35 |
Sailrite�com
Leatherwork
®
Guidebook
| 36
There are thread loops on the
underside of the leather/fabric
A tangle on the bottom side of the
application means there is not enough
upper tension� More than likely, the
thread is not being pulled snugly
between the tension disks (p� 28,
34
H
and
G
) on the Upper Tension Assembly
or is not between them at all�
1� Lift the presser foot to push the two upper
tension disks apart�
2� Firmly pull the thread against the center
shaft between the disks�
3� Drop the presser foot� The disks should
close on the thread creating plenty of
tension� Gently pull on the thread to feel the
tension�
4� If this did not solve the problem, pull the
cover knob off the Upper Tension Assembly
and turn the knob found underneath to the
point where its outer surface has three
threads of the tension post showing� Then
repeat steps 1-3�
Thread loops could also be caused by a burr
on the Retaining Ring Cap Spring (p� 34,
40
B
)�
Remove any burrs by polishing them with emery
paper or a fine file. If badly damaged, replace
with a new Retaining Ring Cap Spring (#1603)�
Thread pulls out of the needle eye
when starting to sew
Confirm that the needle eye is threaded from
left to right (p� 11,
10
K
)� Then pull out a longer
thread tail and trap it with your finger to the bed
of the sewing machine (
A
)� Release the thread
tail after the first few stitches.
A rat’s nest forms in the first few
inches of sewing and then clears up
Eliminate this issue by trapping the thread tails
(
A
) from the needle and the bobbin as you
start to sew�
41
When stopping to turn a corner,
the machine skips a stitch
At the corner, bury the needle to the bottom
of its travel and allow it to rise 1/8 inch� In this
spot, raise the presser foot and then pivot the
work on the needle to change sewing direction�
Drop the foot to continue sewing� Follow this
process to achieve the best quality corner stitch
and minimize the skipping of stitches at turns�
When removing fabric from under
the machine it pulls hard and
three strands of thread come up
through the throat plate
This usually happens when fabric is being
removed during the middle of a stitch cycle�
The hook under the machine still has a loop of
thread around it�
Before removing fabric from under the machine,
manually turn the machine forward until the
take-up arm (p� 11,
10
H
) has just passed the
top of its travel� This allows the hook to release
the thread loop and proper upper tension to be
applied to finish the stitch.
42
43
A
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