Pfaff hobbylock 797 Owner's Manual - Page 39
Changing, upper, knife
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Changing the upper knife: Pull out the mains plug. For disengageing the upper knife, see page 29, L Unscrew the knife retaining screw and remove upper knife, To replace the upper knife, insert the retaining screw through cutout (1) of the knife. Screw it into threaded hole (2) of the knife holder. Tighten slightly and set the upper knife in the cutting position. Turn the hand wheel counter-clockwise until the upper knife is in its lowest position. The front edge of the upper knife should be 0.5 to 1.0 mm lower in this position than the surface of the needle plate. Adjust the upper knife accurately and tighten the retaining screw securely.
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Changing
the
upper
knife:
Pull
out
the
mains
plug.
For
disengageing
the upper
knife,
see
page
29,
L
Unscrew
the
knife
retaining
screw
and
remove
upper
knife,
To
replace
the
upper
knife,
insert
the
retaining
screw
through
cutout
(1)
of
the
knife.
Screw
it
into
threaded
hole
(2)
of
the
knife
holder.
Tighten
slightly
and
set
the
upper
knife
in
the
cutting
position.
Turn
the
hand
wheel
counter-clockwise
until
the
upper
knife
is
in
its
lowest
position.
The
front
edge
of
the
upper
knife
should
be
0.5
to
1.0
mm
lower
in
this
position
than
the
surface
of
the
needle
plate.
Adjust
the
upper
knife
accurately
and tighten
the
retaining
screw
securely.