Leatherwork Guidebook - Flipbook - Page 40
Needle Issues
The balance wheel rotates, but the
needle does not penetrate the fabric
The needle is breaking
The Posi-Pin® clutch may slip if the pin is not
pushed all the way into the bushing hole that
locks the bushing to the balance wheel or if the
bushing itself is loose.
Ensure the needle is large enough for the
thickness and type of leather being sewn. Also
make sure the point of the needle is the correct
type for the material being sewn.
Needles will also snap if there are jams or
tangles in the bobbin. Before installing your
bobbin, make sure it is wound correctly and
unwinds smoothly.
The needle hits the needle throat
plate when reversing sewing
directions
This is most likely caused by a bent needle. To
avoid bending needles when changing sewing
direction, stop the machine with the needle
positioned either at the top or bottom of its
stroke. When the needle is completely up, the
foot can move the material but cannot bend the
needle. When the needle is completely down,
the outer portion of the walking presser foot
is up and cannot move the fabric, which also
would bend the needle.
1. Make sure the Posi-Pin (A) is fully inserted.
2. If slipping still occurs, remove the PosiPin (A) and Posi-Pin nut (B) and slide the
balance wheel (C) off the bushing.
Use a 2.5mm hex key to tighten the two set
screws (p. 59, 17) that fasten the bushing to
the machine’s upper shaft, then reinstall the
balance wheel and check for proper operation.
44
A
C
B
A
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