Pfaff 234 User manual

R5315
PFAFF234
High-Speed
Sewing
Machine
INSTRUCTION
BOOK
i-n
I

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.

InslruclionsÍor Mechanics
17,
TheV-Beh
Drive
When mounling the V.beli for the first time, core should be token thof il
rs nol forced on the motoí pulleybecouse
o crookedlymouniedbelt weors
out ouicklv.
Íhe vorious moto.s used lo drive ihe PioÍ.23.i cre siondord molors con.
lorming to Germon DIN 42ó91
speciíico'ons.ïhey ore pivotolly connected
wilh lhe motor brockei by meonsoÍ c h n_qe
s:ud ond. oíier loosening
o
sel screw
or nul, con be swungto ony des ea cos
i on to focilitotemounr.
ing lhe bell on lhe mochine ond moto- c- ers See io:or picr.rrec n
Fio.I7l
Fig l7
Thetension
muslnoi be set ioo tight os thrs
would couseexcessrvepressure
on lhe orm shoft beorings
ond might resultin overheotingond seizing
oÍ
lhe mochine.
The bell is lens
oned corrccllyií you con cornpfess
il obout i! oÍ on inch
midwoy belweenboth pulleys.
Tightenthe h nge siud nul (or set screwk on moiors Fig. l7) securely
so lhol il will no; loosen while sewing.
18

Fig.6
R4345
8. Choosingthe Proper
Needle
The Píoff 234usesthe Íollowing round-shonk,
round-poinineedles:
Model A System134nêedtes
Model B - Systeml3J needtes
Model C Sysïêm 134
needles
Necdle ond lhreod Chort
Needle
Size Corlon sitk Synthetic Lrnen
6l
:l
BO
90
't00
0
140
3
120r3
100/3
80/3
70/3
60/3
70t3
60/3
50/3
t303
130i,1
r
00.,3
100,I
80/3
80'4
70/3
-ó0i3
70t4-ó0,'4
50t3
- 40/3
5A/4
- 40/4
3Cr/3
30/4
30ió
200i
3 I50/3
140'3- r
2c
3
I20/3- 100
3
r00/3- 80,'3
70/3
ó0l3

Oil seolerscrew
2 (Fig. l) on the top covoíhostwo oilwicks
qttoched
fo
it whió providê
for on odditionol
lubricotion
of the feed eccentric
ono,
therefore,
shouldbe sooked
with oil thoroughly.
Both
theverticol
shofrrop
beoring
ond the upperbevel georossembly
conb6 oiledqÍtertqking
out
cop screw
3 (Fig, 1).Theneedle
bor is lubricotedby meons
oÍ on oilwick
which
leods
downÍrom the tqke-upguordond is jookedwith sproyoil.
Formlhe.
hobii oÍ pufting
o drop oÍ oil into the hook rocewoy
severol
lrmes
o cloy.
Cerloin.sewing
.lroubles,
suchos lhreod breoking
ond stitó skipping,
connolbe remediedby opplyingexcessive
quonlities
of oil. Excessoil qno
linttend
lo formo pocked
moss
which,in time,
will couse
hordrunning
oÍ
ihe moóineond soiling
of thework.
Mokr it o rulc, thereÍore,
to qpply oil rporinglybut regulorly.
AlwoysusePfofÍ
sewingmochine
oil No.28GllmI22 whió is completely
non-resinous.
Although
thebevelgeors
ore
enclosed
incoses
ondrequire
nospeciol
moin-
lenonce,il is recommended
to replocetheold greose
by Pfoff
greose
No.
2&-l-12O
213once
o yeor.
Owingfo the speciol
Ébricoting
propeities
of this
greose,
theflonks
of thebevel
geor
teeih
shouldbegreoled
onlylightly.
From
lime to iime,unscrewthe needle
ploteond remove
lhe lint which
hos
occumuloted
on theÍeeddog ond in theviciniryoÍ the sewinghook.
Thisir veryimpo.tont
becousethislintcontoinssmoilporticles
of dressing
which
couse
excessiveweorof the sewingmeóonism.
On moclrines
which
oÍe in opeÍolionconstontly,
thelini musl
be removed
everydoy.
5, lemoving the Bobbin Cose
Roisethetoke-up
leverto its
highest
position
ond
openthebedslide.Reocn
underlhe toblewiih your left hondond openthe bobbin
cole loíchwith
thenoilof yourthumb.Pull
outthebobbin
cose
by holdingrhelotchwith
thumb
ondÍoreÍinger,
osshownin Fig.4.While
you holdthebobbin
cose
by its
openlotch,thebobbinconnotfoll out.
6. Winding
rheBobbin
Bobbins
ore woundwilh lhe power-driven
bobbin
winder(Fig.5),which
requires
no lub.icotion
sinceitsspindleruns
in q sinleredsteel
bushing.
A bofÍle
plote
mounled
on the
winder
bose
prevents
thelhreodfromberng
pulled
lowordthedriving
beltby ihe droÍt of oi. cqusedby the belr.Thé
V-groovein therim
of lhewinderpulley
hosonobtuse-ongled profile
which
permih
lhe use
of bothroundond V-belts.