7-2
7-1-2) Adjusting Space between Movable Blade and Hook
To adjust a space between the movable blade and the hook, remove or insert a spacer (t 0.1) between the blade
base and the hook base. In the case of spacer removal, make sure to check if the hook does not interfere with the
movable blade.
[Fig.7-3]
Blade base
Movable blade
Fixed blade
Spacer
Hook base
Hook holder
7-1-3) Adjusting Blade Tension
Make sure to check and adjust the cross-tension of the movable and the fixed blades after replacement or repair.
①
Checking the cross tension
Manually move the movable blade and cut the
upper and the lower threads. Check the cross-
section of the thread cut.
②
Adjusting the cross tension
Adjust the cross tension using fixed blade
tension control screws (see [Fig.7-4]).
Manually move the movable blade and adjust
that it crosses in parallel with the cutting line
of the fixed blade from its entry point to its
return point.
Crank
screw
Movable
blade crank
Movable
blade
Movable blade
Fixed blade
Fixed blade
Tension
adjusting
screw
L-wrench
[Fig.7-4]
[NOTE]
Avoid excess cross-tension. It may cause the movable blade to wear out from overload at its entry or return point.
