JP2006062027A - Cutting plotter and method of cutting media by using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting plotter capable of exactly cutting media to be cut into desired shapes by a cutter held on a head. <P>SOLUTION: As a distance T from a first driving motor 50 or/and a second driving motor 60 for relatively moving the head 30 in an X-Y direction on an upper side of the media 20 to be cut to a cutting speed changing portion of the media 20 cut by the cutter 32 held on the head 30 becomes farther, an absolute value of relative moving acceleration of the head 30 in the X-Y direction in relation to the media 20 at the cutting speed changing portion is adjusted to be gradually smaller by using an acceleration adjusting means 70. The cutter 32 is relatively exactly followed and moved in the X-Y direction on the upper side of the media 20 mounted on a platen 10 by following after rotation angles of the first driving motor 50 and the second driving motor 60 according to cutting data stored in a storage means 40. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cutting plotter that cuts a medium to be cut mounted on a platen into a desired shape, and a cutting method that uses the plotter to cut the medium to be cut mounted on the platen into a desired shape.

Move the head above the media to be cut mounted on the platen relative to the XY directions according to the cut data stored in the storage means, and the media to be cut into the desired shape by the cutter held by the head Cutting plotters for cutting are well known.
Among the cutting plotters, in a plotter called a vertical plotter as shown in FIG. 5, the head 30 is moved in the Y (left and right) direction above the platen 10 in parallel with the platen 10 surface. . In addition, the cut medium 20 such as a plastic sheet or a cloth is moved on the platen 10 in the X (front-rear) direction along the platen 10 surface. Then, the head 30 is moved relative to the cut medium 20 mounted on the platen 10 in the XY directions.
The head 30 holds the cutter 32 so as to be movable up and down. Then, the cutter 32 held by the head 30 is lowered in the direction of the cut medium 20 mounted on the platen 10, and the head 30 is moved in the state where the tip of the cutter 32 is pressed against the cut medium 20. In this manner, the cut medium 20 is cut by the cutter 32 by moving the cut medium 20 mounted on the platen 10 relatively in the XY direction.
At that time, in accordance with the cut data stored in advance in the storage means 40 such as a host computer for driving the cutting plotter, the upper portion of the cut medium 20 on which the head 30 is mounted on the platen 10 is relatively moved in the XY direction. It is moved. The cut medium 20 is cut into a desired shape by the cutter 32.

This vertical type plotter includes a large-sized cutting plotter for cutting cloth for clothes. Among such plotters, there are large plotters whose lateral width of the platen 10 is 1 to 3 m or more.
JP 2001-009783 A

  However, when a cloth for clothes is cut using such a large plotter, the cut line often deviates greatly from the desired cut line. This tendency is caused when the head 30 is mounted on the platen 10 far away from the first drive motor 50 that moves the head 30 in the X direction and the second drive motor 60 that moves the head 30 in the Y direction. This occurred remarkably in the cut medium 20 portion such as a cloth cut by the cutter 32 held by the cutter 30. In addition, this tendency indicates that the moving speed of the head 30 is changed from zero to a steady speed of 20 mm / sec. Or, on the contrary, the moving speed of the head 30 is set to, for example, a steady speed of 20 mm / sec. As the absolute value of the moving acceleration of the head 30 at the time of decelerating from 0 to 0 increases, it occurs more remarkably.

  After pursuing the cause, I discovered that it was because of the following reasons. That is, as shown in FIG. 5, the head 30 is surrounded by a pair of left and right pulleys 64, 66 by a second drive motor 60 such as a servo motor built in a plotter body (not shown) on one side of the platen 10. This is because it is attached to a drive belt 62 made of elastic rubber or the like that circulates in the Y direction and is moved in the Y direction together with the drive belt 62. For this purpose, the rotational speed of the second drive motor 60 is increased from, for example, zero to a steady rotational speed, and the second drive motor 60 causes the traveling speed in the Y direction of the elastic drive belt 62 to be, for example, from zero to the steady speed. 20 mm / sec. Or, conversely, the rotational speed of the second drive motor 60 is lowered from, for example, a steady rotational speed to zero, and the second drive motor 60 sets the circulating speed in the Y direction of the elastic drive belt 62 to, for example, Steady speed of 20 mm / sec. When the vehicle is decelerated from zero to zero, an inertial force is applied to the elastic drive belt 62 made of rubber or the like that circulates around the pair of left and right pulleys 64, 66 in the Y direction, and the second drive motor 60 of the drive belt 62 This is because the portion of the driving belt 62 that is pulled by one side extends and the portion of the driving belt 62 that is pushed back by the second driving motor 60 of the driving belt 62 contracts. As the drive belt 62 expands and contracts, the speed at which the head 30 attached to the drive belt 62 moves in the Y direction together with the drive belt 62 at a position far from the second drive motor 60 is the second drive. This is because it rises and falls with a time delay from the speed of moving the portion near the motor 60 in the Y direction together with the drive belt 62. In other words, as the rotational speed of the second drive motor 60 increases from, for example, zero to a steady rotational speed, the moving speed in the Y direction of the drive belt 62 portion far from the second drive motor 60 becomes, for example, zero. As the rotational speed of the second drive motor 60 increases from, for example, zero to the steady rotational speed without increasing in proportion to the rotational speed of the second drive motor 60 from The moving speed in the Y direction of the portion of the driving belt 62 far away from the driving motor 60 is, for example, from zero to a steady speed of 20 mm / sec. This is because it rises with a delay in time. Or, conversely, as the rotation speed of the second drive motor 60 decreases from, for example, a steady rotation speed to zero, the movement speed in the Y direction of the portion of the drive belt 62 far from the second drive motor 60 becomes, for example, a steady state. As the rotational speed of the second drive motor 60 decreases from, for example, a steady rotational speed to zero, the second speed of the second drive motor 60 does not decrease in proportion to the rotational speed of the second drive motor 60 from the speed to zero. The moving speed in the Y direction of the portion of the driving belt 62 far away from the driving motor 60 is, for example, a steady speed of 20 mm / sec. This is because it descends in time from zero to zero. Therefore, a time delay occurs in the movement distance of the head 30 that moves the drive belt 62 part far away from the second drive motor 60 in the Y direction together with the drive belt 62. discovered. And it discovered that this tendency arises more notably in the drive belt 62 part farther away from the second drive motor 60.

