Adjusting The Clearance Between The Loopers And Needle; Adjusting The Needle Guard - Brother RH-9820 Instruction Manual

9. STANDARD ADJUSTMENTS

9-7. Adjusting the clearance between the loopers and needle

If the needle count has been changed, always be sure to check the clearance between the needle and the loopers, and adjust
the clearances if necessary. These adjustments should be made for both the inside sewing position and outside sewing
position.
(Inside sewing position)
0492B
Turn the upper shaft pulley (1) so that the tips of both the left and right loopers (2) are aligned with the needle center, and then
loosen the set screws (3) and adjust the clearances between the needle and the tips of the loopers (2) to 0.01 - 0.08 mm.
* These clearances must be uniform while the looper base is rotating (through 360 degrees). If they are not uniform, adjust
the center of rotation of the needle bar. (The center of rotation is already adjusted at the time of shipment from the factory.)
* After making this adjustment, carry out the adjustment procedures given in "9-9. Adjusting the spreader installation
positions".

9-8. Adjusting the needle guard

If the needle count has been changed, always be sure to check the position of the needle guard, and adjust the position if
necessary. This adjustment should be made for both the inside sewing position and outside sewing position.
(Inside sewing position)
0498B
Turn the upper shaft pulley (1) so that the tips of both the left and right loopers (2) are aligned with the needle center, and then
loosen the screw (5) and adjust the needle guard (3) so that it touches the needle (4).
NOTE:
If it crosses the needle more than necessary, it will place a load on the needle and this may cause the needle to break.
Alternatively, if it does not cross the needle at all, the tips of the loopers will interfere with the needle and skipped stitches
may occur.
79
(Outside sewing position)
(Outside sewing position)
RH-9820
0.01 - 0.08mm
0493B
0499B