JP2004130489A - Identification marking method in plate material processing machine, and its device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an identification marking method in a plate material processing machine wherein letter printing work is certainly performed in a less oil state without damaging productivity of plate material processing, and also to provide its device. <P>SOLUTION: Before the work is carried toward the plate material processing machine 1 in the X direction by a loader 77 disposed in a work carrying-in device 73, the work is placed on a material carrying-in table 69 moving in the Y direction orthogonal to the X direction under the loader 77. The material carrying-in table 69 is moved in the Y direction and the loader 77 is moved in the X direction, thereby performing identification marking on the work on the material carrying-in table 69 using a letter printing device 89 mounted to the loader 77. Printing is applied to the work in the less oil state before the plate material processing, so that the letter printing work is certainly performed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an identification marking method and apparatus in a plate material processing machine such as a turret punch press or a laser processing machine, and in particular, when processing a material into a semi-finished product with a plate material processing machine, performing identification marking on the semi-finished product. The present invention relates to an identification marking method and an apparatus for a plate material processing machine that can be used.
[0002]
[Prior art]
At present, when performing plate processing, in order to increase the yield of products, it is better to nest as many products as possible. However, since it may not be possible to identify what the processed product is, the necessity of entry of a product number for a work, that is, the necessity of identification marking for identifying each product has been called out. It should be noted that not only numbers but also barcodes are effective for the identification marking in that it can be used for calling a machining program in the next process.
[0003]
2. Description of the Related Art Conventionally, as an identification marking method in a plate material processing machine, a stamping die is previously mounted on a turret of a turret punch press as a plate material processing machine, and a processed product is stamped with the stamping die. Alternatively, identification marking (printing) is performed on the processed product after the plate material processing by an inkjet printer. The inkjet printer is a separate device from the turret punch press, and is mounted on a carriage movable in X and Y directions orthogonal to each other on the plane of the processed product, and is moved and positioned by a servo motor. I have.
[0004]
[Patent Document 1]
JP-A-11-277144
[0005]
[Patent Document 2]
JP-A-11-277378
[0006]
[Patent Document 3]
JP-A-11-277377
[0007]
[Problems to be solved by the invention]
By the way, in the conventional identification marking method, for example, when identification marking is performed using a stamping die mounted on a turret of a turret punch press, there has been a problem that a processing time becomes long and productivity does not increase.
[0008]
In addition, when the semi-finished product after plate processing is to be identified and marked by an ink jet printer, oil is applied to the work during plate processing by a turret punch press, for example, an oil mist when tapping or oil on a mold sliding portion. There is a problem that the ink may be blocked by the oil and may not be placed on the plate material because of the work.
[0009]
In addition, there is a problem in that printing is to be performed at a predetermined position of a semi-finished product, but since the position is already pierced, printing is performed on a table of an ink jet printer apparatus, and the apparatus is soiled.
[0010]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to provide a plate material processing machine capable of reliably performing a printing operation with a small amount of oil without hindering the productivity of plate material processing. The present invention provides an identification marking method and an apparatus therefor.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, an identification marking method in a sheet material processing machine according to the present invention according to claim 1 is a method for loading a work in an X direction toward a sheet material processing machine by a loader provided in a work carry-in device. A work is placed on a material loading table that moves in the Y direction orthogonal to the X direction at a position below the loader, and movement of one or both of the Y direction of the material loading table and the X direction of the loader is performed. The printing apparatus mounted on the loader is controlled to move up and down in a Z direction orthogonal to the XY directions to perform identification marking on a work on the material loading table.
[0012]
Therefore, instead of printing during or after the processing of the plate material, the identification marking is printed on the work in a low oil state before the processing of the plate material, so that the printing operation on the work is reliably performed. In addition, since the printing operation is performed before, for example, boring by the plate material processing machine, the printing operation can be reliably performed without, for example, splattering the printing ink or the like and contaminating the surroundings.
[0013]
In addition, since printing is performed using an essential axis of an operating mechanism used when the work is carried into the plate material processing machine, that is, a control operating mechanism in the XY directions, it contributes to cost reduction.
[0014]
In addition, while the plate material processing is being performed by the plate material processing machine, the printing operation is performed on the workpiece to be processed next, so that there is little or no loss time due to the printing operation, and the productivity of the plate material processing can be reduced. Printing work can be performed without any trouble.
