JUKI AMS-210EN Series, Руководство инженера

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If the main shaft eccentric cam is not secured, the main shaft eccentric
cam should be positioned first.
1. Loosen 2 set screws securing the crank balancer .
2. Remove 4 set screws , then remove the crank rod cover .
3. Turn the main shaft in the forward direction
A
so that the needle bar
lowers and the clearance between the needle bar connecting
and needle bar lower bushing is 4.6 mm.
4. Secure the crank balancer with 2 set screws under the condi-
tions that 2 set screws securing the balancer are horizontally
positioned and the balancer is moved in the direction of Arrow
B
to make it into contact with the main shaft eccentric cam . For
tightening 2 set screws , tighten them alternately.
– 12 –
Adjustment Procedures Results of Improper Adjustment
o If the mounting angle of the crank
balancer is wrong, vibration
during sewing will be intensified.
o If the sewing machine is used for
a long time under the condition of
wrong securing position, the life
of main shaft bearing may be
shortened.
o If the crank balancer is not
moved in the direction of Arrow
B
, it may interfere with the sew-
ing machine frame.