Height Of The Moving And Counter Knives; Parallelism Of The Blade Tip Of The Counter Knife - JUKI MOL-254 Engineer's Manual

8) Height of the moving and counter knives

Perform a trial cut of two pieces each of #80 and #5 threads with the moving and counter knives (by
operating the thread trimming lever by hand after having removed the throat plate to check that the
respective pairs of threads are properly cut).
Moving knife
Throat plate

9) Parallelism of the blade tip of the counter knife

So as to cut two pieces of thread (needle thread and bobbin thread) uniformly, the surface of the
counter knife is in parallel to the throat plate installing plane.
Fig. 9-1
Standard Adjustment
Washer
Fig. 8-1
−
Hinge screw
Counter knife
0.3 to 0.4 mm
(0.011 to 0.015")
The counter knife blade is in parallel
to the throat plate installing plate.
The difference in height between
and should be 5 / 100 or less.
25
−
Moving knife
Needle hole guide
Fig. 8-2