JPH0640649A - Control method for carrying of rolled paper in plotter - Google Patents

Abstract

PURPOSE:In a paper moving plotter using a rolled paper, to lighten a shock acting on the machine glazed paper at the time of winding the loosened part of the paper on a paper feeding means, and to thereby prevent paper slippage to a driving roller and a pressure roller. CONSTITUTION:In the case where a seasoning machine glazed paper 32 hung down toward a paper feeding means 36 is wound by the rotation of the means 36, a driving roller 22 is previously rotated at high speed as much as specified quantity, and the paper 32 is fast driven toward the paper feeding means 36 as much as a specified quantity (for instance 25mm), and air is fed into a space between a platen 4 and the paper 32. Next, the paper feeding means 36 is rotated at high speed in the winding direction of the paper 32. At the time when the driving roller 22 is loaded, a paper feeding motor to drive the paper feeding means 36 is stopped, and the driving roller 22 is rotated to feed the paper 32 toward the paper feeding means 36 by quantity about the same as the quantity of rotation caused by the inertia of the paper feeding means 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper conveyance control method for a plotter.

[0002]

2. Description of the Related Art In a paper-driven plotter, in order to adapt the paper to the temperature and humidity of the drawing environment, the operation of pulling the roll paper largely out of the roll part of the roll paper held by the paper feeding means is called seasoning. I'm calling. In the seasoning, the paper corresponding to the next drawing area is pulled out without tension on the paper being drawn. In this paper drawing operation, a device such as an encoder may be used to accurately draw the paper corresponding to the next area, but if the amount of paper drawn in the seasoning operation does not require accuracy. However, providing a device such as an encoder leads to high cost. Therefore, the paper feeding means is driven in the paper feeding direction for a predetermined time, and the paper corresponding to the next drawing area is pulled out.

[0003]

According to the above method, when the paper being seasoned is drawn out to the image forming area, the paper being seasoned drawn from the paper feed roller may be left behind. Then, this residual amount is added to the slack amount of the next season, and there is a defect that the slack of the roll paper during the season gradually increases. The present invention aims to solve the above problems.

[0004]

In order to achieve the above object, the present invention provides a platen on which a sheet is placed, a pinch roller mechanism including a driving roller and a pressure roller, and a roll section for rotating a roll sheet. A roll paper supported by the paper feed means is provided, which includes a paper feed means that freely supports it, a drive means that rotationally drives the paper feed means, a pen, and a means that drives the pen in a direction that traverses the platen. Pull out on the platen,
The drive roller and the pressure roller sandwich the roll paper drawer on the platen, and the forward and backward rotation of the drive roller feeds the roll paper drawer in the front-back direction on the platen, while the pen draws the roll paper. In a plotter in which a predetermined image is drawn on a roll paper pull-out portion on a platen by controlling movement in a direction traversing the sheet feeding unit, the seasoning portion of the roll paper hung from the paper feeding means by a predetermined amount for the seasoning is used to feed the paper. For the operation of winding the roll paper on the means, the drive roller is rotated at a high speed to rapidly drive the roll paper drawer on the platen in the direction of the paper feeding means, and air is drawn between the platen and the roll paper drawer. A feeding step, a winding step of rotating the paper feeding means in a winding direction after the step, and a seasoning section of the roll paper wound on the paper feeding means. And tension is applied to the roll paper between the paper feeding means and the pinch roller mechanism, and a stop command is supplied to the paper feeding means when a load is applied to the drive roller by this tension. It is a thing.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In FIG. 2, reference numeral 2 denotes a main body of a paper drive type (paper moving type) automatic drafting machine (plotter), which includes a platen 4 (paper mounting plate). A controller 6 is built in the main body 2. The main body 2 is fixed to the upper ends of the pair of legs 8 and 10.

An image forming head 12 is arranged on the platen 4 along a horizontal rail 14 fixed to the main body 2 so as to be movable in the direction perpendicular to the paper surface (Y axis direction) in FIG.
The drawing head 12 is driven in the Y-axis direction by a Y-axis motor 16, and the Y-axis motor 16 is connected to the controller 6 via a Y-axis motor driver 17 and a Y-axis servo means 18. A drawing roller 20 and a driving roller 22 are arranged below the slot of the platen 4 in association with a driving motor 23.

