SATO CG4 Series - Torque Limiter (Supply Unit) Replacement

Section 7: Replacement Procedures
CG4 Series Service Manual Page 7-15
7.11 TORQUE LIMITER (SUPPLY UNIT) REPLACEMENT
(Only for CG408 TT and CG412 TT Thermal transfer printer)
1.
Remove the Frame cover of the Ribbon unit as mentioned
in
Section 7.10 Ribbon End Sensor Replacement above.
Follow step 1 to 4 to remove the
Frame cover.
2. Remove the screw securing the Encoder, Torsion spring
and the
Torque limiter assembly. Remove these parts and
set them aside.
3. Disassemble the Torque limiter assembly to replace the
defective internal parts.
Remove the
screw and carefully take the parts apart. The
Torque limiter spring and the Felt plate may need
replacement.
4. After replacement, follow the above steps in reverse
sequence, to reassemble the parts.
Notes:
• When reassemble the Torque limiter assembly, be
careful on the sequence of the parts. Ensure the orienta-
tion of the
washer that the shear-drooped side goes to
the spring side.
• When reassemble the
Torque limiter assembly to the
Ribbon unit frame, attach the hook of the Torsion
spring
to the tab of Torque limiter and then slightly pull
the other hook of the
Torsion spring and attach to the
tab of the
Ribbon unit frame.
screw
Torsion
spring
Encoder
Torque limiter assembly
Shaft
Torque limiter
plate A
Felt plate
Washer
Screw
Torque limiter
plate B
Torque limiter
spring