Matching.the.motion.of.the.needle.guards.with.the.loop.guide; Position.of.the.looper.thread.take-Up; Position.of.the.frame.thread.eyelet - JUKI MH-486-5 Instruction Manual

. 1 7..MATCHING.THE.MOTION.OF.THE.NEEDLE.GUARDS.WITH.THE.LOOP.GUIDE

WARNING.:
To.avoid.possible.personal.injury.due.to.abrupt.start.of.the.machine,.turn.off.the.power.to.the.machine.and.check.to.be.sure.that.the.
motor.has.totally.stopped.rotating.in.prior.

. 1 8..POSITION.OF.THE.LOOPER.THREAD.TAKE-UP

WARNING.:
To.avoid.possible.personal.injury.due.to.abrupt.start.of.the.machine,.turn.off.the.power.to.the.machine.and.check.to.be.sure.that.the.
motor.has.totally.stopped.rotating.in.prior.

. 1 9..POSITION.OF.THE.FRAME.THREAD.EYELET

Loosen setscrew 4 . Adjust the position of looper thread cam 1 so that
wire 3 is visible through guide hole B when third marker line A (third
from the top) of the needle bar 2 aligns with the bottom end face of the
needle bar lower bushing.
After the adjustment, verify the following.
1. When the looper thread moves off tip C of the looper thread cam,
the needle tip fully enters the looper thread triangle.
2. In the case puckering is particularly concerned, the bottom face of
the wire aligns with the bottom end of guide hole B slightly earlier
than the normal timing.
The thread tension changes by moving intermediate thread guide 1 up
and down.
The thread tension is increased by moving the intermediate thread guide
upward, or decreased by moving it downward.
In general, adjust the position of setscrew 2 referring to the table below.
Thread used Scale on the intermediate thread guide
Cotton #80 to #50
thread #30 to #20
Synthetic #80 to #50
thread #30 to #20
–  –
2 to 3
3 to 4
1 to 2
2 to 3