7-1
7-1) ADJUSTING THE TRIMMERS
7-1-1) Adjusting the Position of the Trimming Cam (Insert Angle of Movable Blade)
MACHINE ADJUSTMENTS
CHAPTER
7
The movable blade is started by the trimmer cam in the angle it is inserted. As one of the basic trimming
functions, it arranges the upper thread tails in the needle after trimming.
1) Adjusting the position of the movable blade
①
Check if the movable blade is in the correct
position.
②
Tip of the movable blade should be around 1mm
from the center of the fixed blade. Incorrect
position of the movable blade can cause
trimming errors or deviation of the upper thread.
③
Unfasten the crank screw to adjust the location
of the movable blade (see [Fig.7-1]). Fasten the
screws back.
2) Adjusting the angle of the movable blade
①
Unfasten the screws on the blade cam directly
connected to the lower shaft. Turn the lever to
adjust the main shaft rotary angle at 295
°
.
②
Press the trimming solenoid and insert the
trimming cam roller into the trimming cam
([Fig.7-2]). Turn the cam and when the roller
aligns with the curve of the cam, fasten the cam
screws back.
③
Run the manual handle and check if the
movable blade is well-inserted at 292
°
. Always
check after the adjustment.
[Fig.7-2]
[Fig.7-1]
WARNING
Turn OFF the main power when adjusting the machine.
Fixed blade screw
Fixed blade
1
Blade cam screws
Direction
of cam
movement
Trimming
solenoid
Lower shaft
Blade
cam
Roller
Roller
Movable blade
