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Adjustment
[Standard]
The spring should be hooked on the groove which the spring was hooked on at release.
* Normally on the second groove from the bottom
The clearance between the motor tension pulley holder and the emboss of tension pulley
holder should be 0.5 ±0.2 mm (0.3 to 0.7 mm).
[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. Check the location of the groove with spring hooked on.
4. Loosen the two screws of the tension pulley holder B assy.
5. Move the motor tension pulley assy up and down to adjust the clearance between the motor tension pulley
assy and the emboss of tension pulley holder B assy.
6. Tighten the two screws of the tension pulley holder B assy to secure the tension pulley holder B assy to the
arm bed.
Screws
Motor belt tension
Motor tension pulley assy
Screws
Tension pulley holder B assy
Motor belt
3 - 4
Spring
0.5 ±0.2 mm
(0.3 - 0.7 mm)
Emboss
Screw, Pan (S/P washer) M4X12
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