HIGHLEAD GC20528-BDZA Instruction Manual - Page 11

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21.RELATIONSHIP BETWEEN HOOK MOTION AND OPENER MOTION

（1）Turn the balance wheel by hand and stop when

the opener holder is located most remotely from the

throat plate.

（2）Make sure the gap between the bobbin case

holder A and the opener is approximately 0.2mm.

（3）If the gap is too large or small,loosen the

opener holder set screw B and adjust position of the

opener.

22.RELATIONSHIP BETWEEN NEEDLE MOTION AND FEED DOG

MOTION

（1）Set feed length to "0"on the feed setting dial.

（2）Lean the machine head backward.

（3）Loosen the feed lifting rock shaft crank set screw

A and B.

（4）Set the needle at the lowest position.

（5）Adjust the distance between presser rod and

vibration prevention rod to 13.5mm and temporarily tighten

the feed lifting rock shaft crank set screws A and B.

（6）If the connection is not at right angle,remove the back cover,loosen screw C and move the right link to

adjust.

（7）After the completion of adjustment,fully tighten the screw A,B,C.

Note:At the same time make certain that needle can enter the feed dog needle hole at the center of

the hole.

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