KANSAI SPECIAL JJ Series, Parts List, Instructions

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UPPER & LOWER KNIFE ADJUSTMENT
11-1 Upper and lower knife
■
Upper knife height
Upper knife height should be 0.5~1.0mm lower from the top surface of the needle plate
when the upper knife is at the bottom of its travel.
Adjust by loosen screw B.
■
Lower knife height
Set the edge of the lower knife E is at the same level of needle plate top surface.
Adjust by loosen screw D.
■
Sewing width adjustment
1.
Loosen screw F and move lower knife holder to the extreme left position. Then
tighten screw F temporarily.
2. After loosening the screw H, adjust the sewing width by moving the upper knife
holder to the desired position. Do not forget to re-tighten the screw H securely after
adjustment is made.
3. Move the upper knife point K to the top surface of needle plate by turn the
handwheel.
Loosen the screw F, Lower knife E is cross with upper knife C by a spring.
After all tighten screw F securely.
11-2 Lower knife sharpening
The upper knife is made of super hard compound
metals. When the knife gets blunt and cannot cut
clean, it needs to be sharpened like the illustration
on the right.
When sharpening doesn’t work anymore, replace the
knife with a genuine Kansai Special’s upper knife.
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NEEDLE GUARD ADJUSTMENT
■
Needle guard (rear)
When the point of lower looper is aligned with the center of the needle. The needle should
be deflected forward by needle guard (rear) A so that there will be 0~0.05mm clearance
between the point of the lower looper and center of the needle.
Adjust by screw B.
■
Needle guard (front)
Obtain 0.1~0.2mm of clearance between the needle and needle guard (front) A when the
needle is at the bottom of its stroke.
Adjust by screw B.