1
1) Install the control box to the table with the tting
bolt (asm.) supplied with the unit as accessories.
At this time, insert the nut and washer supplied
with the unit as accessories as shown in the
gure so that the control box is securely xed.
2) Set the machine head to the table after installing
the control box (or with small-sized motor) to the
table. (Refer to Instruction Manual for the sewing
machine.)
(2) Installing to the table
1) Adjust the belt tension by turning upper and
lower nuts
1
of the adjustment bolt and adjust
the height of the center of the motor so that the
belt sags 15 mm (9.8N) when the center of the
belt is pressed by hand.
(3) Adjusting the belt (when M-91 is used)
Plain
washer
Spring
washer
Hexagonal nat
When the belt tension is excessively low,
medium or low speed rotation becomes
uneven, or stop accuracy is deteriorated.
When the tension is excessively high,
deterioration of the motor is advanced.
So, be careful.
Approx. 15mm / 9.8N
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