  At the same time, as indicated by the alternate long and short dash line in FIG. 5, a long feed roller 52 such as 1 to 3 m or more provided in the Y direction inside the platen 10, and the feed roller 52 in the Y direction above the feed roller. A part of the cut medium 20 mounted on the platen 10 is sandwiched between the pressing roller 54 disposed so as to face the feed roller 52 and the plotter main body (not shown) on one side of the platen 10. This is because the media 20 to be cut is moved in the X direction on the platen 10 by being rotated in the X direction by the first drive motor 50 such as an electric motor built into the platen. For this purpose, the rotation speed of the first drive motor 50 is increased from, for example, zero to a steady rotation speed, and the rotation speed in the X direction of the long feed roller 52 is increased from, for example, zero to a steady speed by the first drive motor 50. When accelerated, an inertial force applied to the long feed roller 52 made of an elastic body made of metal or the like causes a portion of the feed roller 52 closer to the first drive motor 50 and a distance from the first drive motor 50. This is because a twist of a predetermined angle occurs between the feed roller 52 portion on the far side. Or, conversely, the rotation speed of the first drive motor 50 is decreased from, for example, a steady rotation speed to zero, and the rotation speed in the X direction of the long feed roller 52 is decreased from, for example, the steady speed to zero by the first drive motor 50. Even when the motor is decelerated, the inertial force applied to the long feed roller 52 made of an elastic body made of metal or the like, the portion of the feed roller 52 closer to the first drive motor 50, and the first drive motor This is because a twist of a predetermined angle occurs between the feed roller 52 portion far from 50. As a result, the feed roller 52 portion closer to the first drive motor 50 is substantially proportional to the rotation speed of the first drive motor 50 from, for example, zero to a steady speed as the rotation speed of the first drive motor 50 increases. Or, conversely, as the rotational speed of the first drive motor 50 decreases, for example, the first drive motor 50 is decelerated substantially proportionally to the rotational speed of the first drive motor 50 from the steady speed to zero. The part of the feed roller 52 far from the one drive motor 50 is delayed from the rotational speed of the first drive motor 50 in time, for example, accelerated from zero to a steady speed, or vice versa. I discovered that it was slowed down to zero. For this purpose, a part of the feed roller 52 that is far from the first drive motor 50 and the presser roller 54 above the first drive motor 50 are sandwiched and moved on the platen 10 in the X direction corresponding to the rotation direction of the feed roller 52. It has been found that a time delay occurs in the movement distance in the X direction of the cut medium 20 to be cut. And it discovered that this tendency arises more notably in the feed roller 52 part located in the other side of the platen 10 farther away from the first drive motor 50.

In order to solve such a problem, the first drive motor 50 that moves the head 30 relative to the cut medium 20 on the platen 10 in the X direction, or the medium to be cut on the platen 10. 20 It is conceivable to suppress the absolute value of the rotational acceleration of the second drive motor 60 that moves relatively upward in the Y direction.
However, in such a case, the throughput (cut processing speed) of the cutting work of the cut medium 20 by the cutting plotter is lowered, and the cut medium 20 cannot be cut efficiently and quickly by the cutting plotter.

In order to solve such problems, the drive belt 62 that moves the head 30 in the Y direction is changed to a metal wire with less stretchability, or the cut medium 20 is moved on the platen 10 in the X direction. The shaft diameter of the feed roller 52 to be increased is increased, and the twist angle of the feed roller 52 portion on the side farther from the first drive motor 50 with respect to the feed roller 52 portion on the side closer to the first drive motor 50 is kept small. A method is also conceivable.
However, when the drive belt 62 is changed to a metal wire, the slip amount of the metal wire around the pair of left and right pulleys 64 and 66 that support the metal wire so as to be circulated increases. Then, the head 30 attached to the metal wire cannot always be accurately moved in the Y direction by a desired distance by the second drive motor 60.
Further, when the shaft diameter of the feed roller 52 is increased, the weight of the feed roller 52 increases, and the power consumption of the first drive motor 50 that rotates the feed roller 52 increases, or the cost of the feed roller 52 increases. Will become bulky.

