when detecting expression turntable 22 and having turned to 31.75 ° pulse, and microcomputer 160 shows 31.8 ° on display 70.
On the contrary, let us hypothesis is presented on the display 70 for 31.8 °, and the corner of turntable 22 is definite 31.80 °, and turntable 22 rotates counterclockwise simultaneously, and promptly rotate in the left side in Figure 13.When microcomputer 160 detected expression turntable 22 and turned to 31.75 ° the pulse of position, microcomputer 160 showed 31.6 ° specific corner on display 70.
When turntable 22 is rotated further, and microcomputer 160 is when detecting expression turntable 22 and having turned to 31.45 ° pulse, and microcomputer 160 shows 31.4 ° on display 70.
Then, we will suppose that 35.2 ° are presented on the display 70, and the corner of turntable 22 is definite 35.20 °, and will be shown in figure 14.Here, turntable 22 clockwise rotates, and promptly rotate on the right side in Figure 14.When microcomputer 160 detected expression turntable 22 and turned to 35.25 ° the pulse of position, microcomputer 160 showed 35.3 ° specific corner on display 70.
When turntable 22 is rotated further, and microcomputer 160 is when detecting expression turntable 22 and having turned to 35.35 ° pulse, and microcomputer 160 shows 35.4 ° on display 70.
On the contrary, the let us hypothesis is presented on the display 70 for 35.4 °, and the corner of turntable 22 is definite 35.40 °.Here, turntable 22 rotates counterclockwise, and promptly rotate in the left side in Figure 14.When microcomputer 160 detected expression turntable 22 and turned to 35.35 ° the pulse of position, microcomputer 160 showed 35.3 ° specific corner on display 70.
When turntable 22 is rotated further, and microcomputer 160 is when detecting expression turntable 22 and having turned to 35.25 ° pulse, and microcomputer 160 shows 35.2 ° on display 70.
Then, we will suppose that 44.8 ° are presented on the display 70, and the corner of turntable 22 is definite 44.80 °.Here, turntable 22 clockwise rotates, and promptly rotate on the right side in Figure 15.When microcomputer 160 detected expression turntable 22 and turned to 44.85 ° the pulse of position, microcomputer 160 showed 45.0 ° specific corner on display 70.
When turntable 22 is rotated further, and microcomputer 160 is when detecting expression turntable 22 and having turned to 45.15 ° pulse, and microcomputer 160 shows 45.2 ° on display 70.
On the contrary, the let us hypothesis is presented on the display 70 for 45.2 °, and the corner of turntable 22 is definite 45.20 °.Here, turntable 22 rotates counterclockwise, and promptly rotate in the left side in Figure 15.When microcomputer 160 detected expression turntable 22 and turned to 45.15 ° the pulse of position, microcomputer 160 showed 45.0 ° specific corner on display 70.
When turntable 22 is rotated further, and microcomputer 160 is when detecting expression turntable 22 and having turned to 44.85 ° pulse, and microcomputer 160 shows 44.8 ° on display 70.
Utilizing this method, when detected pulse drops in the scope of specific corner by rotary angle transmitter, is in the neighborhood at center the time with 0,15,22.5,31.6 or 45 for example, and microcomputer 160 can show this specific corner on display 70.Therefore, the user knows when turntable 22 turns to the predetermined corner such as 0,15,22.5,31.6 and 45.Can use rotary encoder to detect the inclination angle of support unit 40 similarly.
Although the inclination angle of support unit 40 can only tilt along a direction in the above-described embodiments, use the squareness position to put position as a reference, tilt function can be configured to tilt to the left and right.
In the above-described embodiments, oriented part 42 is configured to when support unit 40 is in square position or is in maximum inclining position, engage with bolt 25.Yet these joint units are also configurable to be the another position joint between square position and maximum inclining position.Under such situation, be used to export the function of signal when preferably being provided at adapter unit.
In the above-described embodiments, mitre saw 10 is provided with turntable 22 that can on base 21, rotate and the support unit 40 that is connected with base 21 via turntable 22.Yet mitre saw 10 is configurable for there not being turntable 22, thereby support unit 40 can directly link to each other with base 21.
In the above-described embodiments, retainer 32 is supported on the support unit 40 pivotly.Yet support unit 40 is configurable to be the separate type structure, wherein the part of supporting pivot 41 and retainer 32 can with part that turntable 22 or base 21 are connected on slide the side almost parallel of maintenance and blade 31 simultaneously.