The drive motor 23 is connected to the controller 6 via a drive motor driver 25 and an X-axis servo means 27. A pinch roller (pressure roller) 24 is arranged above the drive roller 22 so as to be capable of being pressed against the drive roller 22. The pen 26 held by the pen holder of the drawing head 12 is arranged above the drawing roller 20.

The pen holder is linked to an elevating / lowering output section of a moving coil 28 built in the drawing head 12, and the pen 26 is moved up and down in conjunction with the elevating / lowering output section to move the pen 26 to roll paper 32 on the drawing roller 20.
It is configured so that it can be pressed against and separated from. The moving coil 28 is connected to the controller 6 via a driver 29. A shaft-shaped winding means 34 is rotatably supported between the legs 8 and 10 in front of the legs 8 and 10, and a roll sheet is provided on the rear side of the legs 8 and 10. The shaft of the paper feeding means 36 is rotatably supported.

The winding means 34 is connected to the output shaft of the winding motor 30, and the paper feeding means 36 is connected to the output shaft of a paper feeding motor 38. The motors 38 and 30 are connected to the controller 6 via drivers 40 and 42, respectively. A tension roller 44 is rotatably provided above the paper feeding means 36 and hung between the legs 8 and 10. A tension roller 48 is located above the winding means 34 and is rotatably suspended between the legs 8 and 10.

The roll paper 3 is attached to the shaft of the paper feeding means 36.
The second roll portion 32a is detachably held. The pull-out portion of the roll paper 32 fed out from the roll portion 32a at the rear of the plotter is provided between the tension roller 44 and the stopper sheet 46 elastically contacting the tension roller 44, the upper surface of the platen 4 and the tension roller 48, and the stopper sheet elastically contacting this. It is wound around a roll paper winding core (not shown) of the winding means 34 in front of the plotter after passing through 50.

The output shafts of the drive motor 23 and the Y-axis motor 16 are connected to the input shafts of an X-axis encoder 52 and a Y-axis encoder 54, respectively, and the output ends of the encoders 52 and 54 are respectively X-axis servo means. 27 and Y-axis servo means 18. Reference numeral 56 is an operation panel of the controller 6 provided in the main body 2. The controller 6 controls the X-axis servo system and the Y-axis based on the plotter command.
In addition to controlling the axis servo system, it also outputs drive commands to the paper feed and take-up motor drivers 40 and 42, and the drivers 40 and 42 drive the paper feed and take-up motors 38 and 30 based on the commands. Then, the roll paper 32 is supplied and wound up.

The X-axis servo system includes the X-axis servo means 2
7, a drive motor driver 25, a drive motor 23, and an X-axis encoder 52. X-axis servo means 27
Is equipped with an error counter for calculating the position deviation between the target position supplied from the controller 6 and the count value (current position) of the output pulse of the X-axis encoder 52, and the speed counter matches the speed based on the value of the error counter. A current command that falls below a certain value is generated, and the command is supplied to the drive motor driver 25. The drive motor driver 25 drives the drive motor 23 by pulse width modulation based on the current command.

The drive motor 23 rotationally drives the drive roller 22 to reciprocate the pull-out portion of the roll paper 32 in the X direction. The X-axis servo system doubles as the controller 6 with the paper conveyance control system.
The value of the error counter of the X-axis servo means 27 is constantly monitored, and when the value of the error counter rapidly increases, the roll paper 3
It is detected that the tension is applied to 2 and the load is applied to the drive roller 22. That is, the completion of winding the seasoning portion 32b of the roll paper 32, which will be described later, is detected thereby.

The Y-axis servo system also drives the imaging head 12 in the Y-direction by the same operation as the X-axis servo system. Driving the drawer of the roll paper 32 in the X direction, driving the drawing head 12 in the Y direction, and the pen 2
A predetermined drawing is performed on the roll paper 32 by the lifting operation of 6.

Next, an automatic winding sequence of roll paper, which is a main part of the present invention, will be described with reference to FIG.
In FIG. 3, numbers 1 to 11 indicate step numbers. First, when drawing of one frame (one page) is completed, the controller rotates the drive roller 22 in the counterclockwise direction at a high speed in FIG. The page segmentation ending range is sent to the winding means 34 (step 1).

