Feed Adjustment (Gear Backlash) - Brother PE-300S Service Manual

17. FEED ADJUESTMENT (GEAR BACKLASH)
STANDARD
When test mode (6) initial feed position is selected, clearance between FPM gear and rubber stop of initial plate
should be 1.0-2.0mm.
F gear and FPM gear should be set so that F gear moves freely with no clearance.
ADJUSTMENT
1. Remove both screws from set plate C. Remove NP (needle position) board assembly.
2. Loosen both screws on feed pulse motor (FPM) by turning them about one half rotation (180 degree).
3. Line up indicator marks on F and FPM gears. Set gears.
4. Turn initial plate. Adjust and set F and FPM gears so that they rotate freely with no clearance.
* Move F gear forwards and backwards. While checking movement, gradually move FPM gear.
5. Fasten both FPM screws.
6. Fasten both screws on set plate C (of NP board).
7. Select test mode (6) initial feed position, move feed dog back to set them in their initial position.
8. Make sure that clearance between surface of FPM gear and rubber stop of initial plate is within 1.0-2.0mm.
9. While set in test mode (5) feed dog position, repeatedly depress
moves freely.
Adjustment Points
(1) If F gear and FPM gear are not set properly, feed may be off.
(2) If F gear and FPM gear are set too tight (so that gears come too tightly together), it could result in pulse
motor and inability to feed fabric.
(3) If setting of F gear and FPM gear is too weak (too much backlash), abnormal sounds may result,
interfering with proper feed and stitching.
1
6
6
5
2
1
Feed dog initial position
F gear
5
Line up indicator marks
3
4
4 Initial plate
- 43 -
and marks and check that F gear
Feed dog position screen
8
Rubber stop
1-2mm
clearance