7. ADJUSTMENTS
RH-9820
170
7-25-2. Adjusting the cutting pressure
Adjust the cutting pressure to a suitable pressure so that the threads are trimmed cleanly.
NOTE:
Do not apply excessive pressure. Excessive pressure will cause the knives to become worn or damaged.
1. Push the thread trimmer arm (1) as far as it will go in the direction of the arrow [A].
2. Loosen the two screws (2).
3. With the thread trimmer arm (1) pushed as far as it will go, move the fixed knife setting bracket (6) along the guide groove in
the direction of arrow [B] to adjust so that the position where the tip of the fixed knife (3) and the movable knife (4) first start
touching is immediately above the mark (5).
4. Once adjustment is complete, securely tighten the two screws (2).
7-25-3. Adjusting the meshing amount
1. Turn the thread trimmer link lever (1) in the direction of the
arrow until it touches the screw (2).
2. Loosen the socket bolt (3).
3. Adjust the position of the thread trimmer arm (7) so that
the tip of the fixed knife (6) is directly above the index mark
(5) on the movable knife (4).
4. Once the adjustment is complete, securely tighten the
socket bolt (3).
NOTE:
•
When tightening the socket bolt (3), check that the thread
trimmer lever arm (8) and the thread trimmer arm (7) move
smoothly with no play.
•
If the meshing amount is too small, problems with the
lower thread nipper will occur and the thread will be pulled
out at the sewing start.
0522B
0521B
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 ...