Brother BE-438HS, Service Manual

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9. ADJUSTMENT
135 KE-430HX/KE-430HS, BE-438HX/BE-438HS
9-1-3. Arm thread guide C
The standard position of arm thread guide C (1) is when the
screw (2) is aligned with the position of the reference line.
To adjust the position, loosen the screw (2) and then move
arm thread guide C (1).
・ When sewing heavy-weight materials, move arm thread
guide C (1) to the left. (The thread take-up amount will
increase.)
・
When sewing light-weight materials, move arm thread
guide C (1) to the right. (The thread take-up amount will
decrease.)
9-1-4. Needle bar bush thread guide D
Check that needle bar bush thread guide D (1) is at the
middle of the needle bar (2).
NOTE:
If needle bar bush thread guide D (1) is not in the correct
position, the thread may pull out or skipped stitches may
occur.
9-2. Adjusting the needle bar height
1. Loosen the two bolts (1), and then remove the eye guard assembly (2).
2. Turn the pulley in the direction of the arrow to move the needle bar to the lowest position. Then remove the rubber cap (4),
loosen the screw (5) and then move the needle bar up or down to adjust so that the second reference line from the bottom
of the needle bar (reference line A) is aligned with the lower edge of the needle bar bush (3).
* If using a DP x 5 needle, use the highest reference line (reference line a).
2326B
3898B
3899B
Reference line
Increase Decrease
3900B