Pfaff 469 User manual

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PFAFF
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Instruction Book
From the library of: Superior Sewing Machine & Supply LLC

(PFAFP f 469
High-Speed Lockstitch
Differential-Feed Sewing Machine
Instruction Book
G-M PFAFFAG KAISERSLAUTERN BRANCH
From the library of: Superior Sewing Machine & Supply LLC

Foreword
The scope of this book is confined to such instructions as are conditioned by variations in the
design of the Pfaff 469 high-speed differential-feed sewing machine as compared with other
Pfaff high-speed seamers.
An outstanding feature ofthe Pfaff 469 isthe incorporation df sealed-for-life ball and needle
bearings in the machine arm and the needle head. '
Another salient feature is the arrangement of the feed driving and feed lifting eccentrics on the
bottom rather than the arm shaft. The bottom shaft is driven from the arm shaft by a cleated
belt and drives the hook shaft by means of helical gears. These driving elements are enclosed
in an oiltight gear case and are lubricated by an oil-soaked foam plastic sheet. The assemblies
controlling the differential-feed are disposed on two shafts inside and outside the gear case.
The sewing hook is lubricated by means of a gravity lubrication system incorporating a
centrifugal switch.
Since the armshaft is belted to the motor, the machine c^n be tilted back without remoylng
the V-belt.
Additional features of this new high-speed seamer are a novel stitch length control, separate
forward-reverse feed control, built-in bobbin winder and built-in lifting lever. •
Operators will like the modern functional design and the stream-lined belt guard which is
attached to the machine arm.
G. M. PFAFF AG
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R 8766
1. Setting Up the Machine
Like all the other models in the new range of high-speed seamers, the Pfaff 469 differential-
feed sewing machine can only be set up on a power table fitted with the new rubber hinge
bracket and cushion set
The front corners of the bedplate are face-milled on the underside and rest on matching rubber
cushions which are recessed into the tabletop.
At the back, the new-type hinge studs connect the machine with the pins in the two rubber
hinge brackets. This mounting prevents the machine from coming in contact with the tabletop.
The machine is carefully balanced and causes practically no vibration. Whatever vibration
there Is will be absorbed almost completely by the rubber hinge brackets.
2. Mounting the V-Belt
The machine are shipped with the belt guard removed. To mount the V-belt, lift the sewing
head slightly and place the belt on the machine and motor pulleys.
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Both belt guard sections are secured to the arm standard by inserting screw dthrough hole
b3 and spacing sleeve c in the rear section into screwhole d1 in the machine base and
tightening it securely.
Slightly turn out screws a1 and a2 (Fig. 1) and push the two belt guard sections together,
holding them close to the machine so that the above screws enter the appropriate slots in the
back wall of the belt guard.
To tighten the screws, insert the screwdriver through openings b1 and b2 (Fig. 2).
3. Test-Running the Machine
Before you test-run the machine, carefully remove all dirt which may have accumulated in
transit. Be sure to use only a brush and a cleaning rag for this purpose.
The Pfaff 469 must never be rinsed or cleaned with kerosene'because there is a danger that
the cleaning fluid enters the sealed-for-life bearings and dissolves the grease. For the same
reason, kerosene or gasoline must not be used for the regular cleaning of the machine.
Never attempt to eliminate hard working of the machine by squirting oil freely into the bearings
which you believe to be responsible for this fault. If oil enters the sealed-for-life bearings,
the grease will be thinned and flung
out of the bearing, thus rendering permanent lubrication
ineffective. ;
R
9145
Fig. 1 R
9144
Fig. 2
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4. Winding the Bobbin
The new high-speed seamer is fitted with a bobbin winder which is incorporated in the face
cover rather than mounted at the balance-wheel end of the machine, as was customary
previously (Fig. 5). Arranged at a convenient height, it is easy to operate and enables the
operator to wind bobbins quickly and neatly.
The bobbin winder driving motion emanates from the take-up crank. When the bobbin winder
is engaged, driving crank F at the rear end of spindle 17 is pushed into the circular path of
stud K
which engagesthe crankand,inthis way, drives the bobbin winder (Fig. 3).The bobbin
winder spindle is carried in a self-lubricating sintermetal bearing which requires no additional
lubrication.
To engage the bobbin winder, simply depress stop latch a located above the bobbin winder
spindle (Fig. 4). Thisaction causes the spindle to shift slightly to the right in which position
It is retained until a sufficient amount of thread has been wound on the bobbin. The thread
wound on the bobbin pushes the cam up and thereby stops the bobbin winder. The amount
ofthreadto be woundon the bobbin can be regulated by loosening screw b and setting cam
a higher or lower, as may be required. Set the cam higher for more thread, or lower for less
thread.
R 8643
4
Fig. 3