[0015]
An identification marking device for a plate material processing machine according to the present invention according to claim 2 is a work loading device having a loader for loading a work in the X direction toward the plate material processing machine, and the X direction at a loading position below the loader. A material loading table movable in the Y direction perpendicular to the table, and a printing device mounted on the loader so as to be able to move up and down in the Z direction perpendicular to the XY direction so as to identify and mark a work placed on the material loading table. A control device for controlling movement of one or both of the material loading table in the Y direction and the X direction of the loader, and controlling the elevation of the printing device in the Z direction. is there.
[0016]
Therefore, similarly to the operation according to claim 1, instead of printing during or after the processing of the plate material, the identification marking is printed on the work in a low oil state before the processing of the plate material, so that the printing operation on the work is performed. Is performed reliably. In addition, since the printing operation is performed before, for example, boring by the plate material processing machine, the printing operation can be reliably performed without, for example, splattering the printing ink or the like and contaminating the surroundings.
[0017]
In addition, since printing is performed using an essential axis of an operating mechanism used when the work is carried into the plate material processing machine, that is, a control operating mechanism in the XY directions, it contributes to cost reduction.
[0018]
In addition, while the plate material processing is being performed by the plate material processing machine, the printing operation is performed on the workpiece to be processed next, so that there is little or no loss time due to the printing operation, and the productivity of the plate material processing can be reduced. Printing work can be performed without any trouble.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0020]
Referring to FIGS. 1 to 3, for example, a turret punch press 1 as a plate processing machine used in the present embodiment has side frames 5 and 7 erected on both sides of a base 3 on both sides of an upper frame 9. It is configured in a supported frame structure. At the lower part of the upper frame 9, a disk-shaped, small-diameter upper turret 11 having various types of punches P detachably mounted is rotatably mounted. A large-diameter lower turret 13 facing the upper turret 11 is rotatably mounted on the upper surface of the base 3. The lower turret 13 can face various types of punches P at a processing position K. A large number of dies D are arranged in an arc shape and are detachably mounted. The axis of the upper turret 11 and the axis of the lower turret 13 are arranged at different eccentric positions, and the upper turret 11 and the lower turret 13 are rotated in the same direction under the control of the control device 15 in synchronization with each other. You.
[0021]
The position of the die D and the punch P mounted on the lower part of the upper turret 11 and the lower turret 13 in FIG. 1 is the processing position K. The upper frame 9 above the punch P at the processing position K And a ram 17 (a pressing member) are mounted so as to be vertically movable. The ram 17 is connected to a lower end of a piston rod 21 of a hydraulic cylinder 19 mounted on the upper frame 9. The punch P is indexed and positioned below the ram 17 by the rotation of the upper turret 11 and the lower turret 13, and the positioned punch P is pressed by the ram 17 which is operated by the vertical movement of the piston rod 21 of the hydraulic cylinder 19. You.
[0022]
The turret punch press 1 is used to move and position the material W placed on the work table 23 including the fixed center table 23C and the side table 23S movable on both sides of the center table 23C in the front, rear, left and right directions. Is provided.
[0023]
The work movement positioning device 25 is provided with a carriage base 27 movable in the Y direction at the lower end of the work table 23 in FIG. 1, and a carriage 29 movable in the X direction is provided on the carriage base 27. Have been. The carriage 29 is provided with a clamp device 33 including a plurality of work clamps 31 that grip the material W at appropriate intervals in the X direction. The work movement positioning device 25 is controlled by the control device 15 such as a numerical controller to position the material W at a desired position between the punch P and the die D.
[0024]
Therefore, the punch P is pressed by the ram 17 after the plate-shaped material W is positioned between the punch P mounted on the upper turret 11 and the die D mounted on the lower turret 13. And the die D cooperate to perform punching on the material W.
[0025]
In addition, a center locating pin 35 is provided substantially at the center of the work table 23 so as to be able to protrude upward from the upper surface of the work table 23. Further, on the lower side of the work table 23 in FIG. 1, for example, an origin pad 37 is provided as an origin attracting device for attracting the material W to the center locating pin 35 and positioning the origin. Since the origin pulling device is known, its description is omitted.
