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Adjustment Procedure
4) Adjusting the knife unit
Adjustment of the knife unit
[2]
1. Check to make sure that the power switch is in the OFF state.
Remove the gauge (presser foot, throat plate and feed dog) from
around the needle.
2. Tilt the sewing machine head.
3. Loosen loop spreading knife eccentric pin setscrews ❸ (two piec-
es). Turn loop spreading knife eccentric pin ❻ with a flat-blade
screwdriver to finely adjust the rotational-direction position of loop
spreading knife ❹.
4. After the adjustment, tighten loop spreading knife eccentric pin
setscrews ❸ (two pieces).
5) Adjustment of thread trimming speed
The thread trimming speed has been adjusted to 210 sti/min and
the second thread trimming speed has been adjusted to 180 sti/min
at the time of shipment.
Depending on the type of thread to be used, the thread trimming
speed should be increased. On the other hand, in the case of using
fragile thread (such as a high-count filament type thread or cotton
thread), the thread trimming speed should be decreased to reduce
damage to the thread.
To adjust the thread trimming speed, set the both P49 and P50 to
lower values.
[How to adjust]
1. Hold down
❾ for 3 seconds.
2. Press
❶ to select "P49" and press
activate the setting section.
3. Press
❶ to set the thread trimming speed.
4. Press
to determine the setting.
Results of Improper Adjustment
○ Adjust the position of the marker
dot A on the loop spreading knife
eccentric pin ❻ only in a direction
where it faces the operator's side.
❷ to
– 52 –
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