Needle Bar Height - Brother STAR240E Service Manual

8.

NEEDLE BAR HEIGHT

STANDARD
For left straight line sewing, when the needle outer edge and rotary hook assembly point match, the distance
from the needle hole top edge to the rotary hook assembly point lower edge should be 1.0-1.4 mm.
ADJUSTMENT
1. Turn the zigzag dial to maximum.
2. Turn the balance wheel to the position that which the needle outer edge and rotary hook assembly point
match.
3. Loosen the screw securing the needle bar holder.
4. Move the needle bar up and down and align within the range 1.0-1.4 mm.
5. Tighten the screw securing the needle bar holder.
Adjustment Points
5. When adjusting the needle bar height, the needle bar is turned easily and this can cause obstructions to
sewing. When adjusting, be careful that the front surface of the needle holder.
After adjusting the needle bar height, check the threading hook vertical position.
[Adjustment Procedure 29]
If the needle bar height is too high or too low, skipped stitches, split thread, or cut thread may occur.
* Adjust the needle and rotary hook assembly timing before adjusting the needle bar height.
Threading hook
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Needle bar holder
Needle holder
-39-
1.0-1.4 mm
0 mm