SATO TG308, Руководство по обслуживанию

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Section 7: Replacement Procedures
TG3 Series Service Manual
Page 7-13
7.8 REPLACING TIMING BELT (RIBBON)
Following long periods of use, a belt may become worn or excessively stretched beyond the printer’s
adjustment ability and require replacement. It is at this time that the pulleys should be inspected for damage
or wear.
1.
Before proceeding, switch off the printer and remove the main cover, left housing cover and the top left
housing cover to gain access to the internal (electrical and mechanism) hardware. Refer to
Section 7.1
Removal of Housing cover
for details.
2.
Unscrew five
screws
to detach the
Main (CONT) PCB bracket
from the printer frame. Refer to
Section
7.6 Replacing Torque Limiter (Ribbon Unwinder)
for details.
3.
Follow
step 4
to
step 7
of
Section 7.5 Replacing Ribbon Feed Roller, Oneway Clutch and Torque
Limiter
to remove the
Ribbon frame
from the printer. Set all the parts aside for reassemble.
4.
Loosen the adjustment screw of
tension bracket
as shown. Refer to
Section 6.19 Adjusting Timing Belt
Tension
for details.
IMPORTANT
: Do not remove the screws.
5.
Detach the
Timing belt 60 S2M 254
(2) from the
Gear Pulley_M(54/54)
(3) and replace as necessary.
6.
And then remove the
Gear Pulley_M(54/54)
(3) from the
ribbon shaft
.
7.
Detach the
Timing belt 60 S2M 386
(4) from the
Gear Pulley
(5).
8.
Detach the
Timing belt 60 S2M 322
(6) from the
Gear Pulley_K(83/83)
(7) and replace as necessary.
9.
Reverse the above procedures for reassembly.
10.
After replacement, adjust the ribbon tension according to the procedure in
Section 6.19 Adjusting
Timing Belt Tension
.
CAUTION:
A PROPERLY TENSIONED BELT WILL BE JUST ENOUGH TO PREVENT SLIPPAGE.
AN OVERLY TENSIONED BELT WILL EXCESSIVELY INCREASE DRAG ON THEIR
PULLEYS AND INCREASE COMPONENT WEAR.
5
Tension
bracket
1
Tension
bracket
1
2
3
4
6
7