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(8) Adjustment of looper movement locus
Looper shaft
extremely advanced
2.4mm
Looper shaft
extremely retreated
Avoid gauge
and plunger
positioned in the same face
Right direction
1/3 to 1/4
Right needle
Top direction
Down direction
Standard Adjustment
1. Turn the pulley in forward direction and mount the avoid gauge
when the looper shaft
stays in the
extremely retreated position. At that time, confirm that the face of the plunger
has coincided with that of
the avoid gauge
. Turn the pulley further in forward direction to move the looper shaft
forward. At the
same time, the plunger
also moves forward.
When the looper shaft
stays in the extremely advanced position, check whether the standard dimension
of 2.4mm has been secured in the position where the plunger
is protruded extremely.
2. When the looper avoid gauge is not used
When the standard looper
is installed and it is moved from the right to the left, the standard condition can
be attained when the tip of the right needle touches the point apart by 1/3 - 1/4 from the rear bottom face of
the standard looper
.
(Caution) When the avoid gauge
is not used, the looper locus cannot be checked unless the
presser, the throat plate, and the feed dog are dislodged.
Left direction
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
