−20 −
$3
$4
$6
$2
$5
$0
$1
Adjustment Procedures Results of Improper Adjustment
™ Adjust the timing of the looper thread cam by loosening the
two screws #9.
™ Adjust the height of the looper thread guide plate by loosening
the screw $0 and move the looper thread guide plate $1 up and
down.
Adjust the looper thread cam pawl by loosening the screw $2
and move the looper thread cam pawl $3 up and down.
Adjust the lateral relation of the looper thread guide plate by
loosening the screw $4 and move the looper thread guide plate
$1 to the left and right.
™ If the timing of the looper thread
cam is too advanced, the skip
stitching on the back of the
looper will occur. If it is too
retarded, the tightening of the
thread will be inferior.
™ If the clearance between the
looper thread cam pawl and the
wire is large, the looper thread
suddenly slackens and skip
stitching on the back side will
occur.
™ If the looper thread cam is not in
the center, the cam will be
damaged.
™ If the thread guide is raised, the
looper thread after sewing will be
slack.
™ If the thread guide is lowered, the
looper thread after sewing will be
tight.
™ Adjust the position of the thread guide by loosening the two
screws $5 and move the thread guide $6 (2 pcs.) up and down.
(Caution) Use a 3/32" hexagonal wrench for the screw #9.
From the library of: Diamond Needle Corp
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