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(4) Crank balancer positioning
Standard Adjustment
[Rotating direction]
When the needle bar lowers and the clearance between the needle bar connecting and the needle bar
bushing, lower is 4.6mm, the two set screws of the crank balancer assume the horizontal condition.
[Axial direction]
Keep the close contact with the main shaft eccentric cam and the crank balancer .
A
B
4.6mm
(5) Lower shaft backlash adjustment and connection/disconnection
Standard Adjustment
1. Size of lower shaft backlash is 0.1mm at the tip of the driver . The shaft is required to rotate smoothly.
2. Define the stop position of the lower shaft so that the set screw settles almost in the center of the flat
section of the lower shaft .
0.1mm or less
Face A
C
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