Adjusting The Cloth Opening Amounts - Brother RH-9820 Service Manual

7-21. Adjusting the cloth opening amounts

Adjust so that the opening amounts for the left and right work clamp plates (1) are equal.
* The cloth opening amounts should always be 0.8 mm or more on each side.
3. Use calipers to measure <a> (at both left and right).
4. Turn off the power for the sewing machine.
* The gap <a> will become wider. This opening amount is <b>.
5. Lower the work clamps, and then use calipers to measure <b> (at both left and right).
(Cloth opening amount = <b> - <a>)
6. Calculate the cloth opening amounts for both sides.
7. Carry out adjustment if the two cloth opening amounts are not the same, or if the cloth opening amount at either side is lower
than 0.8 mm. (Refer to following page.)
<Opening amount measurement method>
0515B
1. Press the TEST key (2) to turn on test mode, and then
start test operation. (Refer to "5-4. Checking the sewing
pattern in test mode" in the instruction manual.)
(When using a
2-pedal foot switch)
2. Depress the start switch (3).
*
0516B
Cloth opening amount = <b> - <a>
RH-9820
Check that the feed base moves and that the work
clamp plates (1) at left and right both open. This
opening amount is <a>.
7. ADJUSTMENTS
0517B
164