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6-13) Problems with
13-A) Throat plate stitch tongue
A-1) Not smooth thread running
Perform modification or replace the deformed
chain-off thread
due to blunt throat plate
part.
stitch tongue
13-B) Upper fancy looper adjustment
B-1) Upper fancy stitch skipping
Refer to the standard adjustment values.
due to insufficient fancy
thread carrier adjustment
13-C) Fancy thread carrier adjustment
C-1) Upper fancy stitch skipping
Refer to the standard adjustment values.
due to insufficient fancy
thread carrier adjustment
13-D) Lower looper adjustment
D-1) Lower fancy stitch skipping
Refer to the standard adjustment values.
due to insufficient lower
looper adjustment
13-E) Upper fancy cam position
E-1) Stitch skipping due to
Refer to the standard adjustment values.
improper upper fancy
removal position from
cam top point
13-F) Minor presser
F-1) Use of minor presser
There are two types of minor pressers.
designed for thinner
Replace the mounted minor presser with another
materials to sew material
minor presser for thicker materials.
with different thicknesses,
Remove the dust.
dust accumulated inside
minor presser
13-G) Needle thread tension
G-1) Insufficient needle thread
Increase the thread tension.
tension
13-H) Threading
H-1) Threading error
Refer to "6. How to conduct threading".
13-I) Upper fancy thread tension
I-1)
Insufficient thread tension
Increase the thread tension.
13-J) Presser foot pressure
J-1) Insufficient presser foot
Adjust the presser foot pressure properly.
pressure
13-K) Feed dog
K-1) Scratch on the feed dog
Perform modification or replace the part.
Trouble (1)
Trouble (2)
Cause (1)
Cause (2)
Check and corrective measures
From the previous page
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