Above-mentioned mitre saw 10 shows following advantage.
But mitre saw 10 angles of display and the user is confused.
Mitre saw 10 can be along cut workpiece on the direction that tilts with respect to side surface of workpiece.
When support unit or base and turntable during, possibly proofread and correct when support unit or base close turntable in the predetermined angular mechanical engagement and detect and be presented at the angle on the display by angular transducer in the predetermined angular mechanical engagement.Therefore, though at the angle deviating that detects by angular transducer through in the precalculated position when mechanical engagement and definite angle, also can reduce owing to detect the deviation of the angles of display that error causes.
When the side and the base top surface of circular saw blade meet at right angles (position of the most frequently using) or inclination maximum (45 °), confirm the position through oriented part that makes support unit and the bolted joints that is arranged on base or the turntable.And; When the side of circular saw blade and base top surface meets at right angles or during inclination maximum; Through be provided for outputing signal to the obliquity sensor of controller to circular saw blade, can solve angles of display and the difference between the definite angle through navigating to the most frequently the cutting position that uses.
When for the angle of the oriented part that makes support unit and angle position that bolt head engages is set obliquity sensor detection with in joint unit and bolt head engages the time not simultaneously, the angle position that possibly set according to detected angle adjustment.Therefore, when finding that there is deviation the angle position that sets, possibly adjust this angle position.
In angle display operation subsequently, in order to show that apart from through reseting the inclination angle and the corner of the new reference position that angles of display provides, mitre saw is configured in the precalculated position angles of display is reset to zero.Utilize this structure, the user can be set to 0 ° of position as a reference in desirable position, thereby improves operability.
Through angles of display being reset to zero, memory can store and comprise recess and from the new table of the relation between the output of sensor.Thereby after display being reset to zero, the user can select two tables of this relation of expression from memory.Therefore, can be easy to be stored into again initial 0 °, thereby improve operability with reference to angle.
Through constant voltage source is provided, possibly suppress the reduction of accuracy of detection.
Said display is arranged on the turntable front, thereby the user can watch display easily during operation.
, the angle that is shown do not change then interrupt power supply if surpassing predetermined time interval.Therefore, possibly reduce power consumption, this is especially effective when power supply is battery.
When battery was used as power supply, display can unrestrictedly be installed in almost any position.Power supply is used for the complicated wiring of cutter unit requirement, and battery makes display can be easy to be installed on base or the turntable simultaneously, and this has improved the readability of display unit.
After power supply is connected first, show in the given time with angle to show that irrelevant demonstration (for example product model title or greeting) can improve the good opinion of user to product.
Turntable and base are configured to 0 ° of position (position of the most frequently using) to engage and can improve operability.
At the predetermined angular position place that the most frequently uses a plurality of grooves being set can boost productivity.And possibly be presented at when detecting control lever and groove joint does not have the angle of change, thereby prevents that productivity ratio from descending.
Needn't form recess 26a with fixed intervals.
Another embodiment of mitre saw 10 then, will be described below.In this embodiment, only mitre saw 10 has and the above-mentioned first embodiment various structure.Therefore, with the explanation of omitting to display 70 and controller 100.
Shown in figure 16, mitre saw 10 comprises base 301 and the turntable 302 that is embedded in base 301 centers, thereby shown in figure 16, the end face of turntable 302 flushes with the end face of base 301, and can in horizontal plane, rotate.Be placed on base 301 and turntable 302 end faces by wooden workpiece P.
Shown in figure 17, base 301 comprises sidewall 301a and 301b.A plurality of arc-shaped concave 303 are formed in the inboard of sidewall 301a.Brake 304 is contained in one of recess 303.Shown in Fig. 18, brake 304 is supported on and covers on 305.Brake 304 has the limit switch LS10 that is arranged on its tip.The limit switch LS10 (not shown) that links to each other with controller 100.Brake spring 306 is along pushing away brake 304 from the outside direction of the center of rotation of turntable 302, so that brake 304 fits into one of recess 303.Shown in Figure 18 and 19, handle 307 distortion ground fits into the protruding end of turntable 302, and this end that can be through being arranged on handle 307 spools 308 push away base 301 sidewall 301b.Through binding lever 307, so that axle 308 is pressed sidewall 301b, restriction turntable 302 rotates about base 301.
