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Adjustment Procedure
① Assembly
1. Remove the face plate, and insert the 3mm feeler between the presser bar position bracket ❶ and
lifting plate ❷.
2. S
ecurely tighten three presser motor asm. setscrews while bringing cam roller ⓮ and cam into light
contact with each other.
3. Remove the AK cover 8A, loosen the setscrew ❸ on the sensor mounting plate, and tighten the
setscrew ❸ in the center of the slot in the sensor mounting plate ❹.
②
Assembly and adjustment
1. Turn on the power and step on the pedal to the 1st step, and the presser foot is lifted (to the origin
height). Make sure that the origin height is 8.5 mm in height. The origin height is the distance between
the top face of the throat plate and the lower face of the presser foot.
2. If the distance is largely deviated, turn off the power, loosen the setscrew
❸
. on the sensor mounting
plate, and adjust the position of the sensor mounting plate
❹
.
• To increase the presser rising amount, move it to the A side.
• To decrease the presser rising amount, move it to the B side.
3. Tighten the setscrew
❸
on the sensor mounting plate.
4. Turn on the power again, and depress the back part of the pedal to the 1st step to lift the presser foot.
5. Make sure that the origin height is 8.5 mm in height. If the height is not 8.5 mm, repeat the steps 2 and 3.
(Caution) In some cases, an error occurs during origin search or regular operation after
assembling according to the steps in "
②
Assembly and adjustment". In such a case,
the angle between the cam
and presser motor shaft may be inappropriate.
Adjust the angle between the cam
and presser motor shaft so that the engraved line
A
of the cam
goes in the vicinity of the lowest point (not necessary to be the lowest
point) at returning to the origin, and conduct the procedure from the step 1.
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