[0026]
A work storage device 39 is provided adjacent to the right side of the turret punch press 1 in FIG. 1, and the work storage device 39 has a material pallet Pw loaded with a material W to be carried into the turret punch press 1. Are provided in a plurality of stages vertically.
[0027]
The work storage device 39 is composed of a plurality of columns made of, for example, a channel material and a frame 43 in which the columns are connected by a plurality of horizontal beam members. As shown in FIG. 2, guide rails having an L-shaped cross section are provided inside the frame 43 to guide and support a plurality of wheels provided on both left and right sides of each pallet. Are provided opposite to each other. By providing a plurality of these guide rails vertically, the inside of the upper side of the frame 43 is partitioned into a plurality of pallet storage shelves 41 for storing pallets.
[0028]
A pallet transfer guide rail 47 is provided at the lowermost stage of the frame 43 so as to move the material pallet Pw to the single-sheet picking device 45 on the right side in FIG. 3 (the upper side in FIG. 1). The pallet transfer guide rail 47 has a guide rail having an L-shaped cross section facing the inside of the frame 43.
[0029]
Also, below the work storage device 39 in FIG. 1, an appropriate material pallet Pw is taken out from the pallet storage shelf 41 and transferred to the single-sheet pick-up device 45 via the pallet transfer guide rail 47 or one sheet. In order to store the used material pallets Pw from the picking device 45 through the pallet transfer guide rails 47 into the pallet storage rack 41, an elevator device 49 is provided to be vertically movable.
[0030]
The elevator device 49 is guided by a vertical guide rail (not shown) provided on a column of the frame 43 and is connected to a chain 55 wound around a sprocket 53 of a winch device 51 mounted on the upper portion of the frame 43. Being moved up and down. The elevator device 49 is appropriately moved up and down by driving the winch device 51, and is positioned at a height corresponding to each pallet storage shelf 41 and a height at which the material pallets Pw are sent out to the pallet transfer guide rails 47 and the like.
[0031]
In the elevator device 49, a pallet transfer device 57 such as a traverser is provided so as to be able to reciprocate in the left-right direction in FIG. 3, and the pallet transfer device 57 moves the pallet storage shelf 41 and the pallet transfer guide rail 47. The material pallet Pw is sent out and pulled in.
[0032]
The pallet transfer device 57 is provided with an engaging projection provided at the end of the material pallet Pw and a hook that can be freely engaged and disengaged. The hooks are engaged with the engaging projections of the material pallets Pw, and the pallet transfer device 57 is moved in the left-right direction in FIG. Is sent and withdrawn.
[0033]
The single-sheet pick-up device 45 disposed above the work storage device 39 in FIG. 1 (right side in FIG. 3) picks one sheet from the material W on the material pallet Pw. The single-sheet picking device 45 includes a frame body 59 in which a plurality of columns made of, for example, a channel material and the like are connected to each other by a plurality of horizontal beam members.
[0034]
A pallet support rail 61 for movably mounting the material pallet Pw is provided below the frame body 59 so as to be connected to the pallet transfer guide rail 47. A single-sheet pick-up unit 65 having a plurality of suction pads 63 for sucking the material W loaded on the material pallet Pw one by one is provided above the frame body frame 59. The single-sheet pick-up unit 65 is moved up and down by a single-sheet pick-up actuator 67 such as a motor, and has a material sucking position where the material W is sucked and a standby position above a brush table 69 described later.
[0035]
At the position of the frame frame 43 of the work storage device 39 and the pass line PL of the frame frame 59 of the single take-off device 45, the material receiving position of the single take-up device 45 and the processing machine of the work storage device 39 For example, a brush table 69 is provided as a material loading table that horizontally moves between the loading position and the loading position. The brush table 69 has a brush implanted on its upper surface, and is driven by, for example, a table servo motor 71 as a table actuator to perform horizontal movement positioning. The drive mechanism of the brush table 69 is configured such that, for example, a ball screw rotationally driven by a table servomotor 71 is screwed into a nut member provided on the lower surface of the brush table 69.
[0036]
The brush table 69 receives the material W taken out by the sheet take-up device 45 at the material receiving position and supports the material W at the processing machine carry-in position.
