R5090
Fis.20
/. Hold the bolonce wheel in this position ond turn lhe hook on its shoft
until its point is opposite the center line of rhe needle.
Slightly tighten
whicheveÍhook sel screwcon be reochedmosl eosily.
L Check whether the hook point is obout 3ir." (1.2 mm) obove ihe rop
of the needleeye. If odiusimentis required,
loosenset screwc (Fig,l9)
ond setfhe needle
bor ot ihe correctheight.
9. Checkwhether lhere is o cleoronceof .004"(0.1
point ond lhe needle.Moke sure thot the hook mm) belween lhe hook
point will never choíe
ogoinstlhe needle.
10.Tighleo boih hook sel scíews
pres5er
Íoot. sêcurely
ond reploce needle plole ond
To focilitote setting the needle bor ot the coírect height, o smoll depres-
sion obout t/e." wide hos been milled into the bor. When the needle bor
hos reochedthe lowest point of its siroke,the top of this mork shoulo oe
Ílush with the boitom edge of the lower needle bor bushing.The width of
lhis mork coincides with ihe omount of needle rise reouired lo Íorm
the loop. In other words, when the needle bor hos risen obout 5/r." Írom
the lowesl point of its ltrole, the hook point shouldbe oppositelhe centeí
line of the needle.
This lost odjustment
pÍocedure,
however,is not prêcise
enough.