Similar to this, as shown in FIG. 6, the head 30 is moved over the cut medium 20 mounted on the platen 10 having a flat table shape according to the cut data stored in the storage means 40. This can also be said in a horizontal plotter in which the medium to be cut 20 is cut into a desired shape by the cutter 32 held by the head 30 by moving in the XY direction parallel to the surface of the platen 10.
That is, in such a horizontal plotter, the first drive motor 50 causes the first drive belt 51 made of elastic rubber or the like to circulate around the pair of front and rear pulleys 53 and 55 in the X direction so as to perform the first drive. A guide bar 80 mounted on one side of the belt 51 and facing the Y direction is translated in the X direction above the platen 10. Further, the second drive motor 60 causes the second drive belt 82 made of elastic rubber or the like to circulate around the pair of left and right pulleys 84 and 86 in the Y direction on the guide bar 80 facing the Y direction. The head 30 attached to the second drive belt 82 is moved above the platen 10 in the Y direction. Then, the head 30 is relatively moved in the XY direction above the cut medium 20 mounted on the platen 10 using the first drive motor 50 and the second drive motor 60.
For this purpose, the travel distance of the guide bar 80 that supports the head 30 that translates the first drive belt 51 portion far from the first drive motor 50 in the X direction together with the stretchable first drive belt 51 is set. A time delay has occurred. Further, there is a time delay in the moving distance of the head 30 that moves the second driving belt 82 part far from the second driving motor 60 in the Y direction together with the elastic second driving belt 82. Oops. As a result, the cut medium 20 cannot be accurately cut into a desired shape by the cutter 32 gripped by the head 30, and the cut line of the cut medium 20 is displaced or out of order.

  An object of the present invention is to provide a cutting plotter and a cutting method of a medium to be cut using the plotter, which can solve such problems.

In order to achieve such an object, the cutting plotter of the present invention moves the head relatively above the cut medium mounted on the platen in the XY directions according to the cut data stored in the storage means. In a cutting plotter that cuts the media to be cut into a desired shape by a cutter held by the head,
A cutter held by the head from a first drive motor that moves the head relative to the cut medium in the X direction and / or a second drive motor that moves the head relative to the cut medium in the Y direction. As the distance T to the cut speed change portion of the cut medium to be cut becomes longer in the X direction and / or Y direction with respect to the cut medium of the head at the cut speed change portion of the cut medium. An acceleration adjustment means for adjusting the absolute value of the relative movement acceleration gradually smaller is provided.

Further, the cutting medium cutting method of the present invention uses the cutting plotter of the present invention to place the head above the cutting medium mounted on the platen in the X and Y directions according to the cutting data stored in the storage means. A cutting method in which the media to be cut is cut into a desired shape by a cutter moved relative to the head,
The distance from the first drive motor that moves the head relative to the cut medium in the X direction using the acceleration adjusting means to the cutting speed change point of the cut medium that is cut by the cutter held by the head T or / and the distance T from the second drive motor that moves the head relative to the cut medium relative to the Y direction to the cutting speed change portion of the cut medium that is cut by the cutter held by the head. In accordance with the above, the absolute value of the relative movement acceleration in the X direction and / or the Y direction with respect to the cut medium of the head at the cutting speed change portion of the cut medium is gradually adjusted to be smaller.

  In the cutting plotter and the cutting method of the medium to be cut according to the present invention, the second drive motor rotates the drive belt in the Y direction, and moves the head mounted on the drive belt in the Y direction above the platen. The first drive motor rotates the feed roller in the X direction, and moves the medium to be cut partially sandwiched between the feed roller and the pressing roller in the X direction that hits the rotation direction of the feed roller. The present invention can be used for the above-described vertical plotter having a structure.

  In the cutting plotter and the cutting method of the medium to be cut according to the present invention, the first drive motor rotates the first drive belt in the X direction, and the guide bar is attached to the first drive belt and faces the Y direction. The head mounted on the second drive belt is moved parallel to the X direction above the platen, and the second drive motor circulates the second drive belt in the Y direction on the guide bar facing the Y direction. It can also be used in the above-described horizontal plotter having a structure for moving the plate on the platen in the Y direction.

