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Adjustment Procedures
Results of Improper Adjustment
Needle entry adjusting positions
1. When adjusting the right and left needle entry, remove the front top
cover and the oil receiver.
2. Loosen the collar setscrew
and move the collar
toward the
front.
3. Loosen the hexagon coupling bolt
and insert a screwdriver in the
eccentric pin
. When the screwdriver is turned to the right and left,
the cylinder arm
moves to the right and left.
4. Confirm the result of needle entry position adjustments.
5. After adjustments, tighten the hexagon coupling bolt
to return the
collar
to its initial position. Since then, tighten the collar setscrew
.
Method of confirmation
o Turning the eccentric pin
to the right causes the cylinder arm
to move to the left.
o Turning the eccentric pin
to the left causes the cylinder arm
to
move to the right.
When the needle parallelism is not
secured
o This will be a cause of stitch skip-
ping, needle breakage, thread
breakage, or destruction of throat
plate claws
as a result of get-
ting flaws.
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
