O
Installation position of the
thread trimmer cam
( 1 ) Adjust so that the gap between the lower
shaft bushing (middle) and the bushing is
6 mm and then tighten the screw Ⓐ to the
flat on the lower shaft.
( 2 ) Place the thread trimmer cam on the end
face of the bushing and the thread tension
releasing cam on the end face of the thread
trimmer cam (making the gap between each
part zero), then tighten each screw.
P
Adjustment of the thread trimmer cam
( 1 ) Turn the pulley and stop it at the position where the needle comes to the lowest.
( 2 ) Put the cam roller into the thread trimmer cam groove by pushing the cam follower crank.
( 3 ) Turning the pulley, adjust the thread trimmer cam so that the movable knife starts moving when
the green mark point on the pulley comes in line with the black mark point on the arm.
To adjust, loosen two thread trimmer cam clamp screws Ⓐ.
Arm
Green mark point
Pulley
Black mark point
Screw Ⓐ
Cam roller
Cam follower crank
Thread trimmer cam
Cam groove
Reverse block
Lower shaft bushing (middle)
Screw Ⓐ
Bushing
Thread tension releasing cam
Thread trimmer cam
Feed connecting rod
6 mm
Set screw
HOW TO USE
— 18 —
Summary of Contents for LT2-2250-B1T
Page 28: ...Printed in Japan ...
