When using first-rate thread, the sewing
speed
may
even be increased to
2,200 r.p.m. For this purpose, mqtor pulley No.
99058,
with diameters
of
4^/32"
and
is avoi-loble
at
extra
cost.
When ordering motor pulleys,
please
specify the
diameter
of the motor
shaft.
In
those
cases
where
a
motor
with
a
higher
speed
is
already
on
hand
end
has to be used, a
speed
reducer will be furnished for the
PFAFF
3114 when
set
up on individual
power
table. The
type
of
speed
reducer
required
should be specified on the order. High-speed motors
are
not recommended
because
the small pulleys
they
require
have
very
unfavorable
transmission
ratios.
To facilitote mounting the PFAFF 3114 on an existing
power
benching
system,
it is
advisable
to
procure
from us a
table
fop in the
proper
length
and with the
necessary
cutouts
and
holes. From the line
shaft
pulley,
power
is
conveyed
to
ihe
machine
by
means
of
two
jockey
pulleys
and
one
two-
speed
pulley.
With a line
shaft
speed
of
300 r.p.m., a line
shaft
pulley
of
9^'/32"
diameter
is
required
to
obtain
a
sewing
speed
of
1,800 s.p.m.
When
using
thread
of
a
superior
quality,
a line
shaft
pulley
of
11
diameter
may
be
used
after
the breaking-in
period
so
as
to
obtain
,a
sewing
speed
of
2,200 s.p.m.
Photo
3
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