Adjusting The Zigzag Base Line Position - Brother RH-9820 Service Manual

7. ADJUSTMENTS

7-3. Adjusting the zigzag base line position

Preparing a short customized needle
Prepare a short needle as described below in order to make very small holes in a piece of paper while checking the needle drop
position.
middle
middle
Sharpen tip
Hole width approx. 0.5 mm
0564B
143
1. Use a grinder or similar to grind the tip of the
currently-used needle until the length of the needle is 15
mm.
2. Sharpen the tip of the needle.
NOTE:
Sharpen the needle so that the tip of the needle is in the
middle.
0563B
3. Place a piece of paper (1) underneath the work clamps.
4. Turn the upper shaft pulley (2) to set the needle to its
lowest position.
5. Move the needle up or down to adjust the installation
position of the needle so that the tip of the needle makes a
hole with a width of about 0.5 mm in the paper (1) when
the needle comes to the needle down position.
RH-9820