6-3 Gap between Looper and Needle
Turn pulley by hand and fix eccentric cam so that
the screw (a) may be horizontal position as shown
in Fig. 5, while the looper is passing behind needle
and the sharp point of looper is corresponded with
needle center.
Afterwards, adjust the gap to be 0.05-0.1mm
between looper and needle to confirm they do not
clash with each other when the sharp point of looper
is passing behind needle.
The adjustment of the gap shall be done by
loosening screw (b) of looper oscillating arm.
6-4 Feed Dog Height (Fig. 7)
Adjust the height of feed dog to loosen screw (a) in
order to obtain the most appropriate protrusion of
1.0- 1.2mm above the upper surface of throat plate
after regulating the screw (b).
- 7 -
