6. ASSEMBLY
RH-9820
82
F
Belt tension adjustment for driving looper belt
<Standard installation when belt is tensioned>
Attach the timing belt (22) so that the distance
from reference line (A) (for installation: 65
°
position) on the looper base (b) to reference line
(B) on the bed is 5 mm or less when (d) of the
theta M pulley assembly (18) is touching against
the motor stopper (23), and then adjust tension
pulley (28) to the appropriate tension.
<Belt tension adjustment>
1)
Place the timing belt (22) onto the looper base
(b), driving looper shaft assembly (9) and theta
M pulley assembly (18), and then provisionally
install the tension pulley (28) so that it is gently
pressing against the timing belt (22).
2)
Pull the tension pulley (28) in the direction of
the arrow
to adjust the belt tension so that
it is within the ranges given below.
・
When using a new belt: 80 - 90 N
・
When reusing an old belt: 60 - 70 N
3)
Check that the mechanism is at the <Standard
installation when belt is tensioned> position
given above at this time. If the reference lines
are more than 5 mm apart, readjust the
mechanism.
* Be sure to use a belt tension gauge to measure
the belt tension, and measure at the position
shown in the illustration
.
* The belt tension gauge should be set to
measure a unit weight of 0.04 kg/m, a belt width
of 10 mm and a span length of 136 mm.
NOTE:
If you do not have a belt tension gauge, use a
push-pull gauge to push tension pulley (28) in
the direction of the arrow with a force of 65
N, and then tighten the two socket bolts with
washers
(31).
Measurement
position
1197B
0928B
0929B
Measurement position
Summary of Contents for RH-9820
Page 7: ...RH 9820 v Belt cover Rear 0331B 0332B 0334B 0486B 0485B 0333B ...
Page 46: ...4 MECHANICAL DESCRIPTIONS RH 9820 37 ...
Page 58: ...5 DISASSEMBLY RH 9820 49 5 10 Lubrication 1089B ...
Page 124: ...6 ASSEMBLY RH 9820 115 6 19 Covers 1064B ...
Page 210: ...8 ELECTRICAL MECHANISM 201 RH 9820 PMD P C board Power supply motor P C board 0693B 4593Q ...
Page 211: ...8 ELECTRICAL MECHANISM 202 RH 9820 Panel P C board 0694B ...
Page 217: ...8 ELECTRICAL MECHANISM 208 RH 9820 0761B ...
Page 218: ...8 ELECTRICAL MECHANISM 209 RH 9820 0762B ...
Page 236: ...SERVICE MANUAL RH 9820 I6100920B 2007 03 B 1 Printed in Japan ...