In the cutting method of the medium to be cut using the cutting plotter having such a configuration, the distance T from the first driving motor to the cutting speed change portion of the medium to be cut and / or the second driving motor using the acceleration adjusting means. As the distance T from the cut medium to the cut speed change portion becomes longer, the relative movement of the head in the X direction and / or the Y direction with respect to the cut medium at the cut speed change portion of the cut medium The absolute value of acceleration can be adjusted gradually smaller.
That is, in the case of the above-described vertical type plotter, when the head is located at a location far from the second drive motor, the absolute value of the head moving acceleration that moves the location far from the second drive motor in the Y direction together with the drive belt. The value can be adjusted small. When the head is located far from the second drive motor, the inertial force applied to the stretchable drive belt is weakened, and the expansion / contraction amount of the drive belt moved in the Y direction together with the head is less than a certain allowable value. It can be kept small. Then, following the rotation angle of the second drive motor, the head located at a position far from the second drive motor is tracked almost accurately with the drive belt being suppressed to the extent that a time delay can be ignored in the Y direction. Can be moved. At the same time, when the head is located at a location far from the first drive motor, a part is sandwiched between the feed roller portion near the head at a location far from the first drive motor and the pressing roller, and the platen is moved over the platen. The absolute value of the moving acceleration of the cut medium moved in the X direction corresponding to the rotation direction of the feed roller can be adjusted small. And the inertial force applied to the feed roller which is an elastic body is weakened, and the twist angle with respect to the feed roller portion near the first drive motor in the feed roller portion far from the first drive motor is kept small. be able to. Then, following the rotation angle of the first drive motor, the medium to be cut that is partially sandwiched between the feed roller portion located at a location far from the first drive motor and the pressing roller is used to rotate the feed roller. It is possible to follow the movement almost accurately with the time delay in the X direction, which corresponds to the direction, being suppressed to a level that can be ignored.
In the case of the above-described horizontal plotter, when the guide bar supporting the head is located at a location far from the first drive motor, the location far from the first drive motor is translated in the Y direction together with the first drive belt. The absolute value of the moving acceleration of the guide bar to be adjusted can be adjusted small. Then, when the guide bar that supports the head is positioned far from the first drive motor, the inertial force applied to the stretchable first drive belt is weakened and moved in the Y direction together with the guide bar. The amount of expansion and contraction of the belt can be kept small below a certain allowable value. Then, following the rotation angle of the first drive motor, the guide bar that supports the head located far from the first drive motor is moved to the extent that the time delay in the Y direction can be ignored together with the first drive belt. It is possible to follow and move almost accurately with a small amount. At the same time, when the head is located at a location far from the second drive motor, the absolute value of the moving acceleration of the head that moves the location far from the second drive motor along with the second drive belt in the X direction can be adjusted small. When the head is located far from the second drive motor, the inertial force applied to the stretchable second drive belt is weakened, and the extension amount of the second drive belt that moves in the Y direction together with the head is constant. It can be kept below the allowable value. Then, following the rotation angle of the second drive motor, the head located at a position far from the second drive motor is suppressed to an extent that the time delay in the X direction can be neglected together with the second drive belt to be almost accurate. Can be moved to follow.
As a result, the head is moved above the media to be cut mounted on the platen according to the cut data stored in the storage means, following the rotation angle of the first drive motor and the second drive motor, and ignoring the time delay. It is possible to keep following movement in the XY direction relatively accurately while keeping it as small as possible. Then, the cutting medium held by the head can be cut into a desired shape almost accurately without deviation or error to the extent that the cut medium can be ignored.

Further, in the cutting method of the medium to be cut using the cutting plotter having such a configuration, the distance T or / and the second distance from the first drive motor to the cutting speed change portion of the medium to be cut using the acceleration adjusting means. As the distance T from the drive motor to the cut speed change portion of the cut medium becomes shorter, the relative of the head in the X direction and / or the Y direction with respect to the cut medium at the cut speed change portion of the cut medium. The absolute value of the moving acceleration can be gradually increased. Then, the distance T from the first drive motor to the cut speed change position of the cut medium and / or the distance T from the second drive motor to the cut speed change position of the cut medium is short. The cutting speed can be increased.
As a result, it is possible to increase the throughput of the cutting work of the media to be cut using the cutting plotter, and to shorten the total cutting time of the media to be cut.

In the cutting plotter of the present invention, the acceleration adjusting means uses the cut data stored in the storage means, and the distance T from the first drive motor to the cut speed change portion of the cut medium or / and the first data. (2) A calculation means for calculating a distance T from the drive motor to the cutting speed change portion of the cut medium, and an optimum acceleration stored in the sub storage means from the value of the distance T to the cutting speed change portion calculated by the calculation means. Deriving means for deriving the absolute value of the relative optimum movement acceleration in the X direction and / or Y direction of the head with respect to the cut medium at the cut speed change location of the cut medium following the absolute value of the change data According to the absolute value of the relative optimum movement acceleration in the X direction and / or Y direction of the head derived by the deriving means. At a cut rate Modification of Ttomedia, it is to be preferred to become the head from the head deceleration means for moving with relative acceleration or deceleration of the upper of the cut media in the X direction or / and the Y direction.
In such a case, the calculation means stores the distance T from the first drive motor to the cut speed change location of the cut medium and / or the distance T from the second drive motor to the cut speed change location of the cut media. Can be automatically calculated using the cut data stored in the. Next, using the derivation means, the value of the distance T to the cutting speed change location calculated by the calculation means is used to follow the absolute value of the optimum acceleration change data stored in the sub storage means, and the cut of the cut medium It is possible to derive the absolute value of the relative optimum movement acceleration in the X direction and / or Y direction of the head with respect to the medium to be cut at the speed change portion. Then, using the head acceleration / deceleration means, the head at the location where the cutting speed of the medium to be cut is changed in accordance with the absolute value of the relative optimum movement acceleration in the X direction and / or Y direction derived by the deriving means. The relative speed of the cut medium is accelerated in the X direction and / or Y direction, for example, from zero to a steady speed, or is decelerated relatively in the X direction or / and Y direction, for example, from the steady speed to zero. It can be moved while moving.
As a result, the head was gripped by the head from the first drive motor that moves the head relative to the cut medium in the X direction and / or the second drive motor that moves the head relative to the cut medium in the Y direction. As the distance T to the cutting speed change portion of the cut medium to be cut by the cutter increases, the head in the X direction and / or the Y direction with respect to the cut medium at the cutting speed change portion of the cut medium. The absolute value of the relative movement acceleration can be adjusted gradually smaller in accordance with the absolute value of the optimum acceleration change data stored in the sub storage means.

