Pfaff hobbylock 797 Owner's manual

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Notes
on
safety
A)
Owing
to
the
up
and
down
movement
of
the
needle,
the
user
must
take
sufficient
care
to
avoid
injury
and
observe
the
sewing
area
continuously
while
sewing.
B)
When
leaving
the
machine,
changing
parts
or
accessories,
the
machine
must
be
disconnected
from
the
power
source.
C)
The
maximum
approved
wattage
of
the
light
bulb
is
15
watts.
D)
The
drive
belt
must
never
be
adjusted
by
anyone
but
an
authorized
Pfatf
agent,
contents
Controls
of
the
sewing
machine
2,
3
Accessory
box
4
Electrical
connection
4,
5
Foot
control
5
Installing
the
thread
spool
stand
6
Threading
diagram
on
the
lint
box
7
Needle
combinations
8
Threading
the
right
looper
9
Threading
the
left
looper
10
Threading
the
two-thread
chainstitch
looper
1
1
Threading
the
needles
12
Inserting
the
lint
box
13
Setting
the
standard
thread
tension
14
Sewing
test
15
Points
to
observe
during
sewing
16
Securing
the
seam
17
5-thread
safety
seam,
2-thread
chainstitch
with
overedge
stitch
18
3-
and
4-thread
overedge
seam
19
Checking
and
adjusting
the
thread
tension
20—22
Regulating
the
sewing
foot
pressure
22
3-thread
overedge
seam
23
Thread
chart
for
5-thread
overedge
seam
24
Thread
chart
for
4-thread
overedge
seam
25
Adjusting
the
stitch
length
25,
26
Adjusting
the
differential
teed
27,
28
Disengageing
the
upper
knife
29
Disengageing
the
overedge
looper
29
Adjusting
the
machine
for
two-thread
chainstitch
seam
29,
30
Inserting
the
workpiece
guide
plate
30
Adjusting
the
seam
width
31
Changing
the
sewing
foot
32
Sewing
rolled
hems
33,
34
Changing
the
needles
35
Changing
the
lower
knife
36
Changing
the
upper
knife
37
Changing
the
light
bulb
38
Cleaning
the
thread
tensions
38
Oiling
the
machine
39
Sewing
problems
and
their
removal
40
Accessories
41
Specifications
41
Thread
spool
net
42
Optional
accessories
42—44
1
Controls
of
the
sewing
machine
1
Foot
pressure
regulating
dial
2
Thread
guide
3
Carrying
handle
4
Left
needle
thread
tension
dial
5
Right
needle
thread
tension
dial
6
Right
looper
thread
tension
dial
7
Left
looper
thread
tension
dial
8
Looper
thread
tension
dial
for
two-
thread
chainstitch
9
Thread
tension
cover
10
Knife
guard
11
Hand
wheel
and
feed
regulator
12
Looper
cover
13
Looper
cover
recess
14
Upper
knife
15
Work
support
16
Differential
feed
adjustment
knob
17
Needle
plate
18
Sewing
foot
19
Needle
bar
20
Sewing
foot
lifting
lever
21
Thread
spool
stand
22
Thread
spool
holder
23
Machine
socket
24
Master
switch
25
Lint
box
26
Foot
control
27
Foot
control
plug
28
Mains
plug
29
Lower
knife
30
Knife
clamp
screw
31
Right
looper
32
Left
looper
33
Two-thread
chainstitch
looper
34
Thread
guides
behind
the
carrying
handle
35
Seam
width
adjustment
knob
behind
work
support
15
27
31
I
Accessory
box
Open
the
work
support
and
pull
out
the
accessory
box.
To
replace
the
accessory
box,
slide
it
into
the
grooves
and
push
it
in
as
far
as
it
will
go.
The
accessories
are
illustrated
on
page
41.
Electrical
connection
Use
this
machine
only
on
a
flat
surface
or
on
a
special
sewing
table.
Connecting
the
foot
control:
Insert
the
plug
of
the
control
in
the
machine
socket.
Then
connect
the
mains
plug
to
a
power
source.
Caution:
When
the
machine
is
not
in
use,
switch
it
off
at
the
master
switch
and
disconnect
the
plug
from
the
power
source.
Do
not
place
any
objects
on
the
foot
control.
j
Switching
the
machine
ON
and
OFF
1
Power
and
sewing
light
are
switched
on
and
off
simultaneously
with
the
master
switch.
Foot
control
The
speed
of
the
Hobbylook
is
regulated
as
follows:
The
more
you
press
the
foot
control
down,
the
faster
the
machine
will
sew,
Electronic
toot
control
Maximum
speed
can
be
preselected
in
two
steps
by
the
switch
on
the
foot
control.
Position
=
Half
speed
Position
44
=
Full
speed
Switching
on:
Press
switch.
