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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

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.

SunStar SWF Series User Manual

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