[0037]
A work loading device 73 for loading the material W on the brush table 69 into the turret punch press 1 is provided below the work storage device 39. In the work loading device 73, the loader rail 75 extends substantially horizontally from the lower position of the pallet storage shelf 41 to a position above one side (the right side in FIG. 1) of the work table 23 of the turret punch press 1. A loader 77 for carrying in the material W is provided along a loader rail 75 so as to be able to reciprocate in the left-right direction (X direction) in FIG.
[0038]
More specifically, referring to FIGS. 4 and 5, a loader servomotor 81 as a loader actuator is mounted on the loader body 79, and a pinion rotated by the loader servomotor 81 is connected to the loader. Since the loader main motor 79 is meshed with the rack provided on the rail 75, the forward / reverse rotation of the loader servomotor 81 causes the loader main body 79 to reciprocate in the X direction along the loader rail 75.
[0039]
A stretch 85 is provided at the lower portion of the loader main body 79 via an up-down cylinder 83 so as to be movable up and down. The stretch 85 is provided with, for example, a loader clamp 87 as a plate material holding device. The loader clamp 87 is configured to be clamped and unclamped by, for example, an upper jaw and a lower jaw attached to the tip of a stretch 85. Note that the plate holding device may be a suction device including a vacuum pad, a magnet, or the like.
[0040]
Therefore, when the material W placed on the brush table 69 is gripped by the loader clamp 87 and moved in the X direction by the loader servomotor 81, the front side of the material W slides on the upper surface of the brush of the brush table 69. While being carried into the turret punch press 1.
[0041]
Further, the loader 77 is provided with, for example, an ink jet printer 89 as a printing device on the stretch 85 at a left end side in FIG. 5 through a bracket, for example, a printer cylinder 89A as a printer actuator. It is mounted so that it can move up and down in the direction. Therefore, the ink jet printer 89 is lowered in the Z direction, and the movement of the loader 77 in the X direction or the Y direction of the brush table 69 or both is controlled, so that the material W placed on the brush table 69 is removed. Printing (identification marking) is performed by the inkjet printer 89.
[0042]
In addition, a product storage area 91 as an accumulation position is provided adjacent to the left side of the turret punch press 1 in FIG. A device 93 is provided.
[0043]
As the product unloading device 93, an unloader rail 95 is provided to extend substantially horizontally in the X direction from a position on the upper left side of the product storage area 91 in FIG. 2 to a position above the work table 23 of the turret punch press 1. An unloader 97 is provided on the unloader rail 95 so as to be reciprocally movable.
[0044]
In the unloader body 99, for example, a pinion rotated by an unloader servomotor 101 as an unloader actuator is meshed with a rack provided on the unloader rail 95, and the forward / reverse rotation of the unloader servomotor 101 causes the unloader body 99 to rotate. It is reciprocated in the X direction along the unloader rail 95.
[0045]
Further, a stretch 105 which moves up and down via an elevating cylinder 103 is provided at a lower portion of the unloader main body 99, and a right side of the stretch 105 in FIGS. A plurality of unloader clamps 107 are provided. The unloader clamp 107 is configured to clamp and unclam by an upper jaw and a lower jaw. Note that the plate holding device may be a suction device including a vacuum pad, a magnet, or the like.
[0046]
Therefore, the semi-finished product G on the work table 23 of the turret punch press 1 is gripped by the unloader clamp 107 and carried out to the product storage area 91 by the unloader servomotor 101.
[0047]
In addition, a control panel that houses the control device 15 is provided at the upper right in FIG. The control device 15 controls each operation of the turret punch press 1. Further, the nesting data is received from the turret punch press 1, the position of each semi-finished product G in the material W is recognized, and control is performed so that printing is performed at an appropriate position of each semi-finished product G.
[0048]
Referring to FIG. 6, a control device 15 includes an input device 111 for inputting data such as work information including nesting data, mold information to be used, and a machining program to a CPU 109 serving as a central processing unit, and a display device. 113 and a memory 115 for storing input data are connected.
