Printer User Manual

Page 5-2
Section 5. Mechanical Adjustments
SATO CL408e/CL412e Service Manual
PN 9001078
Rev. B
5.2 Ribbon Clutch Adjustments
Excessive ribbon and rewind tension will result in variable ribbon motion and could be the
cause of print quality problems.
Follow the procedures 5.2.1 and 5.2.2 to verify that the ribbon rewind and unwind tensions
are within specifications or if adjustment of either clutch is necessary.
STEP PROCEDURE
1. Switch the printer OFF and disconnect the power cable.
2. Raise the top access door and open the front access door. Remove the ribbon
and label stock if installed. Fig. 5-1
3. Attach string to an empty ribbon core and place on the Ribbon Rewind
Spindle. Wind the string tightly around the ribbon core in a single layer and in
in clockwise direction. Attach the free end of the string to the tension gauge.
Fig. 5-2
4. Gradually lift the tension gauge, pulling the string to unwind it from the core.
Once the spindle gegins to move, the gauge should indicate 950 to 1050
grams of tension. Excessive or insufficient tension must be corrected by
adjusting the Ribbon Rewind Clutch.
5. To adjust the clutch, loosen the locking screw and move the adjust nut CW for
more tension and CCW for less tension. Tighten the locking screw and repeat
steps 3 and 4 until the correct tension is achieved.
Required Equipment:  1 Kg Tension Gauge
 Ribbon Core, empty
 String
 12mm Wrench
 #2 Pozidrv Screwdriver
5.2.1 Ribbon Rewind Clutch Adjustment
OPEN THE FRONT
ACCESS DOOR
Fig. 5-1
RAISE THE TOP
ACCESS DOOR