  Here, as the absolute value of the optimum acceleration change data stored in the sub storage means, an experimental data value obtained by actually cutting the cut medium using a cutting plotter may be used. Then, in accordance with the absolute value of the optimum acceleration change data backed up by the experimental data value, relative to the cut medium of the head in the X direction and / or the Y direction relative to the cut medium at the cut speed change position of the cut medium. It is better to adjust the absolute value of the moving acceleration to a larger or smaller value. Then, it is preferable that the medium to be cut can be accurately cut with little deviation to the extent that it can be ignored by the cutter held by the head. The absolute value of the optimum acceleration change data stored in the sub storage means is the absolute value of the relative movement acceleration of the head in the X direction and / or Y direction at the cut speed change location of the cut medium. It is preferable to set a value that is almost the upper limit that can be cut almost accurately and does not become smaller than necessary, and a value that can increase the throughput of the cutting work of the cut media using the cutting plotter as much as possible.

As described above, according to the cutting plotter of the present invention, the first drive motor for moving the head relative to the X direction relative to the cut medium or / and the head relative to the Y direction relative to the medium to be cut. There is a time delay in the moving distance of the head that moves the part far away from the second drive motor to be moved in the X direction and / or the Y direction, and the object to be cut by the cutter held by the head. It is possible to reliably prevent the cut line of the cut media from being greatly deviated from the desired cut line.
When the head is moved relative to the cut medium near the first drive motor or / and the head above the cut medium near the second drive motor in the X direction and / or Y direction, the head is cut. It is possible to increase the absolute value of the head moving acceleration at the location where the cutting speed of the medium is changed. And the throughput of the cutting work of the to-be-cut medium using a cutting plotter can be raised.

Next, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a preferred embodiment of the cutting plotter of the present invention, FIG. 1 is a plan view thereof, FIG. 2 is a front view thereof, FIG. 3 is a sectional view taken along line AA in FIG. FIG. Hereinafter, these cutting plotters will be described.

  FIGS. 1 to 4 show XY according to the cut data stored in the storage means 40 built in the host computer or the like for driving the head 30 over the cutting target medium 20 mounted on the platen 10. A cutting plotter is shown in which the medium to be cut 20 is cut into a desired shape by a cutter 32 gripped by the head 30 while being relatively moved in the direction.

Of these, FIGS. 1 to 3 show examples of vertical plotters.
In this cutting plotter, the second drive motor 60 is attached to the drive belt 62 by rotating the drive belt 62 that is looped around the pair of left and right pulleys 64 and 66 in the Y direction. The head 30 is structured to move in the Y direction over the platen 10. Further, the first drive motor 50 rotates the long feed roller 52 provided in the Y direction inside the platen 10 in the X direction, and is disposed above and above the feed roller 52 portion exposed on the upper surface of the platen 10. The cut medium 20, which is partially sandwiched between the pressing roller 54 and the platen 10, is moved on the platen 10 in the X direction corresponding to the rotation direction of the feed roller 52. The head 30 is configured to move relatively in the XY direction over the cut medium 20 mounted on the platen 10.

FIG. 4 shows an example of a horizontal plotter.
This cutting plotter has a structure in which a first drive motor 50 circulates in a X direction a first drive belt 51 that is looped around a pair of front and rear pulleys 53 and 55. A guide bar 80 mounted on one side of the first drive belt 51 and facing the Y direction is translated along the pair of left and right guide rails 92 and 94 in the X direction. Yes. Further, the second drive motor 60 causes the second drive belt 82 looped around the pair of left and right pulleys 84 and 86 supported on the guide bar 80 facing in the Y direction to circulate in the Y direction. I am doing. The head 30 attached to the second drive belt 82 is moved in the Y direction over the platen 10. The head 30 is structured to move in the XY direction over the cut medium 20 mounted on the platen 10.

  The above configuration is the same as that of a conventional general-purpose vertical plotter and horizontal plotter. However, in the plotter shown in FIGS. 1 to 4, the head 30 is placed above the cut medium 20 on the platen 10 in the X direction. The cutter 32 gripped by the head 30 from the first drive motor 50 and / or the second drive motor 60 that moves the head 30 relative to the cut medium 20 on the platen 10 in the Y direction. As the distance T to the portion where the cutting speed change of the cut medium 20 cut by, for example, a straight line or a curved cut line is continued in an edge shape, or a portion where the cut line is interrupted, becomes longer, The phase of the head 30 in the X direction and / or the Y direction with respect to the cut medium 20 at the cut speed change portion of the cut medium 20 Acceleration adjustment means 70 is gradually decreased adjust the absolute value of the moving acceleration is provided a manner.