[0049]
The CPU 109 also includes a single-sheet picking unit 117 for giving a command to lift one sheet of material W from the material pallet Pw by the single-sheet picking unit 65 and place it on the brush table 69 at the material receiving position. The loader 77 is moved and positioned in the X direction to print at the position of each semi-finished product G based on the data, the brush table 69 is moved and positioned in the Y direction, and the inkjet printer 89 mounted on the loader 77 is moved and positioned in the Z direction. A marking command unit 119 for giving a command to perform printing on the material W on the brush table 69, and a work for giving a command to hold the material W on the brush table 69 by the loader 77 and carry it into the turret punch press 1 after the identification marking. The work is performed by the carry-in command unit 121 and the unloader 97 after punching. A product unloading command section 123 gives an instruction to discharge the product storage 91 holding the semi-product G of Buru on 23 is connected.
[0050]
The operation in the above configuration will be described. In particular, a state in which a desired material pallet Pw is pulled out from the pallet storage shelf 41 by the elevator device 49 and is placed on the pallet support rail 61 of the single-sheet picking device 45 via the lowermost pallet transfer guide rail of the frame 43. Will be described.
[0051]
In response to a command from the single-sheet pick-up unit 117, the single-sheet pick-up unit 65 is lowered while the brush table 69 is retracted from the material receiving position of the single-sheet pick-up device 45 to the processing machine carry-in position of the work storage device 39. One material W is sucked by the suction pad 63 from the material W on the material pallet Pw. The single-sheet picking unit 65 is raised, and the material W is raised to a single-sheet pick-up standby position. Thereafter, the brush table 69 is moved from the processing machine carry-in position to the material receiving position. The single-sheet pick-up unit 65 is lowered again, and the material W of the suction pad 63 is released, and is placed on the brush table 69.
[0052]
When the brush table 69 moves horizontally to the processing machine carry-in position according to a command from the marking command unit 119, the loader 77 is moved and positioned in the X direction based on the nesting data, and the brush table 69 is moved and positioned in the Y direction. Then, the ink jet printer 89 mounted on the loader 77 descends in the Z direction, and printing is performed on the material W on the brush table 69. In other words, one or both of the movement of the loader 77 in the X direction and the movement of the brush table 69 in the Y direction are controlled, and at the same time, the vertical movement of the inkjet printer 89 in the Z direction is controlled. Done.
[0053]
In addition, after being carried out as a semi-finished product G from the turret punch press 1, the above-mentioned printing may be lost due to a hole processing performed in another process. .
[0054]
After the above-described identification marking, the stretch 85 of the loader 77 is lowered by the upper and lower cylinders 83 according to a command from the work carry-in command section 121, the material W on the brush table 69 is gripped by the loader clamp 87, and the loader servomotor 81 The drive causes the loader 77 to move forward, and the material W is carried into the turret punch press 1.
[0055]
This material W is abutted against the locator pin 35 at the reference position by the origin pad 37 on the work table 23 and is positioned at the origin, then is gripped by the work clamp 31 and is moved and positioned by the work moving positioning device 25, and is turret punched. The contour of the semi-finished product G is punched by the processing position K of the press 1, and cut and separated from the original material W.
[0056]
1 and 2, the semi-finished product G separated from the material W is clamped by the plurality of unloader clamps 107 of the unloader 97 that advances rightward in FIGS. The semi-finished product G is lowered by the operation of the elevating cylinder 103 at a position above the storage space 91, and is loaded at a predetermined position in the product storage space 91.
[0057]
From the above, since the material W is printed by the inkjet printer 89 before, for example, drilling by the turret punch press 1, the material W is printed without oil such as oil mist, so that printing (ink) is performed. It is difficult to erase, and the printing operation is performed reliably.
[0058]
Further, the control operation by the servomotors 71 and 81 in the Y direction of the brush table 69 and the X direction of the loader 77 is an essential axis of the operation mechanism of the work loading device 73 used when loading the material W into the turret punch press 1. Since the mechanism is used for printing, it contributes to cost reduction.
[0059]
Further, while the punching is performed by the turret punch press 1, the printing operation is performed on the material W to be processed next, so that the loss time due to the printing operation can be zero (0) or almost eliminated, The printing operation is performed without impairing the productivity of the processing of the plate material.
[0060]
By the way, while the processing time of the turret punch press 1 often takes several minutes, the tact time of a normal single-sheet picking is 30 to 60 seconds, so the processing of the next material W is completed until the processing of the previous material W is completed. W is waiting on the brush table 69. Performing the printing operation during this waiting is very effective in utilizing the waiting time.
