Owner's Manual

LK3-B438E Mark II

2±0.5mm

(Approx.

30mm)

Approx.

20mm

10-11. Adjusting the needle up stop position

The needle up stop position is adjusted so that the

index mark w on the machine pulley q is inside the

mark r on the belt cover e.

If adjustment is necessary, loosen the screw t at the

“U” mark of the machine pulley q and adjust the po-

sition of the machine pulley q. The machine pulley q

stops later if it is turned clockwise, and it stops earlier

if it is turned counterclockwise.

NOTE:

The screw y at the “D” mark is an adjusting screw for

the needle down detection function and is adjusted to

match the feed timing, so it should not be loosened.

The screw u is a screw for detecting the machine stop

position, and should not be loosened.

* If the index mark w is not inside the mark r when

the sewing machine is started, error code “E-50”

will be displayed. Turn the machine pulley to move

the index mark w to the correct position and then

start the sewing machine.

10-12. Adjusting the thread wiper

1. Loosen the set screw w and move the wiper arm support e up or down to adjust so that the clearance

between the top of the thread wiper and the needle point q is 2 ± 0.5 mm when the thread wiper is aligned

with the center of the needle.

* Before carrying out this adjustment, check that the needle bar is lowered 3.5 to 4 mm from the needle up

stop position when the sewing machine stops.

2. Loosen the screw r and move the thread guide connecting plate t up or down so that the thread wiper

is approximately 20 mm from the needle when it is at the standby position.

10 . STANDARD ADJUSTMENTS