Adjusting The Synchronizer; Installing The Belt Cover - JUKI LB-6 Manuel D'utilisation

2. Adjusting the synchronizer

(1) Adjusting procedure with the built-in synchronizer
Perform the work with the power OFF except when checking the stop position.
[Needle-up position]
1) Turn the handwheel by hand to bring the needle bar to its lower dead point position.
2) Keep the hands off the sewing machine and turn ON the power in the state that it is safe even when the
sewing machine starts.
The sewing machine stops after about a half rotation. This position is the up-stop position of the sewing
machine.
3) Adjust the position so that the up-stop position is in the left travel end of the upper looper.
[Needle-down position]
The standard position of DOWN stop position is the state that the guide section is adjusted to the movable
section.
[Adjusting procedure]
1) Remove the hand pulley.
2) Loosen setscrews 1 or 2 and turn the movable section clockwise to advance the stop position.
After the adjustment, securely tighten the setscrews.
(Setscrews 1 : for UP stop position, setscrews 2 : for DOWN stop position)
3) When the adjustment is completed, attach the hand pulley and the belt cover.
For adjusting the needle-up stop position
Movable component
Guide
Guide
Movable component
For adjusting the needle-down stop position

(2) Installing the belt cover

Bore a hole in the belt cover through which a cord is to be passed.
30
(For DOWN stop position)
Cut this section with a pair of pliers or the like.
(If the section has burrs, shave them off.)
Pass the sensor cord through the hole.
• Attach the belt cover to the table and put the belt in position. Then, put
the belt cover onto the belt.
1
(For UP stop position)
Retards
2
Retards
Advances
Stop position
Advances