hobbylock 783 User manual

4
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Notes
on
safety
A)
Owing
to
the
up
and
down
movement
of
the
needle
and
the
upper
knife,
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.
0)
The
drive belt
must never
be
adjusted
by
anyone
but
an
authorized
Pfaff
agent.

Parts
of
the
sewing
machine
Electrical
connection
Master
switch
and
sewing
light
Foot
control
.
.
Notes
on
safety
.
.
Installing
the
thread
spool
stand
Opening
the
looper
cover
..
V
Threading
guide
wires
and
the
thread
guides
Threading
the
right
looper
Threading
the
left
looper
Threading
the
needle
Thread
reel
change
on
threaded
machine
.
Inserting
the
lint
box
Seam
allowance
V V
V
Sewing
test
Points
to observe
during
sewing
Securing
the
seam
Axial
blocking
of the
upper
knife
Setting
the
standard
thread tensions
.
.
Correcting
the
thread
tensions
Thread
chart
for
3-thread
overedge
seam
Setting the
stitch
length
V
Disengaging
the
upper
knife
Adjusting
the
seam
width
Changing the
sewing
foot
Rolled
hems
Changing
the
needle
Changing
the
knives
Changing
the upper
knife
Changing
the lower
knife
Changing the
light
bulb
. .
.. .
V
Cleaning
the
thread
tensions
Oiling
the
machine
Sewing problems
and
their
removal
. .
Accessories
Thread
spool
net/thread
unreeling
disc
. .
Specifications
Contents
of
the
cardboard
box
Contents
2,3 4 4 5 5 6 7
behind
the
carrying
handle
. ..
7
8 9 10 10 11 11 12 13 14 14 15 16 17 17 18 18 19 20,21 22 22 23 24 25 25 26 27 28 28 29 29

Parts
of the
sewing
machine
Thread
spool
stand
Carrying
handle
Needle
thread
tension
dial
Housing
cover
Right
looper
thread
tension
dial
Left
looper
thread
tension
dial
Thread
tension
cover
Lint
box
Handwheel
Looper
cover
with
recess
Upper
knife
Work
support
(swiveLtype)
Needle
plate
Sewing
foot
Needle
bar
Sewing
foot
lifting
lever
Thread spool
holder
Thread
guides
Thread
guide
bar
Machine
socket
Master
switch
Rear
thread
guide
(4
x)
Feet
Accessory
box
Stitch length
adjustment
knob
Seam
width
adjustment
knob
Rotary
lever
for
upper
knife
disengagement
28 Foot control
29
Foot
control
plug
for
machine
socket
30
Mains
plug
31
Right
looper
32
Left
looper
33
Lower
knife
34
Lower knife
retaining
screw
35
Retaining
screw
of
upper
knife
36
Thread spool
centering piece
37
Accessories
retainer
38
Retaining
screw
for
blocking
the
upper
knife
30
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
3.
31
32
.35

Electrical
connection
Use
this
machine
only on
a
fiat
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
Switching
the machine
ON
and
OFF
Power
and sewing
light
are
switched
on
and off
simultaneously
with
master
switch
12
Switching
On:
Press
switch.
Machine
and
sewing
tight
are switched
on.
Switching
off:
Press
switch
again.
Machine
and sewing
tight
are switched
off.
0
4

Foot
control
The
speed
of the [lobbylock
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
pre-selected
in
two
steps
by the
switch
on
the
foot
control
Position
Half
speed
Position
4
Full
speed
Notes
on
safety
A) Owing
to
the up
and
down
movement
of the
needle
and
the
upper
knife,
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
authuiized
Pfaff
agent.
5

Installing
the
thread
spool
stand
Loosen
clamp
screw
A a
little
and
pull
washer
up
to the
screw
head.
Insert
thread
spool
stand
1
from
the
top.
Tighten
clamp
screw
A
securely
Insert
four
thread
spool holders
17
with
centering
pieces
36
fully
in
the holes
of
the
thread
spool
stand.
Push
thread
guiding
part
18 into
guide
bar
19.
Pull up
guide
bar and
align
it so
that
thread
guides
18
are
exactly
above
the
spool holders.
6