Machine
and
sewing
light
are
switched
on.
Switching
off:
Press
switch
again.
Machine
and
sewing
light
are
switched
off.
5
Installing
the
thread
spool
stand
Loosen
clamp
screw
a
little
and
pull
washer
up to
the
screw
head.
Insert
thread
spool
stand
from
the
top.
thread
spool
holders.
Push
the
thread
guiding
part
into
the
guide
bar.
Pull
up
guide
bar
and
align
it
so
that
the
Tighten
clamp
screw.
Insert
the
five
thread
guides
are
exactly
above
the
spool
holders.
behind
it:
Insert
fingers
into
groove
of
the
carrying
handle
and
pull
it
up,
then
the
Carrying
handle
and
thread
guides
thread
guides
34
will
be
visible.
Opening
and
closing
looper
cover
and
work
support
Push
looper
cover
to
the
right
and
swing
it
down.
To
close
the
looper
cover,
push
it
up
until
it
locks.
To
open
the
work
support,
push
it
to
the
left.
To
close
the
work
support,
push
it
to
the
right
until
it
locks.
Selecting
the
stitch
type:
Behind
the
looper
cover,
the
individual
stitch
types
from
1
to
6
are
shown.
The
respectively
necessary
needle
combinations
(A,
B.
and
C)
and
the
thread
tensions
to
be
used
are
indicated
by
colors.
Below
this,
a
needle
diagram
with
the
respective
set
screws
is
shown.
Threading
paths
of
the
stitch
types
on
the
back
of
the
lint
box
The
right-hand
side
shows
the
stitch
types
(1—6)
with
the
respective
adjustment
points
A.
Each
threading
path
has
its
own
color.
Position
the
slide
so
that
the
adjustment
point
of
the
stitch
type
desired
(1—6)
is
filled
out
orange.
Now
thread
along
all
threading
paths
marked
with
color,
see
pages
9—i
2.
Additionally,
at
B
it
is
possible
to
see
whether
the
overedge
looper
has
to
be
engaged
or
disengaged
(see
page
29>.
The
color
markings
of
the
threading
paths
required
are
additionally
indicated
on
the
table
behind
looper
cover
12
7
Threading
procedure
Threading
must
be
done
correctly
to
obtain
a
well-formed
seam.
Thread
the
machine
in
the
following
sequence:
1.
Right
looper
(green)
2.
Left
looper
(yellow)
3.
Chainstitch
looper
(mauve)
4.
Needle
thread
tension
(blue)
5.
Needle
thread
tension
(pink)
Diagram
B
shows
threading
of
the
thread
guides
behind
the
carrying
handle.
Diagram
C
shows
threading
of
the
thread
tensions.
Now
pull
the
respective
thread
into
the
corresponding
guides
and
tension
discs.
When
threading
is
completed,
push
the
carrying
handle
fully
down
again.
Needle
combinations
On
the
table
behind
looper
cover
12,
the
needle
combinations
for
stitch
types
ito
6
are
indicated.
Remove
the
needles
that
are
not
necessary
by
loosening
set
screws
A,
B,
or
C
(For
needle
change,
see
page
35.)
B
AS
Threading
the
nght
looper:
Thread
the
right
looper
in
sequence
1
to
9
and
pull
approximately
10
cm
(4”)
of
thread
through
the
looper
eye
(the
thread
path
is
marked
green).
Important:
In
order
to
obtain
perfect
sewing
results,
the
thread
must
be
pulled
between
the
tension
discs
when
threading
the
tensions.
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Threading
the
needles
The
needles
must
be
threaded
in
sequence
blue
pink.
Threading
the
two-thread
chainstitch
needle
(A):
Thread
the
two-thread
chainstitch
needle
in
sequence
1
to
7.
The
thread
path
is
marked
blue
(triangular
symbol).
Important:
At
point
6,
pull
the
thread
into
the
guide
wire
eye
from
the
right,
then
pull
about
5
cm
(2”)
of
thread
through
the
needle
eye.
Threading
needle
B
or
C
(with
or
without
needle
A).
Thread
the
overedge
needle
in
sequence
1
to
6.
The
thread
path
is
marked
pink
(point
symbol).
Important:
At
point
5,
pull
the
thread
from
the
right
behind
the
black
thread
retainer
and
the
thread
guide
wire
above
it.
Then
pull
about
5
cm
(2”)
of
thread
through
the
needle
eye.
Threading
overedge
needles
B
and
C
(without
needle
A).
Thread
overedge
needles
B
and
C
in
sequence
1
to
6.
The
thread
path
for
needle
B
is
marked
blue
(point
symbol),
the
one
for
needle
C
is
marked
pink
(point
symbol).
In
this
case,
pull
both
threads
behind
the
black
thread
retainer
and
the
thread
guide
wire
above
it.