Next, the drive roller 22 is reversely rotated (in FIG. 1,
Then, the drawer unit for the roll paper 32 is returned to the paper feeding unit 36 side at a low speed (step 2). The margin amount M1 is the winding means 3 described later.
This corresponds to the movement amount of the roll paper 32 pull-out portion caused by the rotation of the winding means 36 due to the inertia after the winding rotation stop operation of 6. Next, the controller 6 rotates the winding means 36 in the counterclockwise direction in FIG. 1, and winds up the drawing end frame (for one page of drawing end) of the drawer of the roll paper 32 on the winding means 36 ( Step 3).

The end of winding of the winding means 34 is detected from the error counter value of the X-axis servo system (step 4). This detection operation is performed as follows. Winding means 3
When 4 rolls up the drawing end frame, the slack 32c on the winding side of the roll paper 32 shown in FIG. 1 disappears. At this time, tension is applied to the roll paper 32 between the drive roller 22 and the tension roller 48. Due to this tension, the drive roller 22 slightly moves counterclockwise in FIG. 1 due to friction with the roll paper 32. This fine movement is converted into a pulse signal by the X-axis encoder 52.
It is supplied to the X-axis servo means 27.

When a pulse is supplied from the X-axis encoder 52, the value of the error counter of the X-axis servo system rapidly increases. Due to the rapid increase in the value of this error counter, the controller 6
Is the roll paper 32 between the drive roller 22 and the winding means 34.
However, until the slack disappears, it is recognized that the winding means 34 has wound the winding means, that is, the winding end of the winding means 34 is recognized. At the same time that the controller 6 detects the end of winding the roll paper 32, the controller 6 rotates the drive roller 22 at a high speed in the counterclockwise direction in FIG. 1 to rotate the roll paper 32 by the margin amount M1 and the winding means 34. Send to the side (step 5).

This prevents a strong impact from being applied to the roll paper 32 sandwiched between the pressure roller 24 and the drive roller 22 at the end of winding. Next, controller 6
1, the drive roller 22 is rotated counterclockwise at a low speed in FIG. 1, and a predetermined margin amount M2 and an amount obtained by adding a predetermined amount A (for example, 25 mm) to the roll paper 32 are taken up by the winding means 3.
4 side (step 6). The predetermined margin amount M2 is set to an appropriate amount equal to or larger than the amount of inertial rotation after a stop command is supplied to the driving unit of the sheet feeding unit 36 when the winding operation of the sheet feeding unit 36 described later is stopped. There is.

Next, the controller 6 controls the drive roller 22.
1 is rotated clockwise at a high speed to return the roll paper 32 for the predetermined amount A to the paper feeding means 36 side (step 7).
By the high speed movement of the roll paper 32 for the predetermined amount A,
The drawer of the roll paper 32 floats up on the platen 4 behind the drive roller 22, and at this time, air enters between the platen 4 and the drawer of the roll paper 32. This air serves as a cushion when the roll paper 32 is wound up by the paper feeding means 36, and prevents the roll paper 32 from breaking.

Next, the controller 6 feeds the slackened portion of the roll paper 32, ie, the seasoning portion 32b, which has been loosened in advance below the paper feeding means 36 for seasoning, so as to wind it around the paper feeding means 36. 36 is rotated counterclockwise at a high speed (step 8). The end of winding of the seasoning section 32b of the sheet feeding means 36 is detected from the error counter value of the X-axis servo system. This detection operation is performed according to the same principle as the operation of detecting the winding end of the winding means 34.

The controller 6 uses the seasoning section 32b.
When the end of winding of the paper is detected, a stop command is supplied to the paper feed motor 38, and the controller 6 causes the drive roller 2 to move.
2 is rotationally driven in the clockwise direction at a high speed, and the pull-out portion of the roll paper 32 sandwiched between the drive roller 22 and the pressure roller 24 is returned to the side of the sheet feeding means 36 for the margin amount M2 (step 9). This prevents the roll paper 32 sandwiched between the pressure roller 24 and the driving roller 22 from being applied with a strong impact by the inertia of the paper feeding means 36 when the winding of the paper feeding means 36 is completed.

Next, the controller 6 controls the drive roller 22.
In FIG. 1, the roll paper 32 is driven counterclockwise at a high speed, and the roll paper 32 is pulled out from the paper feeding means 36 for one frame with a strong tension (step 10). The roll paper 32 being seasoned is temporarily wound around the paper feeding means 36, and then the roll paper 32 is pulled out by one frame from the paper feeding means 36. The reason is that if the roll paper 32 being seasoned is pulled out as it is, This is because the roll paper 32 tends to meander and cannot be pulled out at high speed.