The acceleration adjusting means 70 uses the cut data stored in the storage means 40 to determine the distance T from the first drive motor 50 to the cut speed change portion of the cut medium and / or the second drive motor 60 to the cut medium. The absolute value of the optimum acceleration change data stored in the sub storage means 74 is calculated from the calculation means 72 for calculating the distance T to the cutting speed change location and the value of the distance T to the cutting speed change location calculated by the calculation means. Similarly, a derivation means 76 for deriving an absolute value of the relative optimum movement acceleration in the X direction or the Y direction of the head 30 with respect to the cut medium 20 at the cutting speed change portion of the cut medium 20; In accordance with the absolute value of the relative optimum movement acceleration in the X direction and / or Y direction of the head 30 derived by the deriving means, At a cut rate Changes, the head 30 from above, for example, zero of the cutting medium 20 in a steady rate 20 mm / sec. The head 30 is moved while being relatively accelerated in the X direction and / or Y direction, or the head 30 is relatively decelerated in the X direction or / and Y direction over the cut medium 20 from the steady speed to zero. The head acceleration / deceleration means 78 is configured to move while moving.
Then, by the calculation means 72, the distance T from the first drive motor 50 to the cut speed change portion of the cut medium 20 and / or the distance T from the second drive motor 60 to the cut speed change portion of the cut medium 20 Using the cut data stored in the storage means 40, automatic calculation can be performed. Next, using the derivation means 76, the value of the distance T to the cutting speed change location calculated by the calculation means 72 is used to follow the absolute value of the optimum acceleration change data stored in the sub storage means 74, and the cut target The absolute value of the relative optimum movement acceleration in the X direction and / or the Y direction of the head 30 with respect to the cut medium 20 at the cutting speed change portion of the medium 20 can be derived. Then, using the head acceleration / deceleration means 78, the cutting speed change of the cut medium 20 is changed in accordance with the absolute value of the relative optimum movement acceleration in the X direction and / or Y direction of the head 30 derived by the deriving means 76. At the location, the head 30 is moved over the cut medium 20 from zero to a steady speed of 20 mm / sec. The head 30 is accelerated while being relatively accelerated in the X direction and / or the Y direction, or conversely, the head 30 is moved over the cut medium 20 while being relatively decelerated in the X direction or / and the Y direction from the steady speed to zero. It is possible to let you.
The calculating means 72, the sub storage means 74, the derivation means 76, and the head acceleration / deceleration means 78 are used for driving the electronic control circuit and memory circuit of the host computer for controlling the cutting plotter drive, and for driving the first drive motor 50 and the second drive motor 60. An electronic control circuit is used. The absolute value of the optimum acceleration change data stored in the sub storage means 74 is obtained by actually cutting the cut medium 20 using the cutting plotter shown in FIGS. 1 to 3 and the cutting plotter shown in FIG. The experimental data values obtained are used.

The cutting plotter shown in FIGS. 1 to 3 and the cutting plotter shown in FIG. 4 are configured as described above.
Next, a preferred embodiment of the method for cutting a medium to be cut according to the present invention, which is an example of use of the cutting plotter shown in FIGS. 1 to 3 and the cutting plotter shown in FIG. 4, will be described.

  In the case of the vertical type plotter shown in FIGS. 1 to 3, the head 30 is positioned relative to the cut medium 20 mounted on the platen 10 in the XY directions according to the cut data stored in the storage means 40. Has been moved to. Specifically, the drive belt 62 is rotated around the pair of left and right pulleys 64 and 66 by the second drive motor 60, and the head 30 attached to the drive belt 62 is moved in the Y direction. Further, the feed roller 52 is rotated in the X direction by the second drive motor 50, and the cut medium 20 partially sandwiched between the feed roller 52 and the pressing roller 54 is moved over the platen 10 of the feed roller 62. It is moved in the X direction corresponding to the rotation direction. Then, the head 30 is moved relative to the cut medium 20 in the XY directions, and the cut medium 20 is cut into a desired shape by the cutter 32 held by the head 30.

  In the case of the horizontal plotter shown in FIG. 4, the head 30 is moved in the X and Y directions above the cut medium 20 mounted on the platen 10 according to the cut data stored in the storage means 40. Specifically, the first drive motor 50 circulates the first drive belt 51 around the pair of front and rear pulleys 53, 55, and the guide bar 80 attached to the first drive belt 51 facing the Y direction is moved in the X direction. Is translated in parallel. Further, the second drive motor 60 rotates the second drive belt 82 around the pair of left and right pulleys 84 and 86 on the guide bar 80 in the Y direction, and the head 30 attached to the second drive belt 82 is moved to the platen 10. The upper part is moved in the Y direction. Then, the head 30 is moved relative to the cut medium 20 mounted on the platen 10 in the X and Y directions, and the cut medium 20 is cut into a desired shape by the cutter 32 held by the head 30. is doing.