The control lever axle 309 that operating parts 310 extends through the axle that is orthogonal to handle 307 is supported near the turntable 302 the handle 307 rotationally.Operating parts 310 is included in the handle 307 following 310a of control lever portion that extend.The user can be with the same hand operated control lever 310a of portion that catches handle 307.
Protuberance 310c is formed on the operating parts 310, and is relative with the 310a of bar portion symmetry with respect to bar axle 309 basically.Slotted hole 310d passes protuberance 310c and forms, and processes and have a hole and the larger-diameter hole than minor diameter, these two holes side by side and fluid be communicated with.Pin 311 patchhole 310d and remaining in the turntable 302, thus can endwisely slip at it.Pin 311 comprises small diameter portion 311a and major diameter part 311b.Spring 312 promotes pin 311, makes small diameter portion 311a be arranged in the protuberance 310c of operating parts 310, and supports above that, and makes at least one end of major diameter part 311b protrude into the outside of turntable 302.
Shown in figure 20, elongated slot 302a is formed on the rear portion of turntable 302, is positioned at the center on the retainer axle 314.Clamping bar 316 passes groove 302a, and the threaded portion (not shown) that is formed on the end of clamping bar 316 screws in the screwed hole in the back surface that is formed on retainer 315.When clamping bar 316 unclamped, retainer 315 can tilt with respect to retainer axle 316 in the scope of groove 302a.During tension clamping bar 316, turntable 302 is clamped between clamping bar 316 and the retainer 315, thereby, retainer 315 is fixed on ideal position.The size of groove 302a enough makes retainer 315 tilt about 45 °.
When retainer 315 was erect with the right angle with respect to turntable 302, the through hole 315a that is formed on two positions through retainer 315 tops was parallel to the end face of turntable 302.In these through holes 315a, be provided with sliding part keeper (not shown), two guide posts 317 that left and right directions extends parallel to each other were inserted through hole 315a.Guide post 317 can pass through the sliding part keeper and slide at the end face that fore-and-aft direction is parallel to turntable 302.Circular saw retainer 318 is arranged on the front end of guide post 317, is used to prevent that guide post 317 is arranged on the rear end of guide post 317 from the support portion 319 that through hole 315a comes out.Handle 320 is arranged on the side of retainer 315, is used for restricted guidance bar 317 and slides.
Circular saw portion 322 via axle 321 pivotal support at the top of circular saw container, can be on the end face of base 301 pivoted up and down.Spring 323 is arranged between circular saw retainer 318 and the circular saw portion 322, is used for upwards pressing circular saw portion 322.
Circular saw portion 322 rotatably supports saw blade bar 324, is used for fixing saw blade 334.Circular saw portion 322 also disposes: electric motor units 325 is used to produce the locomotivity at the top that is bonded to saw blade bar 324; And handle 326.
The operation of the brake gear that in mitre saw of the present invention, uses then, will be described with reference to Figure 17 and 18.
Shown in Figure 17 and 18, by the pressure of brake spring 306, brake 304 is in the inboard state of contact with inwall 1a.When turntable 302 rotated, in brake 304 and the recess 303 was corresponding, shown in figure 17, prevented turntable 302 transition rotation.In addition, when engaging for one in brake 304 and the recess 303, brake 304 most advanced and sophisticated limit switch LS 10 are closed, and make controller 100 can detect brake 304 and engage with recess 303.Be further rotating table 302, the user must be to the 310a of upper push-rod portion.Through this operation, operating parts 310 rotations make the center of rotation impeller-hub 313 of lug boss 310b towards turntable 302.Axle 313 promotes the lug boss 304a of brake 304, and brake 304 overcomes the pressure of brake spring 306, is pushed out recess 303, thereby, discharge the constraint that restriction turntable 302 rotates.When keeping this state, turntable 302 can be rotated.
In order to limit the rotation of turntable 302 once more, the handle on user's releasing operation spare 310 makes brake spring 306 that brake 304 is pressed in the recess 303 backward, thus the rotation of restriction turntable 302.Thereby,, be necessary upwards pulling process spare 310 for rotating table 302.
Below, the operation that turntable 302 is freely rotated explanation.Shown in figure 21, the pressure that the user is upwards risen the 310a of bar portion and made pin 311 resist spring 312 moves, with the major diameter part with major diameter part 311b patchhole 310d.Through at this state releasing operation spare 310, the pressure of brake spring 306 makes the inwall of major diameter part 311b contact hole 310d of pin 311.The frictional force restriction pin 301 that contact is produced moves, thereby makes operating parts 310 be in its state that upwards rises (pin 311 is in the position of bonding station).Because brake 304 does not insert recess 303 at this state, the brake gear of turntable 302 can be maintained at release conditions, just, and unlocked state.
