10. STANDARD ADJUSTMENTS
37
KE-434C,435C
10-3. Adjusting the driver needle guard
Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw (2) and turn
the eccentric shaft (3) to adjust so that the driver needle guard (1) contacts the needle.
If the needle contact pressure is too great, skipped stitches may occur. On the other hand, if the driver needle guard (1) is not
touching the needle, the tip of the inner rotary hook will obstruct the needle, resulting in an excessively high amount of friction.
10-4. Adjusting the needle clearance
Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw (1) and turn
the eccentric shaft (2) to adjust so that the clearance between the needle and the rotary hook is 0.01 - 0.08 mm.
10-5. Adjusting the shuttle race thread guide
Install the shuttle race thread guide (1) by pushing it in the direction of the arrow so that the needle groove is aligned with the
center of the needle plate hole.
Note:
If the shuttle race thread guide is in the wrong position, thread breakages, soiled thread or catching of the thread may
occur.
The position of the shuttle race thread guide is adjusted at the time of shipment from the factory. It should not be changed
if at all possible.
0135Q
Needle center line
Tip
2555Q
2556Q
0138Q
2557Q
0.01 - 0.08mm
2558Q
