20
20
3 Adjustments
3.1.2
Measuring the Breaking Force of the Unwinder
1
2
A
B
C
3
1
2
3
1
2
3
Fig. 14
Measuring the breaking force of the unwinder
Target Value
Measurement
Torque M
Force F
Break of the unwinder ribbon
C
3,9 - 4,5 Ncm
1,3 - 1,5 N
1. Insert the test device (3) onto a ribbon retainer (2). Note that the Spring tip must be placed in the grove of the
ribbon retainer for a true result.
2. Open the printhead assembly group and insert the ribbon retainer (2) with the inserted test device (3) onto the
rewinder.
3. To measure the breaking force wrap the string around the test device (3) as illustrated in
C.
4. Connect the spring scale [10 N] (1) to the end of the string and pull it upwards vertically until the test device starts
to turn.
5. Pull until the test device complete a full revolution and measure the force F of the break.
6. If the results deviate from the target values change the settings.(
3.2 on page 21).