Then
pull
about
5
cm
(2”)
of
thread
through
the
needle
eyes.
Important:
Only
sew
with
either
one
or
two
needles
(depending
on
stitch
type).
Now
close
the
work
support
(1),
push
the
handle
down
(2)
and
close
the
looper
cover
(3).
Inserting
the
lint
box:
Insert
the
tabs
of
the
lint
box
into
the
slots
(4)
of
the
front
cover.
Seam
depth
scale
Example:
If
the
seam depth
of
the
cutting
is
to
be
20
mm,
the
cut
fabric
edge
must
be
guided
along
the
2Omm
mark on
knife
guard
10.
Push
the
lint
box
up
against
the
front
cover
until
it
snaps
in
place.
Use
the
reverse
order
to
remove
lint
box.
Setting
the
standard
thread
tension
The
thread
tension
to
be
set
depends
on
the
fabric
type
and
thread
size
used.
Make
the
correct
adjustment
after
examination
of
the
interlocking
of
the
threads
(see
pages
18
to
22).
Set
the
N
on
the
thread
tension
dials
opposite
the
respective
color
symbol.
Only
for
the
blue
thread
tension
there
are
two
standard
settings:
When
using
needle
A
(only
for
two-thread
chainstitch),
the
N
must
be
set
opposite
the
blue
triangular
symbol.
Only
for
stitch
type
6
(needles
B
and
C),
the
standard
thread
tension
N
for
needle
B
must
be
set
opposite
the
blue
point
symbol.
The
mauve
tension
is
only
needed
for
two-thread
chainstitch.
-j
Sewing
test
After
threading,
a
sewing
test
test
should
be
made.
Raise
sewing
foot
lever
20.
as
shown
in
the
illustration.
Insert
test
fabric
up
to
the
upper
knife
and
lower
the
sewing
foot.
Hold
thread
ends
with
your
left
hand
while
turning
hand
wheel
with
your
right
hand
in
the
direction
ndicated
by
the
arrow.
In
doing
so.
the
threads
must
be
guided
to
the
rear,
under
the
presser
foot
Make
sure
that
threads
have
inter
locked
correctly.
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Securing
the
seam:
Or:
Knot
the
thread
chain.
For
knit
fabrics,
a
crochet
needle
can
be
used
to
pull
the
thread
chain
into
the
seam.
Sew
about
5
cm
(2)
beyond
the
end
of
seam.
Then
turn
the
workpiece
around
and
sew
a
few
stitches
over
the
seam
just
sewn
without
cutting
the
thread
chain.
On
this
machine,
all
kinds
of
fabric
from
extremely
thin
to
extremely
thick
can
be
processed.
When
sewing
extremely
thick
fabrics
or
workpieces
with
different
thicknesses,
the
screw
of
the
upper
knife
must
be
tightened,
as
shown
in
the
illustration.
When
sewing
thin
or
medium
fabrics,
the
screw
of
the
upper
knife
holder
must
be
loosened
by
about
2
turns.
Explanation:
The
screw
of
the
upper
knife
holder
serves
to
tighten
or
loosen
the
horizontal
guide
of
the
upper
knife.
17
Face
side
I
I
Two-thread
chain-
stitch
top
side
I
I
Two-thread
chainstitch
Stitch
type
1.
sewn
with
needle
A
Thread
tensions:
blue
=
triangular
symbol
mauve
=
triangular
symbol
Application
examples:
Joining
seams
on
linen
goods,
jeans,
without
serging
seam.
_______
Two-thread
chainsttch
underside
Reverse
side
Face
sice
Two
thiead
chain-
stitch
top
side
Overedge
stitch
top
side
r
-.
Overedge
stt
h
underside
‘-
Two-thread
Reverse
side
Cli
a
n
at
t
cii
underside
5-thread
safety
seam
Two-thread
chainstitch
with
overedge
stitch
(narrow)
Stitch
type
2,
sewn
with
needles
A
and
C
Thread
tensions:
blue
=
triangular
symbol
pink
=
point
symbol
green
=
point
symbol
yellow
=
point
symbol
mauve
=
triangular
symbol
Application
examples.
Joining
seams
on
blouses,
shirts,
jeans
and
bed
linen
with
serging
seam
5-thread
safety
seam
Two-thread
chainstitch
with
overedge
stitch
(wide>
Stitch
type
3.
sewn
with
needles
A
and
B
Thread
tensions
blue
triangular
symbol
pink
=
point
symbol
green
-=
point
symbol
yellow
=
point
symbol
mauve
=
triangular
symbol
Application
examples:
Same
as
stitch
type
1
and
2
but
with
wide
serging
seam.
Face
side
Two
thread
chain
stitcn
top
side
--
Reverse
side
chainstitch
u
ndersde
/