Disengagement Of Cam Follower - Janome NH15 Service Manual & Parts List

MECHANICAL ADJUSTMENT

DISENGAGEMENT OF CAM FOLLOWER

TO CHECk:
too narrow clEarancE BEtwEEn thE cam followEr and thE top convEx of
zigzag cam maY oftEn cauSE difficultY in turning of thE pattErn SElEctor
dial, thiS can alSo cauSE unintEndEd pattErnS to BEcomE SElEctEd or makE
zigzag Stitch in Straight Stitch SEtting.
ADJUSTMENT PROCEDURE:
1. rEmovE thE front covEr (SEE pagE 6).
2. mount thE pattErn SElEctor dial, and SEt it at pattErn "
from (c))
3. turn thE handwhEEl to put thE cam followEr onto thE top convEx of thE zigzag
cam.
4. looSEn thE SEtScrEw.
5. puSh thE convEx part of thE cam followEr rElEaSing arm in thE dirEction of
arrow until thE cam followEr rElEaSing arm touchES to poSition (a) of thE
pattErn SElEct cam, and thEn, tightEn thE SEtScrEw.
NOTE:
aftEr thiS adjuStmEnt, chEck that thE clEarancE BEtwEEn thE zigzag
cam and thE cam followEr iS 0.3mm whEn thE cam followEr rElEaSing
arm haS rEmovEd to poSition (B) BY turning thE pattErn SElEctor dial
countErclockwiSE, and alSo thE clEarancE BEtwEEn thE cam followEr and
thE zigzag cam Should BE 0.3mm.
6. rEmovE thE pattErn SElEctor dial, and mount thE front covEr.
zigzag cam
poSition (B)
cam followEr
(c)
pattErn SElEct cam
poSition (a)
0.3 mm
cam followEr rElEaSing arm
convEx part
21
". (5th cam aS viEwEd
SEtScrEw