37 |
Sailrite�com
Leatherwork
®
Guidebook
| 38
Needle Issues
The needle is breaking
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�
The balance wheel rotates, but the
needle does not penetrate the fabric
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�
1� Make sure the Posi-Pin (
A
) is fully inserted�
2� If slipping still occurs, remove the Posi-
Pin (
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�
Bobbin Winding Issues
The bobbin is not filling evenly, either
too much thread on the top or bottom
Locate the bobbin tensioner (
D
) and loosen the
screw (
E
) just under the tensioner on the front
of the machine� Move the tensioner down if the
bobbin is filling with too much thread on the
top� Move the tensioner up if there is too much
thread on the bottom� Tighten the screw after
correct positioning�
The bobbin winder stops before the
bobbin is full or after the bobbin has
too much thread
1� There is a bobbin stop (
F
) right next to the
bobbin winder� Simply loosen the screw
found on top of the black lobe and turn the
stop to change the thread fill level.
The closer the lobe is to the bobbin the
less it will fill, the further away the more it
will fill.
A
44
A
B
C
45
D
E
F
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