  In this case, both plotters use the acceleration adjusting means 70 to move the head 30 relative to the cut medium 20 in the X direction and / or move the head 30 above the cut medium 20. As the distance T from the second drive motor 60 that relatively moves the cut medium 20 in the Y direction to the cut speed change portion of the cut medium 20 cut by the cutter 32 held by the head 30, the cut target is increased. The absolute value of the relative movement acceleration of the head 30 relative to the cut medium 20 in the X direction and / or the Y direction at the cut speed change position of the medium 20 is stored in the optimum acceleration change data stored in the sub storage means 74. The absolute value is adjusted to be gradually smaller.

In the case of the vertical plotter shown in FIGS. 1 to 3, when the head 30 is located at a location far from the second drive motor 60, the location far from the second drive motor 60 is moved together with the drive belt 62. The absolute value of the moving acceleration of the head 30 moved in the Y direction is adjusted to be small. When the head 30 is positioned far from the second drive motor 60, the inertial force applied to the elastic drive belt 62 is weakened, and the expansion / contraction amount of the drive belt 62 moved in the Y direction together with the head 30 is increased. It is kept small below a certain allowable value. Then, following the rotation angle of the second drive motor 60, the head 30 located at a position far from the second drive motor 60 is suppressed to the extent that the time delay in the Y direction can be ignored together with the drive belt 62. The tracking movement can be performed almost accurately.
At the same time, when the head 30 is located at a location far from the first drive motor 50, there is a gap between the feed roller 52 portion near the head 30 at a location far from the first drive motor 50 and the pressing roller 54 above it. The absolute value of the moving acceleration of the medium to be cut 20 that is moved in the X direction that is in the X direction corresponding to the rotation direction of the feed roller 52 is adjusted to be small. The twist angle of the portion of the feed roller 52 far from the first drive motor 50 with respect to the portion of the feed roller 52 near the first drive motor 50 is kept small. Then, following the rotation angle of the first drive motor 50, a part to be cut is sandwiched between the feed roller 52 portion located at a position far from the first drive motor 50 and the pressing roller 54 thereabove. The medium 20 can be moved in the X direction corresponding to the rotation direction of the feed roller 52 to the extent that a time delay can be ignored to be negligible and can be moved substantially accurately.
Even when the head 30 is moved in the X direction or / and the Y direction over the cut medium 20 on the platen 10 far away from the first drive motor 50 and / or the second drive motor 60, the head 30 is also moved. A time delay can be ignored above the cut medium 20 mounted on the platen 10 in accordance with the rotation angles of the first drive motor 50 and the second drive motor 60 according to the cut data stored in the storage means 40. It is made possible to move relatively accurately in the X direction and / or the Y direction while keeping it small. The cutter 32 held by the head 30 allows the cut medium 20 to be cut almost accurately with little deviation to the extent that it can be ignored along the desired cut line.

In the case of the horizontal plotter shown in FIG. 4, when the guide bar 80 supporting the head 30 is located at a location far from the first drive motor 50, the location far from the first drive motor 50 is changed to the first location. The absolute value of the movement acceleration of the guide bar 80 that is translated in the X direction together with the drive belt 51 is adjusted to be small. When the guide bar 80 is positioned far from the first drive motor 50, the inertial force applied to the elastic first drive belt 51 is weakened and moved in the X direction together with the guide bar 80. The amount of expansion and contraction of the belt 51 is kept small below a certain allowable value. Then, following the rotation angle of the first drive motor 50, the guide bar 80 that supports the head 30 located far from the first drive motor 50 is time-delayed in the X direction together with the first drive belt 51. It is made possible to follow and move almost accurately with a small amount of noise that can be ignored.
At the same time, when the head 30 is located at a location far from the second drive motor 60, the absolute value of the moving acceleration of the head 30 that moves the location far from the second drive motor 60 in the Y direction together with the second drive belt 82. Is adjusted small. Then, when the head 30 is positioned at a position far from the second drive motor 60, the inertial force applied to the elastic second drive belt 82 is weakened and moved in the X direction together with the head 30. The amount of expansion / contraction is kept small below a certain allowable value. Then, following the rotation angle of the second drive motor 60, the head 30 located at a location far from the second drive motor 60 is reduced to the extent that a time delay in the Y direction can be ignored together with the second drive belt 82. It is possible to follow and move with almost accuracy.
Even when the head 30 is moved in the X direction or / and the Y direction over the cut medium 20 on the platen 10 far away from the first drive motor 50 and / or the second drive motor 60, the head 30 is also moved. A time delay can be ignored above the cut medium 20 mounted on the platen 10 in accordance with the rotation angles of the first drive motor 50 and the second drive motor 60 according to the cut data stored in the storage means 40. It is made possible to move relatively accurately in the X direction and / or the Y direction while keeping it small. The cutter 32 held by the head 30 can cut the cut medium 20 almost accurately with little deviation along the desired cut line to a negligible level.

