Y Belt Tension - Brother PR655 Service Manual

Adjustment
[Standard]
The belt slack should be 3.9 mm when pushing the center of the Y belt with a force of 2.4 to 2.5N (245 to 255g).
[Adjustment]
1. Move the XY carriage to the innermost position.
2. Loosen the screw 1 of the Y pulley R on the Y driving assy.
3. Loosen the 2 screws 2 of the Y tension plate assy.
4. Move the Y tension plate assy back and forth to adjust the Y belt tension of the right side.
5. Tighten the 2 screws 2 of the Y tension plate assy to secure the Y tension plate assy.
6. Repeat the same steps to adjust the Y belt tension on the other side.
7. Tighten the screw 1 of the Y pulley R on the Y driving assy to secure the Y pulley R.
1
2
XC2277001
1
Y pulley R
Push-pull gauge
3.9 mm
Y belt (right)

Y belt tension

Set Screw, Socket (CP)
M3X3
Screw, Pan (S/P washer)
M4X10
Push-pull gauge (5N)
with hex wrench 2 mm
2.4 - 2.5N (245 - 255g)
2
4 - 30
134mm
Center
134mm
Y tension plate assy