Brother b831 - Stitch Length Adjustment

[n] THREAD WIPER ADJUSTMENT
y
About 0 3 mm
0.3 mm
Set the switch to the needle up stop position and the feed adjustment dial to position 2.
Set the needle to the needle up stop position.
Loosen the four screws O. and raise or lower the solenoid O until the tip of the thread wiper O projects about 0.3 mm
from the needle point when it is pressed with your finger as shown.
Make sure that thread wiper link BO will notcontact the presser bar.
Pass the threads through the needles.
Loosen the screws 0 and move the thread wiper O to the right or left so that the thread wiper O will positively hook the
threads with its hooked end.
About 1 mm
Solenoid plunger
More
0
Less
Loosen the screws O. and raise or lower the stopper O until the clearance between the tip of thread wiper O and the
presser set screw is about 1 mm when the thread wiper returns to its original position
If the clearance is too little, the thread wiper O may not be able to hook the threads depending on the kind of thread. Set
the thread wiper O as close to the needles as possible, provided that the threads will positively pass through the work.
Also check that the needle set screws will not contact the thread wiper O-
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