Adjustments, settings and alignments
Compa II series
28 Service
instructions
11.15
6.2 Measuring the winding torques at ribbon
rewinder/unwinder
Measurement of the winding torque at the transfer ribbon take up and
supply hub occurs by determining the pulling forces on a test collar
attached to the winder.
The physical relation between the torque and the pulling force is:
F = M / r
F = traction [N]
M = rewind torque [Ncm]
r = radius of test collar (30 mm)
Compa II 104,
Compa II 106:
M
Auf
= 13,5 - 15,0 Ncm
F
Auf
= 4,5 - 5,0 N
Compa II 162:
M
Auf
= 21,0 - 22,5 Ncm
F
Auf
= 7,0 - 7,5 N
Compa II 104,
Compa II 106:
M
Ab
= 4,0 - 4,5 Ncm
F
Ab
= 1,3 - 1,5 N
Compa II 162:
M
Ab
= 6,0 - 7,0 Ncm
F
Ab
= 2,0 - 2,3
Figure 17
1. Unplug the printer from the electrical outlet and remove the rear
cover.
2. Remove the transfer ribbon from the printer.
3. Attach the test collar (3) to the winder (4).
4. Turn the knurled nut counter clockwise to clamp the test collar.
5. Wind the cord attached to the test collar around the test collar
several times.
6. Secure spring scale [10 N] (1) at the end of the cord and move the
spring scale upward vertically until the winder begins turning.
7. If the drive belt at the rewinder is also moving, hold it in place
during the measurement. Otherwise, the measurement is not
accurate.
8. 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.
9. Determine the pulling force at the transfer ribbon rewinder in the
same manner, except in the opposite rotation direction (2).
If the winding torque differs from the setpoint, it must be adjusted.
Setpoints for transfer
ribbon rewinder
Setpoints for transfer
ribbon unwinder
Summary of Contents for COMPA II
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