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Fig, 4 shows how to thread the machine for bobbin winding. Place the spool of thread on the
right-hand spool pin of the thread stand. Lead the thread from spool 1a (Fig. 4) up and
through the top thread guide of the thread stand, down and through thread guides 12, 13
and 14, clockwise around thread tension 15 and to bobbin 16.
it is recommended to take the thread after it has been pulled through thread guide 14 and
wind a few turns on the bobbin, then lead it clockwise around thread tension 15 and place
the bobbin on spindle 17.
Depending on the type of thread used, it should be wound on the bobbin tighter or looser.
The thread tension is regulated by turning thumb nut 18 back of the tension discs (Fig. 4).
Turn this nut clockwise for a looser tension, or counter-clockwise for a tighter tension.
if the thread should pile up at one end of the bobbin, adjust the position of the tension stud.
The set screw which secures this stud in position can be reached from below.
Whenever you have removed an empty bobbin from the machine, wind a few turns of thread
on it, place it on the bobbin winder spindle and start the winder.
It is a waste of time to work with a single bobbin or a single spool of thread because this
requires an additional unthreading and threading of the needle, and you cannot sew while
winding the bobbin.
R 9141
Fig. 4
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5. Threading the Needle
Because of the high speed of this machine, it is particularly importantthat the thread passes
to the needle smoothly.
Lead the thread from spool 1 up to the top thread guide of the thread stand and down to
thread guide 2. it is recommended to pass the thread first through the vertical hole from top
to bottom and then through the transverse hole of the guide, as shown in Figs. 5 and 5a,
in order to prevent it from snarling up on the guide and breaking.
Now lead the thread through all three holes of thread retainer 3 (from top to bottom), clockwise
around and between tension discs 4, through thread check spring 5, under slack thread
regulator 6, through thread guide 7. from right to left through the hole In take-up lever 8.
through thread guides 7, 9 and 10, and from left to right through needle eye 11.
R 9148
Fig. 5a
m
Fig. 5
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6. Regulating the Stitch Length
Two separate controls serve to regulate the length of stitch and reverse the direction of feed.
The large diameter of stitch length control St makes for an exceedingly fine stitch length
regulation. When this control is turned by one tooth, the stitch length is increased or decreased •
by Vss". or
0.5 mm. The stitch lengths from 0 to 5/2 stitches per inch are marked on the teeth
of the stitch length control in millimeters (Fig. 6).
In order to avoid that the stitch length setting will be disturbed while sewing, stitch length
control St is secured in position by a locking lever marked Sp in Fig. 6. This lever must be
pushed back slightly when setting the stitch length.
Finger-tip control Tserves to reverse the direction of feed and is operated for backtacking.
When lever T is pressed down, the machine will sew in reverse, making stitches of the length
set. When lever T is released, the direction of feed is instantly reversed by spring action and
the machine will resume forward stitching.
If desired, the machine can be fitted with a second treadle for switching from forward to
backward sewing. ;
••
7. Regulating the Pressure on the Material ?
A powerful flat spring in the machine arm exerts the necessary pressure onthe sewing fqiSt. ;
The amount of pressure is regulated by turning a small set screw which can be reachecf'by,
inserting a screwdriver through hole 19 on the right of the spool pin (Fig. 6a). Tur^ the
screw in for more pressure, or out for less pressure. -
r - ^
Fig. 6 R
9386 Fig. 6a
R 9147
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8. Lifting the Presser Bar
Since the arm standard has been set closer to the rear edge of the bedplate, the presser bar
lifting mechanism couldbe enclosedinthe machine armso that it isnot visible onthe outside.
To mount the knee lever, push it over the lower end of vertical shaft r under the tabletop.
The lever is held in place by angular bracket s which snaps into place after transverse pin u
has entered cutouts t in right-angled coupling sleeve q (Fig. 7). When the coupling sleeve is
pushed onto the end ofthe shaft, resilient bracket s must be compressed to open it slightly
(see Fig. 7).
Motion istransmitted from the vertical shafttothe presser footby means ofa crank, aconnection
and a bellcrank lever which raises the presser foot. A small hand lever C (Fig. 9) serves to
lock the presser foot inits highest position. This lever is flicked to the left to retain the presser
foot after it has been raised by knee action.
To facilitate tilting the sewing head back without removing the knee lever completely, the
knee lever rock shaftis no longer screwed to the angular sleeve, but rather held in place bya
spring-loaded pin V (Fig. 7). As a result, the knee lever can be pulled forward off its shaft
with ajerk.
A new feature ofthis knee leveris a hinged knee platefitted with a foam plastic pad which is
contoured to hug the operator's knee.
R 9158
Fig. 7
10
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