Adjust The Speed Control Unit - Siruba C007K Manual

Needle up position : Rotate the machine pulley to reach mechanical needle up position and turn the photo
Needle down position : Rotate the machine pulley to reach mechanical needle down position and turn
Note: instruction above is the standard adjustment. If you feel the position wasn't accurate, please do
the fine tuning by yourself.

(7). Adjust the Speed Control Unit

Components of the speed control unit: see figure
A： Spring for toeing forward force adjustment
B： Bolt for heeling backward force adjustment
C： Treadle / Pedal arm。
D： Pitman Rod for Treadle / Pedal
Term of adjustment
Toeing forward
1
force adjustment
Heeling backward
2
force adjustment
Treadle stroke
3
adjustment
plate (A) until its red mark is aligned with the red mark on the bearing cover plate.
the photo plate (B) until its blue mark is aligned with the red mark on the bearing
cover plate.
Adjustment result
Spring A move to right = force increased
Spring A move to left = force decreased
Bolt B turn
Bolt B turn
Rod D secure at right = stroke is longer，
Rod D secure at left = stroke is shorter。
= force decreased
= force increased
7
increase
decrease
A
decrease increase
B
C
D