Brother rh-918a Sewing Machine User Manual


 
9. STANDARD ADJUSTMENTS
RH-981A
68
9-20. Auxiliary clamp arm (-02, -52 specifications)
Trimming of the lower thread and gimp is carried out
when the work clamps rise. The auxiliary clamp arm
(1) endures that the material does not move during
thread trimming, in order to maintain a stable thread
length after trimming.
9-21. Adjusting the cloth feeding speed (-52 specifications)
Turn the A-side needle valve (1) or B-side needle
valve (2) to adjust the cloth feeding speed.
Note: The cloth feeding speed is adjusted to an
appropriate speed at the time of shipment
from the factory, and should not be changed
unnecessarily.
At the time of shipment
A- side needle valve
At a height of approximately 9.6 mm from the
surface of the valve body (turned 6 full rotations from
the maximum height)
B- side needle valve
At a height of approximately 9.1 mm from the
surface of the valve body (turned 7 full rotations from
the maximum height)
3107Q
3108Q
3109Q
Becomes faster
Becomes slower
Becomes
slower
Becomes faster
Maximum height
(approx. 11.6 mm)
Approx.
9.1 mm
Approx.
9.6 mm