JUKI TL series Service Manual page 27

3. Thread trimmer cam timing (Needle-to-cam position)
○ Loosen setscrews in ❶ thread trimmer auxiliary
cam, ❷ thread trimmer cam and ❸ roller holding
cam.
○ Lower needle bar by 37˚ (1.95 mm) from its upper
dead point.
○ In this state, fix hook driving shaft and perform
positioning of cams of ❶ , ❷ and ❸ .
3-1 Positioning of [thread trimmer auxiliary cam]
○ Make shaft at top end of ❹ thread trimmer auxil-
iary link of solenoid asm. come in contact with ❶
thread trimmer auxiliary cam and tighten it with
setscrew.
3-2 Positioning of [thread trimmer cam]
○ Face front ❺ setscrew No. 1 in thread trimmer
cam.
○ Enter ❻ thread trimmer cam contactor shaft to
groove in ❷ thread trimmer cam.
○ Slightly pressing thread trimmer cam to hand-
wheel side, turn it in reverse direction.
○ Tighten thread trimmer cam with setscrews at
place where idling term of cam groove (place
where rotation is hindered) is finished.
3-3 Positioning of [roller holding cam]
○ Turn pin of link support plate and make it come in
contact with concave portion of ❸ roller holding
cam.
○ For lateral position, make ❸ roller holding cam
come in contact with ❶ thread trimmer auxiliary
cam and tighten it with setscrew.
3-4 Securely tighten setscrews in respective cams
❹ Thread trimmer auxiliary link
❷ Thread trimmer cam
❻ Thread trimmer cam
contactor shaft
Link support plate
25
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❶ Thread trimmer auxiliary cam
❺ Setscrew No. 1
Setscrew No. 2
❸ Roller holding cam
Convex portion