A more coarse handling procedure in outer surface through making major diameter part 311b and the inner surface of hole 310d; Increase the frictional force between two surfaces; Can more easily keep this unlocked state, thereby reduce unlocked state by the chance that discharges suddenly.
In order to make turntable 302 be fixed on desirable turned position, binding lever 307 promotes sidewall 301b through axle 308.
Be used for limiting the brake gear that turntable 302 rotates in order to engage once more; Just; In order to discharge unlocked state, operating parts 310 is temporarily upwards drawn, and freely turns round between the large diameter hole in pin 311 and hole 310d; Make the pressure through spring 312 that pin 311 is moved, thus the hole 310d that makes small diameter portion 311a be arranged in to be formed on lug boss 310c.Now, according to above-mentioned normal running (pin 311 is in unengaged position), operating parts 310 can rotate once more, and brake gear works.
Although specified the present invention with reference to embodiments of the invention, to those skilled in the art, can carry out various modifications and change to the present invention, and not depart from spirit of the present invention, scope of the present invention is limited appended claim.
Claims (8)
1. mitre saw comprises:
Be used for installing the base of workpiece above that;
Be supported on the said base and with respect to said base displaceable member movably;
The blade part, said blade partly is connected to said displaceable member, is used for the rotatable circular saw blade that supports to cut said workpiece;
Localization part, said localization part link to each other with said displaceable member and the predetermined nominal position of said displaceable member with respect to said base are provided;
Detector, said detector are used for producing the output signal, and the said displaceable member of said output signal indication is with respect to the position of said base;
Display, said display are used to show that said displaceable member leaves the amount of movement of reference position; And
Processor; Said processor is used for when said displaceable member is positioned at the predetermined nominal position; With the angle initialization between said reference position and the said predetermined nominal position is said amount of movement, and when said displaceable member was positioned at the position that is not the predetermined nominal position, said processor was according to the said amount of movement of output calculated signals from said detector; Said processor will represent that the data of said amount of movement send to said display, wherein
Said displaceable member is rotatably supported and utilizes the said base turntable that said workpiece is mounted thereto by said base;
Handle is used for respect to the base rotating table; And
Said display is arranged on the front of turntable.
2. mitre saw according to claim 1, wherein, said detector comprises:
Position sensor, said position sensor are used for confirming whether said displaceable member is positioned at said predetermined nominal position;
Angular transducer, said angular transducer are used to detect the angle position of said displaceable member with respect to said base; Said mitre saw also comprises:
Memory, said memory is used for the storage table, and said table comprises one group of said predetermined nominal position and corresponding output signal value when said displaceable member is positioned at said predetermined nominal position.
3. mitre saw according to claim 2 also comprises: baffle plate, said baffle plate are fixed on the said base and have and be used for the contact-making surface that contacts with said workpiece, and
Wherein said amount of movement is the amount of spin that said turntable leaves said reference position.
4. mitre saw according to claim 3; Wherein, Be positioned at the position that is not said predetermined nominal position when said turntable; And when said processor receives from the output signal value of said angular transducer; Said processor is searched for first group of first output signal value and corresponding position from said table, and said first output signal value is big and approaching said output signal value than said output signal value, and said processor is searched for second group of second output signal value and corresponding position from said table; Said second output signal value is little and approaching said output signal value than said output signal value, and said processor utilizes said first group of first output signal value and second group of second output signal value to calculate the said amount of spin of said turntable through using approximation method.
5. mitre saw according to claim 3; Wherein said base has workpiece and is installed to the upper surface on it; Said turntable is around the rotating shaft rotation perpendicular to said base upper surface, and said angular transducer is arranged in the space between said turntable and the said rotating shaft.
6. mitre saw according to claim 3, wherein when said position sensor detected said turntable and is positioned at said predetermined nominal position, the angle between said reference position of said processor and the said predetermined nominal position was set to said amount of spin.
7. mitre saw according to claim 3; Wherein when said position sensor detected said turntable and is positioned at said predetermined nominal position, the output signal value of the said angular transducer that said processor will combine with said predetermined nominal position sent to said memory.
