Grafisk Maskinfabrik DC330mini, Руководство по эксплуатации

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GM · CONVERTING UNIT
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Analog mode:
If analog mode is selected, the operator must enter the size of the die-cutting cylinder. The unit is "teeth"
(Z). One tooth is 1/8 inch. This figure is entered in 'Die-cutting teeth'.
Digital mode:
The die-cut station must know a few details about the cutting plate and the print, in order to operate
correctly. The first value is 'Plate size', which is the size of the cutting plate – or more accurately – the
precise distance between the printed marks. The range of possible plates is calculated like this:
The
minimum plate size is 30% of the cylinder size. Thus, shortest plate that will work on a 25" cylinder
is 190.5 mm, or 7.5".
The
maximum plate size is the full cylinder size minus 4.5". Thus, the longest plate that will work on a
25" cylinder is 520.7 mm, or 20.5".
NOTE! Be carefull with other platesizes.
The machine can handle platesizes 50.0~558.8 mm.
'Cutting plate margin' is the next value. It is the distance from the leading edge of the plate, to the first
point that will actually cut the web.
The 'Distortion factor' is used when the plate to be used is not made for the used cylinder. If a plate is
originally made for a 12" cylinder, but is used on a 25" cylinder, the labels will be too short, and the
space between frames will be too long.
This behaviour can be compensated for by changing the distortion factor to a value less than 1. This
makes the die-cut station move in a slightly different pattern, stretching the label shapes on the web.
Great care should be taken when this value is altered. Since the die-cut plate will not run at the same
speed as the web, a considerable amount of force is necessary to make the correct die-cut shape. Some
jobs are easy to distort, and others are nearly impossible. Microlabels and small circular labels cannot be
expected to run well with a plate not made for the used cylinder.
Calculation of the distortion factor is a bit too complicated, but can be done by using a spreadsheet
supplied by the manufacturer.
The distortion factor can also be used for adjusting the gap between labels, if the gap is a little bitoff,
even though the die-cut plate is manufactured for the used cylinder. The behaviour is be caused by
stretched web, thick web curving around rollers, and other mechanical factors. In this case, the distortion
factor should not be set lower than 0.9930 (heavy stress on paper and tools).
NOTE! Call support or write to GM Tech, and we will provide to your specific machine
the distortion factor.