7. ADJUSTMENTS
RH-9820
179
0547B
7-27. Adjusting the gimp trailing length <-02 specifications only>
The gimp is pressed against the material by means of the twisting of the first 2 - 3 stitches at the sewing start, and is then pulled
out continuously. Because of this, if strong tension is applied to the gimp when the feed base is at the sewing position and the
gimp trailing length (<a> in the illustration below) becomes extremely short, the gimp may be pulled out of the stitches.
The gimp should be adjusted to as short a length as possible which will still allow the gimp to be securely wound around the
stitches at the sewing start and leave a length protruding from above the stitches.
NOTE: Principle of gimp pulling
When the looper base (1) turns back from 180 degrees to 0 degrees after the gimp has been trimmed, gimp thread guide
C-J (2) pulls the gimp to make it come out.
Adjustment of the gimp trailing length is necessary in the following cases.
•
When the sewing length has been changed (the gimp is trimmed at the feed base home position, so the length of <b>
will change. As a result, the gimp trailing length <a> will also change.)
•
When the type of gimp and the gimp tension have been changed (the gimp trailing length <a> will change.)
Gimp is trimmed
When looper base is turned 180 degrees When looper base has returned to 0 degrees
(Viewed from directly above)
<Adjustment method>
1. Loosen the screw (3).
2. Move gimp thread guide J (4) in the direction of the arrow
[A] to adjust so that 2 - 4 mm of the gimp protrudes from
the seam at the sewing start.
3. Once adjustment is complete, securely tighten the screw
(3).
The gimp trailing length at the sewing end is uniform because of
thread trimming.
0548B
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 ...