8. the side that mitre saw according to claim 3, wherein said circular saw blade have rotating shaft and extend perpendicular to said rotating shaft, and
Wherein said turntable has and is used for the junction surface that engages with said base; So that the lateral vertical of said circular saw blade is in the contact-making surface location of said baffle plate; When said junction surface engaged with said base, said position sensor detected said turntable and is positioned at said reference position.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003350157 | 2003-10-08 | ||
| JP2003-350157 | 2003-10-08 | ||
| JP2003350157A JP4683368B2 (en) | 2003-10-08 | 2003-10-08 | Tabletop circular saw |
| JP2004217997 | 2004-07-26 | ||
| JP2004217997A JP4662299B2 (en) | 2004-07-26 | 2004-07-26 | Tabletop cutting machine |
| JP2004-217997 | 2004-07-26 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100833882A Division CN100382920C (en) | 2003-10-08 | 2004-10-08 | Miter saw for displaying angle of cutter blade cutting workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101172309A CN101172309A (en) | 2008-05-07 |
| CN101172309B true CN101172309B (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101934598A Expired - Fee Related CN101172309B (en) | 2003-10-08 | 2004-10-08 | Miter saw for displaying angle of cutter blade cutting workpiece |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4683368B2 (en) |
| CN (1) | CN101172309B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4434126B2 (en) | 2005-10-19 | 2010-03-17 | 日立工機株式会社 | Desktop cutting machine and cutting angle display device for desktop cutting machine |
| JP5376208B2 (en) * | 2009-01-20 | 2013-12-25 | 日立工機株式会社 | Electric drilling tool |
| TWI413755B (en) * | 2010-12-17 | 2013-11-01 | Univ Nat Taiwan Science Tech | Automated optical inspection system for the runout tolerance of circular saw blades |
| US8621970B2 (en) * | 2011-01-03 | 2014-01-07 | Robert Bosch Gmbh | Miter saw with adjustable fence |
| CN103056672A (en) * | 2013-02-03 | 2013-04-24 | 侯如升 | Detachable positioning seat for boring machine |
| DE102013202754A1 (en) * | 2013-02-20 | 2014-08-21 | Hilti Aktiengesellschaft | Device for separating a workpiece along a parting line |
| CN104441081B (en) * | 2014-11-12 | 2016-09-07 | 嘉善于王家具有限公司 | A kind of adjustable timber milling machine |
| CN106735539A (en) * | 2016-12-08 | 2017-05-31 | 无锡市彩云机械设备有限公司 | A kind of high efficiency cutting machine |
| CN118321991B (en) * | 2024-06-17 | 2024-09-06 | 酷佧切削技术(四川)有限公司 | Intelligent monitoring system and method for operation safety of automatic cutting machine |
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| US4641557A (en) * | 1984-12-26 | 1987-02-10 | Emerson Electric Co. | Electronically controlled power saw |
| US4754276A (en) * | 1985-12-30 | 1988-06-28 | Schaevitz Sensing Systems, Inc. | System to display sawblade angle and height |
| DE19832984A1 (en) * | 1997-07-22 | 1999-01-28 | Makita Corp | Circular saw with bench |
| JP2000254817A (en) * | 1999-03-05 | 2000-09-19 | Makita Corp | Bench circular sawing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH085767A (en) * | 1994-06-16 | 1996-01-12 | Nikon Corp | Drive table |
| JP4539197B2 (en) * | 2004-06-30 | 2010-09-08 | 日立工機株式会社 | Tabletop cutting machine |
-
2003
- 2003-10-08 JP JP2003350157A patent/JP4683368B2/en not_active Expired - Lifetime
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- 2004-10-08 CN CN2007101934598A patent/CN101172309B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4641557A (en) * | 1984-12-26 | 1987-02-10 | Emerson Electric Co. | Electronically controlled power saw |
| US4754276A (en) * | 1985-12-30 | 1988-06-28 | Schaevitz Sensing Systems, Inc. | System to display sawblade angle and height |
| DE19832984A1 (en) * | 1997-07-22 | 1999-01-28 | Makita Corp | Circular saw with bench |
| JP2000254817A (en) * | 1999-03-05 | 2000-09-19 | Makita Corp | Bench circular sawing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4683368B2 (en) | 2011-05-18 |
| JP2005111855A (en) | 2005-04-28 |
| CN101172309A (en) | 2008-05-07 |
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