Service manual

S-4000 TKF, LS Omron
1-43
Released 12/2009
e-mail: [e-mail]; [e-mail]; website: www.amfreece.com
Phone: [phone] (Service), [phone] (Spare Parts); Fax: [phone]
E - MACHINE ADJUSTMENTS
16. THREAD TRIMMING
The trimming mechanism ensures the correct thread trimming after sewing the
last stitch. The trimming hook moves in the direction of the arrow, both thread
loop legs A and B are pulled forward. When the thread hook approaches the
end of the stroke, leg A contact the trimming knife, cutting the thread.
1. Trimming cylinder adjustment
a) tilt the machine head onto the rest pin and close the air supply.
Extend the piston ➊ of the cylinder ➋ to the maximum position.
b) check to be certain that the cylinder does not push the lever ➌ too
high and into contact with the bedplate casting ➍. If no clearance
exists, adjust as described in c, d, and e below:
c) loosen the screw ➏
d) to obtain the correct position of the lever ➌, loosen the nut ➎
and turn the cylinder piston ➊ in or out as needed
e) tighten the nut ➎ and the screw ➏. After this adjustment check if
no axial clearance exists on the shaft ➐.
f) if the axial clearance exists on the shaft, loosen the screw ➏,
move the shaft ➐ to the left so that the locking ring ➑ touches
the recess in the plate ➌. Move the lever to the right and tighten the
screw ➏.
2. The trimming hook adjustment
a) push the piston ➊ of the trimming cylinder ➋ to the maximum
position and loosen the screw ➒ of the trimming actuator ➓.
b) turn the trimming actuator ➓ and set the clearance 1.0 mm
between the throat plate and the point of the trimming hook.
c) tighten the screw ➒ of the trimming actuator ➓.
d) open the air supply and check by switching the valve of the
trimming cylinder if the actuator ➓ does not hit the bedplate casting.