Shape Of The Shuttle Race Ring; Adjustment Of Thread Take-Up Spring - JUKI AMS-221EN Series Engineer's Manual

(45) Shape of the shuttle race ring

If wear seems to be too much around the pointed tip of the inner hook, release the shuttle race ring
confirm that the dimensions of the hatched area on the rear side are 0.3 x 8mm.

(46) Adjustment of thread take-up spring

Stroke : The movable distance of the needle thread when the needle thread is pulled in the direction
the thread take-up spring
Tension : Adjust the thread take-up spring tension in accordance with the thread tension. (Actually sew a
material and adjust the thread take-up spring tension to an appropriate value.)
Increase
Decrease
Standard Adjustment
Standard Adjustment
stops. 12 to 15 mm for S type, 12 to 18 mm for H type.
When thread knots
are made.
– 68 –
and
until
A
A
C
B