Knife Adjustment - SunStar KM-250 Series User Manual

21) Knife Adjustment (KM-506-7/KM-530-7 Series)
(1) Adjusting the height of the knife
A. The knife is operated by the lever
and sewing of the material can be done simultaneously. If the lever
B. Loosen the knife fixing screw
above the top face of the needle plate . Then, tighten the knife fixing screw .
(2) Adjusting the front-back position of the knife
A. Set the stitch length adjusting dial to 0.
It is a standard that the edge of the blade
To adjust the front-back position of the knife, loosen the knife plate fixing screw
The adjustable width range of the knife edge is from 2mm forward to 3mm backward from the needle center.
(3) Adjusting the left-right position of the knife
A. To adjust the left-right position of the knife , loosen the knife frame fixing screw
B. After loosening the knife frame fixing screw
plate , tighten the fixing screw .
C. If the knife is too close to the needle plate , there may be an overload on the knife when in operation; on the other
hand, if the adhesion is too weak, there may be problems when cutting the material. Therefore, the lever
always be operated after adjustment to check whether the knife
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at the center of the sewing machine. If the lever
when the lever is pulled down and adjust so that Area A of knife
meets the center of the needle
and adjusting the knife side so that it would touch the side of the needle
Keystone Sewing Machine Company, Inc.
Area A
is pulled down, the cutting
is pulled up, sewing is done without cutting.
.
and move the knife plate back and forth.
and move the knife frame
movement is smooth.
[Fig. 48]
is about 0.5mm
[Fig. 49]
sideways.
must