Service manual

Page 5-4
Section 5. Mechanical Adjustments
PN 9001080
Rev. A
SATO M-8485Se Standard Print Engine
Service Manual
5.2.2 Ribbon Rewind Clutch Adjustment
To adjust the Ribbon Rewind Clutch, perform the following steps:
STEP PROCEDURE
1. Place an empty ribbon core on the ribbon wind spindle. Attach the free end of
the string to the tension gauge. Fig. 5-1, 5-2
2. Wind the string tightly around the ribbon core in a single layer and in a CCW
direction. Attach the free end of the string to the tension gauge.
3. Gradually lift the tension gauge, pulling the string to unwind it from the core.
Once the spindle begins to move, the gauge should indicate 500 to 700 grams
of tension. Excessive or insufficient tension must be corrected by adjusting
the ribbon unwind clutch.
To adjust the clutch, loosen the set screw and move the adjust nut to get the
correct tension. Tighten the set screw and repeat Steps 3 and 4 until the
correct tension is achieved.