Print Head Gap Adjustment - CPG Compuprint SP 40 Maintenance Manual

Maintenance Manual

8.2 Print Head Gap Adjustment

This adjustment is required only if the platen assy is removed.
Its verification it is also recommended when some parts of the mechanical assy related to the gap are removed and
the distance between the print head needles / AGA wheel and the platen is changed.
To assure the correct parallelism and the correct gap between platen and AGA wheel, follow this procedure:
1) Remove the top and the main cover.
2) Remove the inked ribbon cartridge.
3) Loose the allen screws (item 19 of figure 8.2). The platen assy will slide in the lowest position.
4) Move the print head in the right most position.
5) Keeping the allen screwdriver on the screw on the right side, gently rise the platen until it touch the
AGA wheel.
6) Gently fix the allen screw. Just to fix the position.
7) Move the print head in the left most position.
8) Keeping the allen screwdriver on the screw on the left side, gently rise the platen assy until it touche
the AGA wheel.
9) Gently fix the allen screw. Just to fix the position.
10) Move the print head in the right most position.
11) Gently loose the allen screw on the right side. Keeping the allen screwdriver on the screw, fix it as
soon as the contact position between AGA wheel and platen assy (without any other force) has been
found.
12) Move the print head in the left most position.
13) Gently loose the allen screw on the left side. Keeping the allen screwdriver on the screw, fix it as soon
as the contact position between AGA wheel and platen assy (without any other force) has been found.
REMARK:
Due to te fact that the platen assy is movable on its supports (there are two springs which maintains the platen in its
correct position) check for the correct platen free movement (down by pressure and up by springs release) by force it
both on the right and on the left side.
Rev. 005
128
Chapter 8
Mechanical Adjustments
SP 40