Adjusting The Needle Bar Height - Brother LZ2-B850 Service Manual

5-8. Adjusting the needle bar height

1050S
For zigzag width 8mm
B850W, B851
u
r
t
1051S
For zigzag width 5mm
B850-1
0601M
w
y
q
e
w
0602M
LZ2-B850,B851
When the needle bar q is at its lowest position, the dis-
tance from the top of the auxiliary needle plate w to the
bottom edge of the needle bar q should be the same as
the height of accessory timing gauge 1 e.
1. Remove the presser foot r, needle plate t, auxiliary
needle plate w and feed dog y .
2. Place the auxiliary needle plate w on the needle plate
installation surface of the machine bed.
3. Turn the machine pulley to move the needle bar q to
its lowest position.
4. Loosen the screw u.
5. Move the needle bar q up or down to adjust the dis-
tance from the top of the auxiliary needle plate w to
the bottom edge of the needle bar q so that it is the
same as the height of accessory timing gauge 1 e.
Note:
The needle plate t and the auxiliary needle plate w
are of different thicknesses, so be sure to use the aux-
iliary needle plate w.
6. Securely tighten the screw u.
7. Install the presser foot r, needle plate t, auxiliary
needle plate w and feed dog y .
* When adjusting the needle bar height, be sure to ad-
just "5-15. Adjusting the needle and rotary hook tim-
ing" also. (Refer to page 5-12.)
* When remove the feed dog. be sure to adjust "5-5.
Adjusting the forward/back, right/left position of the
feed dog". (Refer to page 5-03.)
5. ADJUSTMENTS
5-06