Four-side trim

A four-side trim is recommendable if unprinted paper is damaged on the outside or if its angular position or dimensional accuracy is so poor that the paper is not suitable for the required printing or finishing processes, for example for work and tumble. Work and tumble means that the paper is printed on both sides and aligned at the two longer sides for this purpose. For working and tumbling the paper must be both angular and accurate to size.

In our example a ream of 70 cm x 100 cm is trimmed 5 mm, each, on all four sides. In the first example, the paper stack is aligned against the side gauge on the right-hand side. Make sure the proper clamping pressure is adjusted before starting the program.

Example of a program: four-side trim, jogging mark and programmable ejector

The paper should be cut on the long side first. Align the paper properly against the backgauge and cut it. In our example the first cut is made at a position of 69.5 cm.

Turn the material 90°, until the cutting surface is aligned against a side gauge. The backgauge is only used as a lay guide in order to obtain the dimensional accuracy. Consequently, the material is preferably placed against the side gauge. This procedure ensures that the paper becomes angular. In our example this cut is made at a position of 99.5 cm.

The paper stack is again turned 90°. Then align the material being cut against the backgauge and the righthand side gauge. In our example the measurement of 69.000 cm is complemented with the function "Air supply for entire table ON" to facilitate the turning of the material to be cut. In our example the third cut is made at a position of 69 cm.

The paper stack is turned 90° for the last time. The backgauge is only used as a lay guide in order to ensure the dimensional accuracy. Consequently, the material is preferably placed against the side gauge. In our example the fourth and final cut is made at a position of 99 cm. Finally, a programmable ejector ensures a convenient delivery of the material.

The comment "TURN 90° TO THE LEFT" means a counterclockwise turn.
When handling unprinted paper, you do not have to take the lay side into account. Therefore, you can also turn the material clockwise between the cuts. In that case, the paper stack is aligned against the left-hand side gauge. The cutting program remains unchanged.

POLAR cutting machines* offer:
- Programming devices for the daily work
- Process visualization for convenient operation
- Auxiliary functions which help to reduce production costs
- Machine functions that allow for ergonomically correct working

*Please compare the technical data relevant for the individual machine models.