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BA_170-22D_A14_180704_en
Fig. 7
4.7
4.7.1
Plunger limit stop
General (Fig. 8)
A T T E N T I O N !
Danger of finger bruises through unintended actuation of
the treadle during setting works in the needle plate area.
The needle plate is upped with a cloth retainer which holds the fabric on the
plunger during the time of needle penetration.
The machine is equipped with a spring-suspended plunger, the lock tooth is
combined with a regulator screw (2), which limits the lock tooth lift-off in upward
direction Fig. 8.
This combination is described as plunger stop.
Plunger stop and spring-suspended plunger prevent that the external layers of
the sewing matter are stitched into during the sewing of cross seams and other
thickenings and that undesired markings become visible.
The locking tooth is screwed onto a support and must be adjusted in such a
way, that the sewing matter cannot shift during the needle insertion.
The correct adjustment has substantial influence on the quality of the insertion!
Summary of Contents for 170-22D
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