Adjusting The Cutting Pressure - Brother RH-9820 Instruction Manual

NOTE: Relationship between needle drop position and eyelet pattern at the eyelet
Eyelet pattern a x b
Needle drop c x d
Cutting before sewing

9-17. Adjusting the cutting pressure

0559B
Cutting after sewing
0469B
RH-9820
When switching between cutting before sewing and cutting
after sewing, the needle drop position at the inside sewing
position will change automatically in accordance with the
eyelet pattern as shown in the illustration.
Eyelet pattern
a x b
Knife
No.
1 2.1 x 3.2
2 2.8 x 4.3
3 3.0 x 4.6
4 3.2 x 5.4
5 Straight
6 3.8 x 4.3
* The default setting for the needle drop position for no
cutting is the same as for cutting before sewing. You can
also change the needle drop position setting to the same
position as for cutting after sewing by changing parameter
settings. (Refer to No. 33 in "5-3-1. Parameter list".)
Set the cutting pressure to the minimum pressure that still
allows the material to be cut.
* Set to between 0.1 - 0.6 MPa. (It is set to 0.4 MPa at the
time of shipment from the factory.)
<Adjustment method>
Turn the knob (1) of the hammer pressure adjustment
regulator on the underside of the table to adjust the air
pressure.
NOTE:
Do not increase the cutting pressure more than necessary.
If the pressure is too high, it will wear out the hammer and
damage the knife.
If the material cannot be cut cleanly, do not increase the
cutting pressure to too high a pressure.
Check the timing between the knife and the hammer.
(Refer to "9-13-2. Adjusting the contact between the knife
and the hammer".)
9. STANDARD ADJUSTMENTS
Needle drop c x d
Cutting before Cutting after
sewing sewing
1.7 x 2.7 2.5 x 3.8
2.4 x 3.9 3.2 x 4.9
2.6 x 4.1 3.4 x 5.2
2.8 x 4.9 3.6 x 6.0
Straight Straight
3.4 x 3.8 4.2 x 4.9
90