Further, both the cutting plotter shown in FIGS. 1 to 3 and the cutting plotter shown in FIG. 4 use the acceleration adjusting means 70 to cut the cut medium 20 from the first drive motor 50 and / or the second drive motor 60. As the distance T to the speed change portion becomes shorter, the absolute movement acceleration relative to the cut medium 20 of the head 30 relative to the cut medium 20 at the cut speed change portion of the cut medium 20 is absolute. The value is gradually adjusted to be larger in accordance with the absolute value of the optimum acceleration change data stored in the sub storage unit 74. Then, the cutting speed of the cut medium 20 is increased at a location where the distance T from the first drive motor 50 and / or the second drive motor 60 to the cut speed change portion of the cut medium 20 is short.
The throughput of the cutting work of the cut medium 20 using the vertical plotter and the horizontal plotter can be increased.

The cutting plotter of the present invention and the cutting method of a medium to be cut using the cutting plotter try to cut various media to be cut such as a plastic sheet, a sealing material, and a fabric accurately into a desired shape so as not to be displaced or distorted. In some cases, it is widely available.
The present invention can also be used when a graphic pen is gripped by the cutting plotter head instead of the cutter and various pictures and characters are printed on the surface of a recording medium such as a sheet by the graphic pen. In such a case, it is possible to accurately print a desired picture or character on the surface of the recording medium so as not to be shifted or distorted at all times, or to increase the throughput when the picture or character is printed on the surface of the recording medium.

It is a top view of the cutting plotter of this invention. It is a front view of the cutting plotter of this invention. It is AA sectional drawing of the cutting plotter of FIG. It is a top view of the cutting plotter of this invention. It is a top view of the conventional cutting plotter. It is a top view of the conventional cutting plotter.

Explanation of symbols

10 Platen 20 Cut medium 30 Head 32 Cutter 40 Storage means 50 First drive motor 51 First drive belt 52 Feed roller 54 Pressing roller 60 Second drive motor 62 Drive belt 70 Acceleration adjustment means 72 Calculation means 74 Sub storage means 76 Derivation Means 78 Head acceleration / deceleration means 80 Guide bar 82 Second drive belt

Claims (5)

The head is moved relative to the X and Y directions according to the cut data stored in the storage means above the cut medium mounted on the platen, and the cut medium is formed into a desired shape by the cutter held by the head. In the cutting plotter to cut,
A cutter held by the head from a first drive motor that moves the head relative to the cut medium in the X direction and / or a second drive motor that moves the head relative to the cut medium in the Y direction. As the distance T to the cut speed change portion of the cut medium to be cut becomes longer in the X direction and / or Y direction with respect to the cut medium of the head at the cut speed change portion of the cut medium. A cutting plotter comprising an acceleration adjusting means for adjusting the absolute value of the relative movement acceleration gradually to be smaller.   The acceleration adjusting means uses the cut data stored in the storage means, and the distance T from the first drive motor to the cut speed change portion of the cut medium or / and the second drive motor to the cut medium. According to the absolute value of the optimum acceleration change data stored in the sub-storage means, the calculating means for calculating the distance T to the cutting speed changing portion and the value of the distance T to the cutting speed changing portion calculated by the calculating means. Deriving means for deriving an absolute value of the relative optimum movement acceleration in the X direction and / or Y direction of the head with respect to the medium to be cut at the cutting speed change position of the medium to be cut, and deriving by the deriving means In accordance with the absolute value of the relative optimum movement acceleration in the X direction and / or Y direction of the head, the cutting speed of the cut medium is changed. , Cutting plotter according to claim 1, characterized in that said head and a head acceleration means for moving with relative acceleration or deceleration of the upper of the cut media in the X direction or / and the Y direction.   The second drive motor rotates the drive belt in the Y direction, moves the head mounted on the drive belt in the Y direction above the platen, and the first drive motor rotates the feed roller in the X direction. 2. A structure in which a medium to be cut partially sandwiched between the feed roller and the pressing roller is moved on the platen in the X direction corresponding to the rotation direction of the feed roller. Or the cutting plotter of 2.   The first drive motor circulates the first drive belt in the X direction, translates the guide bar mounted on the first drive belt in the Y direction in the X direction, and moves the second drive motor in the X direction. However, the second drive belt is circulated in the Y direction on the guide bar facing in the Y direction, and the head mounted on the second drive belt is moved in the Y direction on the platen. The cutting plotter according to claim 1 or 2, characterized in that: 5. The cutting plotter according to claim 1, wherein the head is moved relative to the cut medium mounted on the platen in the XY direction according to the cut data stored in the storage means. A cutting method for cutting the cut medium into a desired shape with a cutter held by the head,
The distance from the first drive motor that moves the head relative to the cut medium in the X direction using the acceleration adjusting means to the cutting speed change point of the cut medium that is cut by the cutter held by the head T or / and the distance T from the second drive motor that moves the head relative to the cut medium relative to the Y direction to the cutting speed change portion of the cut medium that is cut by the cutter held by the head. The absolute value of the relative movement acceleration in the X direction and / or the Y direction with respect to the cut medium of the head at the cutting speed change position of the cut medium is gradually adjusted to be smaller according to How to cut media.

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