Brother RH-9820, Service Manual, Page: 167 / 236

7. ADJUSTMENTS
RH-9820
158
7-16-2. Making fine adjustments to the knife position
Adjust the knife position so that it cuts the material cleanly at the inside sewing position and around the eyelet.
* Before carrying out this adjustment, check that the procedure in “7-3. Adjusting the zigzag base line position” has been
completed correctly.
* The knife position can be adjusted independently in the forward/back direction and tilt direction.
<Adjustment procedure>
1. Install the short customized needle (1).
(Refer to “7-3. Resetting the data (initialization)” in the
instruction manual for details on the short customized
needle (1).)
2. Set the air pressure at the hammer pressure adjustment
regulator on the underside of the table to about 0.2 MPa.
(Refer to “7-17. Adjusting the cutting pressure”.)
* This is so that the knife will not make several
overlapping incisions in the hammer and so that the
paper for checking the needle drop does not become
pierced while adjusting the knife position.
3. Press the AFTER key (2) on the operation panel to set the
cutting method to “cutting after sewing”.
4. Place a piece of paper (3) underneath the work clamps.
5. Start the sewing machine and trace the needle drop
position around the eyelet hole.
6. Check that the needle drop positions around the eyelet
hole and the knife cutting position overlap uniformly.
* Checking will be easier if the cutting position value (A)
in the parameter settings is set to “0”. (Refer to “5-3-1.
Parameter list” in the instruction manual.)
7. If they do not overlap uniformly, turn off the power and
carry out the adjustment in steps 8 - 13.
* Once adjustment is complete, repeat steps 4 - 6 to
check, and if further adjustment is needed, repeat step
7.
(Continued on next page)
0417B
0397B
0431B
0555B
15mm