Leatherwork Guidebook - Flipbook - Page 24
26
27
28
C
B
A
Adjusting Presser Foot Tension
The amount of downward pressure put on the
material by the presser foot is controlled by the
Pressure Regulating Thumbscrew (A). This screw
compresses a long coil spring above the presser
foot. Turn the screw clockwise to increase the
downward foot pressure (26). Turn the screw
counterclockwise to decrease the foot pressure (27).
When sewing a thick leather assembly, set the
regulating thumbscrew to be very loose. To do
this, turn the thumbscrew until it comes free of the
machine and then rethread it about three complete
rotations. Even with this setting, downward foot
pressure is significant because the thickness of
the material will raise the feet higher than normal,
creating substantial spring compression.
The sewn assembly may be so dense that the
needle’s extraction overcomes the presser foot’s
downward force. If this is the case, you may notice
the assembly popping up and down while being
sewn and you may be skipping stitches. To fix this,
you will need to increase the pressure by screwing
the thumbscrew down further.
21 |
Removing Material From
Under the Presser Foot
1. Stop the machine with the take-up arm (B)
at its uppermost position.
2. Raise the feet with the lift lever (C).
3. Pull the material straight back to remove it
from under the foot (28). It may be helpful
to rock the balance wheel forward and back
to free the thread.
4. Cut the two threads to free the material,
leaving at least an 8-inch length of thread
coming out of the machine.
More than two threads? See p. 36.
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