21
0.3 mm
cam followEr
cam followEr rElEaSing arm
SEtScrEw
convEx part
zigzag cam
pattErn SElEct cam
poSition (a)
poSition (B)
(c)
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 " ". (5th cam aS viEwEd
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.
Summary of Contents for NH15
Page 1: ...1 SERVICE MANUAL MODEL NH15 PARTS LIST...
Page 23: ...23 WIRING 1 WIRING FOR MACHINE SOCKET UNIT L M M MOTOR L LAMP M L 120V 240V...
Page 34: ...34 MODEL NH15 PARTS LIST 1 2 3 4 4 5 6 7 8 9 10 11 12 13 14 8 4 15 16 17 8 8 18 19...
Page 38: ...38 MODEL NH15 PARTS LIST 1 2 3 9 5 8 6 7 4...
Page 40: ...40 MODEL NH15 PARTS LIST 2 8 1 4 5 7 6 3 9 10 11...
