GM · CONVERTING UNIT
19
If the spot varnish option is installed in the machine, it can be activated with the 'Use spot varnish'
checkbox. In addition, the exact size of the spot varnish cylinder must be keyed in, either in "teeth", or in
mm (or inches). The two radio buttons select which unit is used. If the cylinder is a regular cylinder,
divisible in teeth, use the 'Spot varnish cylinder teeth'. The range is 80 .. 152 z.
The cylinder could also be a little bit larger than the exact z value (up to 1 z larger in circumference). In
this case, use the 'Spot varnish cylinder size'. The range is 254.0 .. 482.6 mm (10.000 .. 19.000").
If the 'Automatic slow run' feature is on, the varnish roller will lift from the web, and turn slowly, in order
to keep the varnish in motion, when the web is not moving. However, all safety covers on the varnish
station must be closed. Otherwise the varnish rollers will stop.
The 'Rewinder 1 high torque' and 'Rewinder 2 high torque' options select the torque range for the two
rewind spindles. High range (box checked) is normally used for heavy webs, or webs that have not been
die-cut. Low range (box unchecked) is normally used for die-cut and stripped webs.
The range setting for each rewinder can be seen on the main screen. A blue 'L' means low range, and a
red 'H' means high range.
The 'Use tension roller' feature can be used only if the tension roller option is installed. It ensures a
nearly-constant web tension on the laminating foil. This can be necessary in cases where the laminated
material is cut out in sheets immediately after processing in the converter. In some cases, the end product
will bend one way or the other if there is the difference between web tension between the web and the
foil is significant.
The tension readout is on the main screen, next to the laminate spindle symbol. The readout shows only
the downward force on the tension roller, not the actual web tension. If the tension roller is not installed,
the readout will always show 0 N.
