SATO CL608 - Ribbon Clutch Tension Adjustments

PN 9001024
Rev. B Jan. 2000
Page 5-2
SATO CL608 & CL612 SERVICE MANUAL
SECTION 5 – Mechanical Adjustments
5-2 Ribbon Clutch Adjustments
Excessive ribbon unwind 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 unwind and rewind
tensions are within specifications or if adjustment of either clutch is necessary.
5-2.1 Ribbon Unwind Clutch Adjustment
Required Equipment:  1 Kg Tension Gauge
 Ribbon Core, empty
 String
 12mm Wrench
 #2 Pozidrv Screwdriver
STEP PROCEDURE
1. Connect the power cable to the printer and AC outlet. Turn the printer
ON.
2. Raise the main cover and remove the ribbon if installed. Fig. 5-1
3. Attach string to an empty ribbon core and place on the Ribbon Unwind
Spindle. Wind the string tightly around the ribbon core in a single layer
and in a clockwise direction. Attach the free end of the string to the
tension gauge. Fig. 5-2 & 5-3
4. Gradually lift the tension gauge, pulling the string to unwind it from the
core. Once the spindle begins to move, the gauge should indicate 600 to
800 grams of tension. Excessive or insufficient tension must be corrected
by adjusting the Ribbon Unwind Clutch. Fig. 5-2 & 5-3
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.
Fig. 5-1
RAISE THE
MAIN COVER