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Adjustment
[Standard]
The belt slack should be 3 to 5 mm when pushing the center of the timing belt between the
upper shaft pulley and the timing pulley D with a force of 1.96 N (200 gf).
[Adjustment]
1. Turn off the power, and then remove the foot controller.
2. Remove the face plate assy, the pattern selecting dial and the feed dial, and remove the
front cover assy and the rear cover assy.
3. Loosen the screw of the tension pulley assy.
4. Move the tension pulley assy back and forth to adjust the tension of the timing belt.
5. Tighten the screw of the tension pulley assy to secure the tension pulley assy to the arm bed.
XC2277001
Screw, Pan (S/P washer) M4X12
Screw
Tension pulley assy
3 - 5 mm
Timing belt
Timing belt tension
Push-pull gauge (5N)
3 - 3
Push-pull gauge
Timing belt tension
1.96 N (200 gf)
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