Relative Position Between Bobbin Case And Opener; Adjusting The Height Of The Presser Feet - Consew Sewing Machine User Manual

RELATIVE POSITION BETWEEN BOBBIN CASE AND OPENER

1. Loosen the screw (1), turn the balance wheel until the opener (2) is located at the
extreme right hand position of its travel.
2. In this position, adjust it so that the clearance between the inside edge of the opener and
the tab on the bobbin case holder is about 0.2 mm.
After the adjustment, tighten the screw securely.

ADJUSTING THE HEIGHT OF THE PRESSER FEET

1. ADJUSTMENT BY THE PRESSER BAR LIFTER
Loosen the screw (1, Fig. 11), raise the presser bar lifter and loosen the set screw (1, Fig.
23).
Move the lifting presser foot up or down as may be required so as to get the correct
height and tighten the screws securely.
2. ADJUSTING THE LIFT OF ALTERNATING PRESSER FEET
On the model 255B and 339B if the height of the lifting presser foot changes, the
momentums of the lifting and vibrating presser foot vary, thus the height of the vibrating
presser foot must be adjusted.
A. Descend the presser bar lifter, holding the vibrating presser foot (5, Fig. 4), loosen the
hexagon screw (2, Fig. 23), move the presser foot up or down as may be required.
B. Tighten the screw securely.
Normally, the momentum of the alternating presser feet is equal, but for piping work, it
is effective to adjust less momentum of the vibrating presser foot against that of the lifting
presser foot.
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