Feed Dogs Adjustment - Singer 812U Instruction Manual

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Caution:
The above-mentioned adjustment is not necessary because your machine has already been adjusted on the assembly line.
If a readjustment should become necessary, exercise great care not to damage the knives due to excessive engagement of the
upper and lower knives.
15]. Feed dogs adjustment
(1) Loosen screw
~,
and raise ar lower differentiaI feed dog
(front)
4D
to the correct height.
Loosen screw
fj and adjust main feed dog (back)
4D .
0.3 - 0.5 mm
'--4D
L-----41f)
(In case of chaining-off hardly come out.)
(2) Tum the pulley until the feed dogs are raised to thehighest position, and adjust them to the following height above
the top of the throat plate.
{
1.0mm for light materiaIs.
1.3 mm for medium-heavy materiais.
1.5 mm for heavy materiaIs.
(3) Install chaining-off feed dog
~
at the sarneheight as main feed dog (back)
4D .
If free chain stitches hardly come out, lower it as shown in above right.
. I NSTALLATION. AND ADJUSTMENT
o
OF ATTACHMENTS '
, ' o •
m.
Taping
o
8
8 -
About I
mm$
(1) Replace the presser foot assemb1y with presser foot for taping
O,
(2) Install tape guide8 on face p1atecover@).
(3) Sewn stitches will be as shown at above.
(Sew tape on only in case of serging.)
Caution:
Se1ect a bight so the right edge of tape
will not be cut by the knives.
Otherwise, tape rnay not be sewn on in
a satisfactory way.
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