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Adjustment Procedures
27
5-1-2 Adjustment using Heat Sensitive Film
This procedure refers to the pressure adjustment to be done at the customer’s site.
Note: as this procedure is performed using heat sensitive film (JetGuard 5 mil or
Thermashield 5 mil), the top roller temperature should be set to 120
°C (250ºF).
1. Remove any film from the machine.
2. Remove the Image Guide.
3. Cut several sheets of film from the supplyroll. The offcut size should be 43’’ by 8’’ (so it’s easy if
43’’ film is used).
4. Set the nip to its maximum position (10mm or
3/8’’).
5. Place two sheets, with their adhesive sides
facing each other, between the rollers, as
shown in figure 27.
6. Close the nip, and wait 30 seconds.
7. Open the nip to its maximum position, and
remove the sheets. Now, they’re stuck
together. Mark the sheets (using a felt tip
pen) how its position was, relative to the
machine.
A small part of the sheets is
shown in figure 28. The
footprint (the area where the
rollers touch each other) is
very clearly visible, and it
has roughly a width of
10mm (3/8’’). At either side
of the footprint, the films are
molten together partially (2)
and various air-entrapments
(3) are visible. The rest of
the two sheets is still
opaque (1).
• If the roll pressure is correct, then the footprint looks like:
The difference in width measured in the middle of the footprint, and 25mm (1’’) from either
side, must not be larger than 0.5mm (0.02’’).
If this is the case, the pressure adjustment is correct, and the side covers can be
assembled.
fig. 27
43’’
roughly
10mm (3/8’’)
Footprint
fig. 28
1
2
3