Pfaff 360 User Manual

Mechanical Principle of Automatic Machines
If you want to sew decorative seams on on ordinary · zigzag sewing machine,
you hove
to move stitch width dial A, needle posit i on lever B or finger-tip
control F in rhythm, as may be required to produce the respective embroidery
design. This is no easy matter and requires a great deal of pract ice and skill.
Ornamental stitching is greatly simplified, however, if a special mechanism is
built into the .machine which operates the . above • mentioned controls auto-
matically . A machine incorporating an automatic embroidery mechanism of
this sort is called an "Automatic".
The mechanical principle of indirect contro l incorporated 1n an Automat ic 1s
shown in Fig. 42 below.
Feeler
finger 2 rides on the rim of pattern com 3 and, via a lever assembly,
transmits
the varying throws of the revolving com to zigzag regulator stud 5.
As a result, the
slot at the bock of this stud constantly changes its direction
and, thus, .alters the stitch width. This is how a decorative seam is produced
(see samples illustrated in Fig. 43) .
1
Fig. 42 Diagram showing the mechanical
principle
of indirect needle bor
from e control
z
1 = Pivot 7 = Need le bor frame pitman
2
= Feeler finger 8 = Needle bight of
3 = Pattern com
1
/ u•, or 4.0 mm
4 = Slide block 9 = Needle plate
5 = Zigzag regulator stud 10 = Needle bar
6 = Needle vibrating 11 = Needle bar frame
eccentric
0 = No needle throw
(straight stitch)

Pfaff 360 Specifications

General

Brand	Pfaff
Model	360
Category	Sewing Machine
Language	English