– 40 –
(16) Knife adjustment
Front corner section of
the lower knife
right
Left side face of the
presser main body
left
Right side face of
the presser main
body
left
Right and left directions
Right side of the
presser main body,
right
Front corner section
of the lower knife
right
Crossing size of 0.4mm
Front corner section
of the upper knife
left
Right direction
Lower face of the knife base guide
1.6mm
Top face of the mounting section for
the knife holder shank
0.8 to 1.6mm
Standard Adjustment
1) Lower knife adjustment
Insert the lower knife
from the left side of the presser main body, left. The standard size is 0.8 to 1.6mm
from the right side of the presser main body left
to the front corner section of the lower knife
right.
2) Upper knife adjustment
Turn the hand pulley in forward direction and stop the upper knife driving bracket
in the leftmost position.
Insert the upper knife
from the right side of the presser main body
right and let it cross the lower knife
. The standard crossing size is 0.4mm between the front corner section of the lower knife
right and the
front corner section of the upper knife
left.
3) Pressure adjustment of upper knife
When the upper and lower knives
and
are crossing, the standard size is 1.6mm between the lower face
of the knife base guide
and the top face of the mounting section for the knife holder shank
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
