Brother DB2-DD7100, Service Manual

Page: 79 / 153

7. ADJUSTMENTS
SL-710A
72
7-13. Adjusting the treadle
Adjusting the treadle pressure
If the machine starts running at low speed when your foot
is simply resting on the treadle, or if the treadle pressure
is felt to be too weak, adjust the position (a to c) at which
the treadle spring (1) is hooked onto the treadle lever (2).
*
The treadle pressure will increase from position a to
position c.
Adjusting the treadle return pressure
1. Loosen the nut (3) and turn the bolt (4).
The treadle return pressure becomes heavier as the
bolt (4) is tightened, and it becomes lighter as the bolt
(4) is loosened.
2. Tighten the nut (3).
Adjusting the treadle stroke
Remove the nut (5), and then move the connecting rod
joint (6) from the position in figure A to the position in
figure B. The treadle stroke will then be increased by
approximately 27 %.
*
This adjustment will also affect the treadle pressure
and the treadle return pressure, so these setting
should be readjusted if necessary.
0939M
(4)
(3)
(1)
(2)
a b c
0940M
(5)
(6)
(5)
(6)
B
A