UBI EasyCoder 501 – Service Manual
38
7. TRANSFER RIBBON MECHANISM, cont'd.
7.3
Ribbon Rewind Unit,
cont'd.
1
/. Refer to Appendix 2 for a description of
how to check the brake torque.
To remove the unit, remove the two screws that hold the flange and
pull the belt off the gear wheel. Then dismantle the gear wheel by
removing the circlip. Now you can pull the remaining parts of the
unit out into the paper compartment.
To dismantle the unit further, remove the #T20 Torx screw and
washer at the end of the shaft and pull off the bobbin, the compres-
sion spring and the nylon washer. Then you can inspect the friction
felt. No further dismantling is normally required.
Reassemble in reverse order, making sure that the one-way clutch
in the gear wheel works in the correct direction. Finally, fit the belt
over the gear wheel, adjust the tension of the belt as described in
chapter 8.4, and tighten the screws that hold the flange.
The braking torque can be adjusted by adding or removing washers
at the outer end of the shaft and should be adjusted to 160
±
10 Nmm
at 20
°
C
1
.
#T20 Torx Screw
Washers
Compression Spring
Slide Bearing
Slide Bearing
Bobbin
Bobbin Plate
Shaft
Circlips
Friction Felt
Grub Screw
Carrier
Gear Wheel
Ball Bearing
Flange
Ball Bearing
Spring
Washer
Washer
0–4 Torque Adjustment
Friction Plate
0–1 Torque Adjustment
