Brother PE-300S, Service Manual

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7. NEEDLE BAR HEIGHT
STANDARD
While in test mode (3) 3-point needle drop, select left needle drop, turn balance wheel with your hand so needle
(#11 needle) meets that outer rotary hook point. At this time, the distance between the top of the needle eye and the
bottom of the rotary hook point should be 1.0-1.4mm.
ADJUSTMENT
1.
Set machine to test mode and select (3) 3-point needle drop.
2. Press the mark on the screen to move the needle position to the right.
3. Turn balance wheel so that needle meets outer rotary hook point.
4. Loosen needle bar clamp screw.
5. Raise and lower needle bar and adjust distance between top of needle eye and bottom of outer rotary hook
point so that it is between 1.0-1.4mm.
6. Tighten needle bar clamp screw.
Adjustment Points
* When adjusting needle bar height, needle bar may turn easily, this could make sewing difficult. When
making these adjustments, make sure that front of needle clamp and feed dog grooves of needle plate
meet at a 90 degree angle.
* After adjusting needle bar height, check the vertical position of needle threading hook.
(1) If needle bar is set at wrong height, skipped stitches, split thread, and thread breakage may result. (see
illustration below)
3-point needle drop screen
1.0-1.4mm
0mm
5
3
6
4
D C B
A