To Adjust The Timing Of The Needle And The Feed Dog - Janome 990D Service Manual

990D

TO ADJUST THE TIMING OF THE NEEDLE AND THE FEED DOG

Correct Setting:
When the tip of right needle is at 2 ~ 4 mm above the needle plate in its downward motion,
and lowered presserr foot, the top of the feed dog teeth should be level to the top surface of needle
plate at their rearmost position.
Before adjustment, check if needle bar height and feed dog height are correct.
To adjust:
1. Loosen setscrew A and remove setscrew B, remove feed base cover.
2. Set the stitch length dial at "3" and differentiial feed dial at "1.0".
3. Raise the presser foot and move the tip of right needle at 2 ~ 4 mm above the needle plate in its
downward motion by turning the handwheel.
4 Lower the presser foot, and loose two setscrews C for main feed cam, two setscrews D
for sub feed cam, annd adjust the position of the subb feed cam and tighten setscrews D.
* Turn the sub feed cam to the direction E if the feed dog is lower than the surface of the
needle plate.
* Turn the sub feed cam to the direction F if the feed dog is higher than the surface of the needle
plate.
5. Set the main feed cam to keep the clearance between the bushing and main feed cam to about
1 mm, and tighten two setscrewsss C.
Attach the feed base cover with setscrews A and B.
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