Brother RH-9820 Service Manual page 153

Adjusting the zigzag base line position
The zigzag base line is on the inside of the zigzag.
If you change the zigzag width, only the outer needle drop position will change, and the zigzag base line (inner base line) will not
change.
0329B
1. Move the needle bar gear block (θ) to the home position.
* The home position for the needle bar gear block (θ) is
when the bed index mark (1) and the looper base index
mark (2) are aligned.
2. Install the
(Refer to "Preparing a short customized needle" on the
previous page.)
0562B
3. Move the feed base (4) forward (to near the sewing start
0431B
position) by hand.
4. Place a piece of paper (5) underneath the work clamps.
* Secure the piece of paper so that it will not move.
5. Turn the upper shaft pulley (6) to lower the needle so that it
makes a small hole in the paper (5).
6. Turn the upper shaft pulley (6) in reverse to return the
needle to its original position (needle up position).
7. Turn the needle bar gear block (needle bar) (7) by hand
180 degrees.
8. Turn the upper shaft pulley (6) to lower the needle so that it
makes a small hole in the paper (5).
* If the inner needle drop positions (A) are not aligned,
carry out the adjustments in steps 9 - 12 on the next
page.
0475B
RH-9820
7. ADJUSTMENTS
short customized
(Continued on next page)
needle (3).
144