JUKI AMS-221EN Series Engineer's Manual page 19

Adjustment Procedures
If the main shaft eccentric cam
cam should be positioned first.
1. Remove 4 setscrews
2. Loosen 2 setscrews
3. Turn the main shaft in the forward direction
lowers and the clearance between the needle bar connecting
and needle bar lower bushing
4. Secure the crank balancer
tions that 2 setscrews
positioned and the balancer
to make it into contact with the main shaft eccentric cam
tightening 2 setscrews
is not secured, the main shaft eccentric
, then remove the crank rod cover
securing the crank balancer
so that the needle bar
A
is 4.6 mm.
with 2 setscrews
securing the balancer
is moved in the direction of Arrow
, tighten them alternately.
o If the mounting angle of the crank
.
o If the sewing machine is used for
.
under the condi-
are horizontally
B
. For
– 15 –
Results of Improper Adjustment
balancer is wrong, vibration
during sewing will be intensified.
a long time under the condition of
wrong securing position, the life
of main shaft bearing may be
shortened.