Standard Adjustments; Adjusting The Needle Bar Height Adjustment; Adjusting The Needle Bar Lift Amount - Brother BAS-343E Instruction Manual

9. Standard adjustments

9. Standard adjustments
Maintenance and inspection of the sewing
machine should only be carried out by a
qualified technician.
Ask your Brother dealer or a qualified elec-
trician to carry out any maintenance and in-
spection of the electrical system.
Turn off the power switch and disconnect the
power cord from the wall outlet at the follow-
ing times, otherwise the machine may oper-
ate if the foot switch is depressed by mis-
take, whicn could result in injury.
• When carrying out inspection,adjustment
and maintenance
• When replacing consumable parts such
as the rotary hook and knife

9-1. Adjusting the needle bar height adjustment

Turn the machine pulley to move the needle bar to the lowest position. Then remove the rubber plug w, loosen the
screw e and then move the needle bar up or down to adjust so that the second reference line from the bottom of the
needle (reference line A) is aligned with the lower edge of the needle bar bush q.

9-2. Adjusting the needle bar lift amount

Turn the machine pulley to raise the neddle bar from the lowest position until the lowest reference line on the needle
(reference line B) is aligned with the lower edge of the needle bar bush q. Then loosen the screw w and move the
driver to adjust so that the tip of the rotary hook is aligned with the needle center line.
32
CAUTION
q
A
DP 17
q
B
DP 17
BAS-343E
Hold the machine head with both hands
when tilting it back or returning it to its origi-
nal position. Furthermore, after tilting back
the machine head, do not push the face plate
side or the pulley side from above, as this
could cause the machine head to topple over,
which may result in personal injury or dam-
age to the machine.
If the power switch needs to be left on when
carrying out some adjustment, be extremely
careful to observe all safety precautions.
If any safety devices have been removed,
be absolutely sure to re-install them to their
original positions and check that they oper-
ate correctly before using the machine.