—
7
—
12. Relationship between hook motion and opener motion
1
）
Turn the balance wheel by hand and stop when the opener holder is located most remotely
from the throat plate.
2
）
Make sure gap between the bobbin case holder A and the opener is approximately 0.2 mm.
3
）
If the gap is too large or small , loosen the opener holder set screw B and adjust position of
the opener.
13. Adjusting the pressure of the presser foot
Pressure to fabric can be adjusted by turning the pressure adjusting screw.
14. Adjusting the presser foot and the walking foot
1
）
Loosen not 1, and change the position of the cam rod boss accordingly.
Highest position---The stroke is maximized.
“
A
”
Lowest position--- The stroke is minimized.
“
B
”
。
2
）
Alternate vertical motions of the walking foot and presser foot
The alternate vertical strokes of the walking foot and presser foot
·
Loosen screw
②
of the top feed crank..
·
Bring the thread take-up lever to its highest position, and lower the presser bar lifting lever. Move
top feed crank
③
to left
“
A
”
to increase the stroke of the presser foot, or to the right
“
B
”
to
increase it.
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
