DE2045297A1 - Method for limiting the cutting program of electronically controlled paper cutting machines - Google Patents

Description

PATENT ADVOCATE

. KARL SCHMIDT

Telephone 28 7O 38 "

Postal check account ι Frankfurt CMaInJ 1389

Bank details: Nassauische Sparkasse main branch Frankfurt CMaInD account no. 14000 55

Your letter of

My sign

P 7020

FRANKFURT AM MAIN

Rossmarkt 15a.

Sept 9, 1970

Rudolf Mohr 6238) Hofheim / Ts., Hattersheimerstr. 18-20

Method for limiting the cutting program of electronically controlled paper cutting machines.

The invention relates to a method of limiting of the cutting program of electronically controlled paper cutting machines and concerns one Control, which helps prevent unused saddle movements while the cutting program is running the first and after the last cut should be avoided ". - * '

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_ 2 -

The advance movement and the return movement of the saddle are recorded in a known manner by a recording medium, on which pulses are given in the desired cutting sequence, controlled. After finishing the cutting process the feed saddle is moved back into the starting position, the end position of the Saddle is limited by a switching element. In this starting position, the saddle is on the rear end of the work table. If the machine is charged with new material to be cut, for example does not fill the entire length of the cutting table, the saddle must be moved forward so far until it rests against the material to be cut or has reached the first cut mark on the recording medium. This The path thus depends on the length of the material to be cut and the start of the cutting program on the recording medium. This creates a more or less large idle, which affects the cutting performance of a machine significantly impaired. The same applies to the movement of the saddle after the last one has been carried out Cut, whereby the saddle still has to perform a certain forward movement in order to reach the cut Slide it well under the cutting knife on the front table so that it is safe from the Operator can be removed.

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This forward movement is also dependent on the size of the cut sections, i.e. that with a wide End section the forward movement is greater than with a narrow end section.

To limit this lead to the required size, the operator had to control this additional saddle movement manually.

It has also been suggested by, applying an additional impulse on the program carrier to carry out this ejection movement. The disadvantage of this known method is that when programming of the cutting program, care must be taken to ensure that the additional mark is actually applied is, with then still for the initiation of the return flow the operator carries out the necessary switching operations must perform. So it is the cutting performance of the machine to a large extent from the qualification depending on the operator, the idle times the movement of the saddle after the first or last cut are largely beyond the control of the operator.

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The inventor has now set himself the task of creating a method for limiting the shield program with which it is possible to precisely adjust the saddle movement during the entire cutting process Shut off the cutting program so that practically no unnecessary idle times during the fifth wheel advance or arise during the return.

According to the invention, this is done in a method for Limitation of the cutting program of electronically controlled paper cutting machines achieved by that delimitation markings are applied parallel to the cutting markings on the recording medium that the saddle movement when moving forward and backward in relation to the first and last cutting mark is optimal limited.

The boundary marks are expediently applied at the same height as the first and last cutting marks , so that an additional movement of the saddle during programming is not necessary.

So that the saddle reversal in the forward or reverse can be precisely defined, the front Limitation by a single mark and the rear

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The boundary is marked with a tandem mark. The tandem mark consists of two spaced apart of approximately 1 mm applied marks that can be set automatically during programming.

The invention is described below using an exemplary embodiment, the position of the feed saddle at the beginning and at the end of the cutting process and shows the programmed recording medium, explained in more detail.

In the drawing, the forward saddle 1 is in the starting position, i.e. at the beginning of the cutting process, dash-dotted lines and after the end of the cutting process, shown in solid lines.

The advance movement of the saddle 1 is generally controlled by the recording medium 2 and the one applied to it Program track 3 »which is traversed by the magnetic head 4, controlled, while the return movement of the saddle 1 through the program track 5, which is run over by the head 6 takes place.

When programming track 3 , the first program mark 7 simultaneously goes to track 5, the

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the tandem mark 9 consisting of two pulses 8 is set. Also with the last program brand 10 at the same time the boundary mark 11 for the front boundary is applied to the track 5.

^ When the cutting sequence is initiated, the

Saddle from the position shown in dash-dotted lines to the position indicated by the full line.

During this movement process, the individual cuts are made according to the markings 12 .

Once the magnetic head 4 has reached the cutting mark 10, the last cut is carried out and the boundary mark 11 is activated. The mark 11 moved by loading w corresponding command to the drive motor to the saddle initially a well-defined level for ejection of the residual cut material forward and backward movement of the saddle then initiates. The amount of advance is shown by the dashed lines 13, 14, 15. The size of this feed movement is expediently controlled by means of a potentiometer. If the head 6 reaches the tandem mark 8 during the return, this becomes the saddle

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switched to slow speed and at the same time in the Forward movement reversed.

After reaching the mark 7 by the main head, the exact cutting dimension is approached in the usual way and by pressing the cutting buttons Cutting process initiated.

So that the course corresponds to lines 13, 14, 15 can be controlled completely automatically without pre-setting a corresponding potentiometer, a limiting effect is expediently set that the Time lapse between the last two cutting marks 10,12 saves and thus the advance path in one selectable ratio to the distance between the two program marks 10, 12 controls. Herewith the Advance travel of the saddle with different cutting widths in the overall program according to the width of the last cut product. This means that the saddle movement is open for any cutting program limited to an optimum, so that practically any idling of the saddle is eliminated. The cutting performance of the machine is thus achieved without the operator having to do anything increased to the maximum.

- Patent claims 20 98 13/008 8

Claims (5)

Claims. Procedure for limiting the cutting program of electronically controlled paper cutting machines, characterized in that parallel to the cutting marks "(7,10,12) on the recording medium (2) Be Boundary markings (9, 11) are applied, which the saddle movement when moving forward and backward in With respect to the first and last cutting marks (7, 10) optimally limited. 2. The method according to claim 1, characterized in that the boundary marks (9,11) at the same time and in the same amount with | the first and last cutting mark (7, 10) to be brought. 3. The method according to claim 1-2, characterized in that that the front limit mark (11) consists of a single mark, 2 0 9813/0088 4. The method according to claim 1-3, characterized g e ■ k e η η ζ e i c h η e t that the tandem mark (9) from two applied at a distance of about 1 mm Brands (8). 5. The method according to claims 1-4, characterized in that & en η indicates that the limit mark (11) the advance path or paths (13, 14, 15) in a selectable ratio to the distance of the two program marks (10, 12) controls. 20 9813/008 8 Blank page