Standard Adjustment; Timing Relation Between The Needle And The Feed; Adjusting The Timing Relation Between The Needle Bar And Looper (Synchronization) : Without Gauges - JUKI MF-7000 Series Engineer's Manual

4. STANDARD ADJUSTMENT

(1) MF

1) Timing relation between the needle and the feed

First screw A in operating direction on double eccentric 1 of feed drive assembly must be straight
up, when the needle bar is at bottom of stroke.
2) Adjusting the timing relation between the needle bar and looper (synchronization) : Without
gauges
A
Looper
Align
Left needle
When the blade point of the looper moves to the left in the rear of the needle and to the right in front
of the needle, align the upper end of the eyelet of the left needle with the lower face of the looper so
that the distance between A and B, the side of the left needle to the blade point of the looper, should
be equal.
Standard Adjustment
1
A
A=B
Move to the left
7
− −
1
A
B
Move to the right
Looper
Left needle