[0061]
The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. In this embodiment, a turret punch press has been described as an example of a plate processing machine, but other punch presses, laser processing machines, and other plate processing machines may be used.
[0062]
【The invention's effect】
As can be understood from the above description of the embodiment of the invention, according to the invention of claim 1, instead of printing during or after the processing of the plate material, before the processing of the plate material, the work with less oil is formed. Since the identification marking is printed, the work of printing on the work can be reliably performed. In addition, since the printing operation is performed before, for example, drilling by the plate material processing machine, the printing operation can be reliably performed without, for example, scattering the printing ink or the like and contaminating the surroundings.
[0063]
In addition, since printing can be performed using an essential axis of an operation mechanism used when the work is carried into the plate material processing machine, that is, a control operation mechanism in the XY directions, cost can be reduced.
[0064]
In addition, while the plate material is being processed by the plate material processing machine, the printing work is performed on the workpiece to be processed next, so that the loss time due to the printing operation can be reduced to zero or less, which hinders the productivity of the plate material processing. Printing work can be performed without the need for printing.
[0065]
According to the second aspect of the present invention, similar to the effect of the first aspect, the identification marking is printed on the work in a state where the amount of oil is small, instead of printing during or after processing the plate material, but before processing the plate material. Printing work on the work can be performed reliably. In addition, since the printing operation is performed before, for example, drilling by the plate material processing machine, the printing operation can be reliably performed without, for example, scattering the printing ink or the like and contaminating the surroundings.
[0066]
In addition, since printing can be performed using an essential axis of an operation mechanism used when the work is carried into the plate material processing machine, that is, a control operation mechanism in the XY directions, cost can be reduced.
[0067]
Also, while the plate material is being processed by the plate material processing machine, the printing work is performed on the workpiece to be processed next, so that the loss time due to the printing work can be reduced to zero or less, which hinders the productivity of the plate material processing. The printing operation can be performed without any need.
[Brief description of the drawings]
FIG. 1 is an overall plan view of an identification marking device in a sheet material processing machine according to an embodiment of the present invention.
FIG. 2 is a front view including a cross section of a main part viewed from below in FIG.
FIG. 3 is a side view as viewed from the right side of FIG. 1;
FIG. 4 is an enlarged front view of the loader and the printing device.
FIG. 5 is an enlarged side view taken in the direction of arrow V in FIG. 4;
FIG. 6 is a block diagram of a control device.
[Explanation of symbols]
1 Turret punch press (plate processing machine)
15 Control device
23 Work Table
25 Work positioning device
33 Clamping device
39 Work storage device
41 Pallet storage shelf
45 Single sheet picking device
49 Elevator equipment
57 Pallet transfer device
61 Pallet support rail
63 Suction pad
65 Single unit
67 Single actuator
69 brush table (material loading table)
71 Servo motor for table
73 Work loading device
77 loader
81 Loader servo motor
85 Stretch
87 Clamp for loader (plate gripper)
89 Inkjet printer (printing device)
89A Printer Cylinder (Printer Actuator)
91 Product storage area (collection location)
93 Product unloading device
97 unloader
101 Unloader servo motor (Unloader actuator)
107 Unloader clamp (plate gripper)
W material
P punch
D die
Pw material palette

Claims (2)

Before loading the workpiece in the X direction toward the plate material processing machine by the loader provided in the workpiece loading device, the workpiece is placed on the material loading table moving in the Y direction orthogonal to the X direction at a loading position below the loader at the loading position. To control the movement of one or both of the material loading table in the Y direction and the X direction of the loader, and to control the printer mounted on the loader to move up and down in the Z direction orthogonal to the XY directions. An identification marking method for a workpiece on the material loading table. A work loading device having a loader for loading a workpiece in the X direction toward the plate material processing machine; a material loading table movable in the Y direction orthogonal to the X direction at a position below the loader at a loading position; A printing device mounted on the loader so as to be able to move up and down in a Z direction perpendicular to the XY directions to identify and mark a work placed on the carry-in table; A control device for controlling one or both of the movements and for controlling the elevation of the printing device in the Z direction.

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