Next, the controller 6 rotates the paper feeding means 36 in a clockwise direction at a high speed to pull out the seasoning portion 32b from the roll portion 32a (step 11). The method of securing the margin amounts M1 and M2 is performed by the steps before the step of securing the margin amount.
A method of stopping the conveyance of the roll paper 32 at a position where 2 minutes are secured may be used.

In the above embodiment, the control at the time of transporting the roll paper while continuing the image formation was described, but in addition to this, the roll paper winding operation of the paper feeding means is also performed at the time of initial setting (paper initial) of the roll paper. This operation will be described below. The controller 6 confirms the presence / absence of the paper feeding unit 36.
Confirm with a sensor (not shown). If there is no paper feeding means, cut paper is used. The controller 6 also confirms the presence or absence of the winding means 34 by a sensor (not shown).

Those skilled in the art call a state in which there is the paper feeding means 36 and no winding means 34 a half roll, and a case in which both are present is called a complete roll. If it is a half roll or a complete roll, the controller 6 performs an operation of removing the slack of the seasoning portion 32b. This is a predetermined amount A, drive roller 2
At 2, the roll paper 32 is conveyed at high speed to the paper feed means 36 side. As a result, air is sent between the platen 4 and the drawer of the roll paper 32 to form a cushion.

Next, the controller 6 drives the paper feeding means 36 to wind up the seasoning portion 32b. The completion of winding is detected by the X-axis servo system. Next, the controller drives the paper feeding means 36 and pulls out the seasoning paper 32b. After seasoning, roll paper 3
2 is pulled up on the platen 4 to start drawing.

[0028]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, there is an effect that the roll paper in the seasoning portion can be reliably wound up without breakage of the paper and high-speed paper conveyance can be performed.

[Brief description of drawings]

FIG. 1 is a side view of a plotter.

FIG. 2 is an external view of a plotter.

FIG. 3 is a time chart showing a motor driving state.

FIG. 4 is a block diagram of a plotter.

[Explanation of symbols]

 2 main body 4 platen 6 controller 8 leg body 10 leg body 12 imaging head 14 lateral rail 16 Y-axis motor 17 driver 18 servo means 20 drawing roller 22 drive roller 23 drive roller 24 pinch roller 25 driver 26 pen 27 servo means 28 coil 30 winding Take-up motor 32 Roll paper 34 Take-up means 36 Feeding means 38 Feeding motor 40 Driver 42 Driver 44 Tension roller 46 Stopper sheet 48 Tension roller 50 Stopper sheet 52 Encoder 54 Encoder

Claims (3)

[Claims] 1. A platen for placing a sheet, a pinch roller mechanism including a driving roller and a pressure roller, a sheet feeding means for rotatably supporting a roll portion of a roll sheet, and the sheet feeding means. A driving means for rotationally driving, a pen, and a means for driving the pen in a direction traversing the platen are provided, and the roll paper supported by the paper feeding means is pulled out onto the platen, and the drive roller and the pressure roller are provided. Hold the drawer of the roll paper on the platen and feed the drawer of the roll paper forward and backward on the platen by rotating the drive roller forward and backward, while controlling the movement of the pen in the direction that crosses the drawer of the roll paper. In a plotter designed to draw a predetermined image on the roll paper drawer on the platen, the roll paper seasoning part hung down from the paper feed means for seasoning The operation of winding the roll paper on the sheet feeding means is performed by rotating the drive roller at a high speed to rapidly drive the pullout portion of the roll paper on the platen toward the paper feeding means, and between the platen and the pullout portion of the roll paper. A step of sending air to the sheet, a winding step of rotating the sheet feeding means in the winding direction after the step, and a seasoning portion of the roll paper being wound by the sheet feeding means and the sheet feeding means and the pinch. Tension is applied to the roll paper between it and the roller mechanism, and a step of supplying a stop command to the paper feeding means when a load is applied to the drive roller due to the tension, is configured to convey the roll paper. Control method. 2. When the stop command is supplied to the drive unit of the paper feeding means, the drive roller is rotated by substantially the same amount as the movement amount of the roll paper due to the rotation due to the inertia of the paper feeding means. The roll paper transport control method in the plotter according to claim 1, wherein the roll paper is fed to the paper feed unit side. 3. The roll paper conveyance control method for a plotter according to claim 1, wherein an encoder connected to the drive roller detects that a load is applied to the drive roller.