JUKI DU-140, Instruction Manual

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20. TROUBLES AND CORRECTIVE MEASURES
1) Use the 3-phase 400 W AC clutch motor.
2) Use an M type V belt.
3) The following table shows the relationship among the motor pulley and the sewing speed.
Model Sewing speed
Effective diameter of
handwheel
Number
of poles
Frequency
Rotational speed
of motor
Effective diameter
of motor pulley
DU-140 2,000 sti/min
φ
76.0 4
50 Hz 1,430 rpm
φ
105
60 Hz 1,715 rpm
φ
90
(Caution) The effective diameter of the motor pulley is obtained by subtracting 5 mm from the outside diameter.
19. MOTOR PULLEY AND SEWING SPEED