Pfaff 360 User Manual

The Electric Drive
1. General
All domestic sewi ng machines are equipped with series motors which are
characterized by the fact that their speed is dependent upon the load. This
being so, a certain
rat io must be observed between their output and their
speed.
If the motor is too powerful for the job at hand, it is li kely to disturb
the
balance of the electrical system and to cause premature wear of, or
even damage to, the sewing machine.
2. The Speed Control
The motor speed depends not only on the torque required to drive the
machine, but
also on the voltage applied to the motor. Th is fact is used to
control the motor speed.
A
variable resistor is placed in the motor circuit. This rheostat is available
as a foot, knee, or treadle control (Figs. 57-59), as may be desired by the
customer.
I
7
4
1 = Combinot1on plUg
2 = Double receptacle
3 = Safety pJug
4 = Foot control
Fig.
56 B uilt-in Pfaff PE 370
motor
5 = Light switch
6 = Light bulb with grille
(swing-out type)
7 = Moto r with radio noise
filler
33

Pfaff 360 Specifications

General

Brand	Pfaff
Model	360
Category	Sewing Machine
Language	English