16
16
2.11
Checking the Braking Force at the Ribbon Supply Hub
During printing operation the spring on the transfer ribbon supply hub functions as a brake. The braking force on the
supply hub influences the transport of the transfer ribbon.
The braking force on the transfer ribbon supply hub is measured with a test collar.
The set values for the braking force at the test collar are:
Spring on
Direction of rotation
Braking Force
Transfer Ribbon Supply Hub
any direction
1,6 - 2,0 N
1
2
3
Fig. 12
Measure braking force on supply hub -
for ink side-out transfer ribbon
1
2
3
Fig. 13
Measure braking force on supply hub -
for ink side-in transfer ribbon
1. Remove transfer ribbon from the printer.
2. Put test collar (2) on the supply hub (3).
3. Wind the cord around the test collar several times.
4. Secure spring scale (1) at the end of the cord.
5. Pull at the spring scale until the supply hub begins turning.
6. Allow the cord to unwind from the test collar at least one full turn and read the pulling force on the spring scale at
the same time.
7. Compare the braking force with the set values.
2
Replacing Assembly Units
