20 20
4 Adjustments
The set values for the winding torque and the resulting pulling force at the test collar are:
Slipping clutch on Direction of rotation Printer Winding torque M Pulling force F
Ribbon take up hub clockwise A2+
A4+, A4.3+, A6+
A8+
10.2 - 10.8 Ncm
13.5 - 14.4 Ncm
17.7 - 18.1 Ncm
3.4 - 3.6 N
4.3 - 4.8 N
5.9 - 6.1 N
counterclockwise all 2.1 - 3.0 Ncm 0.7 - 1.0 N
Ribbon supply hub any A2+, A4+, A4.3+, A6+
A8+
3.6 - 4.5 Ncm
4.5 - 5.1 Ncm
1.2 - 1.5 N
1.5 - 1.7 N
Table 1 Winding torques at the transfer ribbon hubs
Fig. 19 Measuring the winding torque at the transfer ribbon take up hub (left) and supply hub (right)
Danger!
Risk of death via electric shock!
Before opening the housing cover, disconnect the device from the mains supply and wait at lease one
minute until the power supply unit has discharged.
Unplug the printer from the electrical outlet.
Remove the rear cover.
Remove the transfer ribbon from the printer.
Attach the test collar (3) to the winder (4).
Turn the knurled nut counterclockwise to clamp the test collar.
Wind the cord attached to the test collar around the test collar several times.
Secure spring scale [10 N] (1) at the end of the cord.
Move the spring scale upward vertically until the winder begins turning.
If the drive belt at the rewinder is also moving, hold it in place during the measurement. Otherwise, the
measurement is not accurate.
Allow the cord to unwind from the test collar at least one full turn and read the pulling force F on the spring scale
at the same time.
Determine the pulling force at the transfer ribbon take up hub in the same manner, except in the opposite rotation
direction (2).
If the winding torque differs from the set value, it must be adjusted 4.1.2 on page 20.
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