Pfaff 3334 User Manual

1 — Feed cam
2 = Roller stud
3 = Roller
4 = Feed regulotor
5 = Bearing bracket
6 = Slide block
7 = Guide plate
8 ~ Feed plate
9 = Swivel clamp
10 = Thumb screw
11 = Feed regulator swivel
12 = Feed regulator post
13 = Worm wheel shaft
14 = Worm wheel
15 = Feed cam driving worm
16 = Arm shaft
Fig.9 Feed lengthwise motion (cross section)
The adjustment possibilities inherent in the feed regulator and feed across
regulator ore not sufficient to produce larger tacks. Such tacks, however,
can be made with the aid of special organizational parts which provide for
a larger amount of work clomp travel lengthwise and ocross the machine bed.
c. Automatic Stop Motion
The machine is stopped automatically in order to ensure that all tacks will
be sewn with exatly the some number of stitches and that the machine will
always be in the same position when a new needle cycle begins. The shape
of the pattern-forming groove and the gear ratio of the worm gear ossem-
bly are determined by the number of stitches per tack.
The automatic stop motion is operated by the stop tripping segment on the
rim of the feed cam
(Fig. 10). When this tripping segment depresses the trip
ping lever, the latch at the lower end of the stop motion lever slips out of the
catch on the tripping lever so that the stop
motion lever can be pulled against
the stop com by a tension spring. Shortly before the stop com has completed
its last revolution, the stop link hits its surface and snaps into its groove, there
by causing the machine to stop. To absorb the momentum of the machine at
this sudden stop, the Pfaff 3334 isequipped with double buffersprings.
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From the library of: Superior Sewing Machine & Supply LLC

Pfaff 3334 Specifications

General

Brand	Pfaff
Model	3334
Category	Sewing Machine
Language	English