Singer 451k45 - TO TIME THE FEED; TO CENTRALIZE FEED DOG IN THROAT PLATE SLOTS

TO Time the feed
Feeding movement Is correctly timed, for average
sewing conditions, by setting up the following align
ment;
• Timing line G2, Fig. 48 on feed driving eccentric
collar in line with timing line H2 on feed lifting con
nection, OS shown in Fig. 48, at same time that timing
line E2, Fig. 49 on rotary take-up is in line with timing'
line F2 on face plate, as shown in Fig. 49.
This alignment (see page 12) is set up before ma
chine
leaves factory.
When correctly timed ...
• The feed dog stops its feeding action and drops
below the throat plate before the needle enters
the material on its downstroke.
•" The feed dog begins its feeding action after
the needle has risen above the material.
IF FOR ANY REASON IT MAY BE NECESSARY TO
ALTER TIMING OF FEED ...
• Set machine for longest stitch, as instructed on
page 10.
• Loosen two screws A2, Fig. 48 on pulley.
• Turn hook driving shaft B2, Fig. 48, as required
to obtain desired feeding movement.
• Then securely tighten two screws A2.
• Test-run machine to make certain that desired
timing is achieved.
• Test feed assembly linkage for freedom of move
ment, Action of
feed dog must be regular and smooth
for maximum efficiency.
. Re-timesewing hook, as instructed on page 14.
TO ELIMINATE PUCKERING OF MATERIAL: Advance
feed timing very slightly.
TO CENTRALIZE FEED DOG IN
THROAT PLATE SLOTS
CHECK
Feed dog should not contact edges of throat
plate slots.
SIDEWISE SETTING
Feed dog should travel on a line midway
between sides of throat plate slots.
Feed dog can be moved toward left or right,
OS required, after loosening two screws J3 and
screw C3, Fig. 50.
By moving bearing centres at K3, Fig. 50
toward left or right, as required, rock shaft
H3, feed bar G3 and feed dog can be- moved
to desired position.
Moke certain that bearing centres K3 will
hold rock shaft H3 snugly in place without
binding, then securely tighten two screws J3.
LENGTHWISE SETTING
Set machine for longest stitch as instructed on
page 10.
Feed dog should be set so that its movement is
equidistant from front and rear edges of throat plate
slots.
18
K3 J3
\
Fig. 48. Timing the Ffied
I ,-r • ".^1. -.v -'jC
V //
'•\\v ;
Fig. 49. Timing Morks on Toke-up
and on Face Plate
JO Jut
^ i'\ hi f'V\Y®ii/h
!lrL -I 2U:1 ^1
iB I I
J3 K3
Fig. 50. Adjusting the Feed Dog
Loosen pinch screw M3, Fig. 50 and move feed bar
G3 and rock shaft H3, as required.
Securely tighten screw M3.
Set feed dog at correct height.
From the library of: Superior Sewing Machine & Supply LLC