1-2 To adjust the clearance between the top feed dog and the main feed dog
To feed the fabric accurately according to sewing
applications, types and/or thickness of the fabric, the
top feed dog height adjustment should be made.
With top feed dog
①
at the bottom of its stroke and
main feed dog
②
at the top of its stroke, a piece of
the fabric should be able to be placed between the
top feed dog and the main feed dog when plain
stitching is performed. Adjustment is made by
loosening set screw
③
on the top feed dog.
1-3 To adjust the top feed dog pressure
The pressure should be as light as possible, yet be
sufficient to obtain the proper stitch formation and
feed the fabric (see the illustration).
To increase the pressure, loosen lock nut
①
and
turn adjustment screw
②
clockwise.
To decrease the pressure, loosen lock nut
①
and
turn adjustment screw
②
counterclockwise.
The standard pressure can be achieved with a
distance of 23mm from the top surface of lock nut
①
to that of adjustment screw
②
.
2