Opening and closing
looper cover
and
work
support
Push
looper
cover
fully
to
the
right,
2
hold
it
and
swing
it
down
Fo
close
the
looper
cover, push
it
up
until
it
locks
lo
open
work
support
12.
push
it to
the
left
To
close the
work support,
push
it
to
the
right
until
it
locks.
A
threading
diagram
is
fixed to
the
machine
behind
the
looper cover
This
diagram shows
the
different
threading
paths
by
different
colors
(see
Fig.
A)
Threading
the
guide
wire of the
thread
spool
stand
and
the thread
guides
behind the
carrying
handle
The
machine must
be
threaded
correctly
First
pull
the
respective
threads
through
their
corresponding
guides
(Figs
B
and
C)
Fhen
thread
the
tensions
in the
following
sequence:
1.
right
looper
(red)
2.
left
looper
(yellow)
3.
needle
(blue)
Figure H
shows
the
threading
path
of
the
individual
threads
for
thread
guides 18
For
threading
the
guides
behind
carrying
handle 2.
the
handle
must be
pulled up
(Fig
C)
Aftei threading.
cm
rying
handle
2 must
be
pushed
dowii
igdin
)
A
B
7

Threading
the
right looper:
8
thread
the rtt
looper
in sequence
1 to
Band
tiull
opproximately
10
cm (4)
of
thread
through
the
looper
eye
(the
thread
path
s
murked red)
Important
In
order to
obtdln perfect sewing
results
the
thread
must
be
pulled
between the
tension
disco when
threading the
te
nsmns

Threading
the
left
looper:
Insert
the
left
looper
thread in
sequence
1
1
to 9
and
pull
approximately
10
cm (4
of
thread
through
the
looper eye
(the
thread
path
is
marked
yellow)
I
9

Threading
the needle
Threading of guide
wires 18 and
of the
thread guide behind the
carrying
handle
is shown on
page 7
In
the
left
hand
illustration
the threading
path is shoiiri
from
the
blue tension (1)
up to
the right needle
(6). At point
5
the
thread
must be pulled behind
the thread
retainer
After
threading the machine, push handle
2
down, and close
work
support 12
and
looper
cover 10
Cut the threads
close to the
thread spool. Place new thread
spools on
spool holders 17.
Tie the threads
still in the machine and
the new
threads
together Pull
the needle thread
out of the
needle. Now pull at the thread ends
until
the knots
are about
15
cm
past the
last thread
guide before the needles.
Cut the knots off
and pull the threads through
the
respective needle
eyes. The
looper threads
can be pulled until
past
the looper
eyes
without
interruption Pull about
10
cm of thread through the
looper eye
Thread
spool change on threaded
machine

_\
Inserting
the
lint
box:
Insert
the
two tubs
of
the
lint
box
downwards
in
the
recess of
the
looper
cover
Then push
the
bottom
of
the
box
against
the machine
For
removal
of
the
lint
box,
use
the
reverse order
Seam allowance
If the
cutting
is
guided
along
below
marking
N
on
the
looper
cover,
a
seam
allowance
of
16
mm
must
be
taken
into
consideration
when
cutting
the
fabric.
/
/
11

Sewing
test
5thN
After
threading
a
sewing
test test
should
he
made
Raise
sewing
foot lever 16,
as shown
in
the
illustration
Insert
test fabric up to
the upper
knife
and
lower the sewing
foot.
.1
Hold thread ends
with
your left hand
while turning hand wheel with your right
hand in
the direction indicated by the
arrow on the wheel. Lay the threads
back under the sewing foot.
Make
sure
that
threads have interlocked correctly.

Points
to
observe
during
sewing
Place the fabric
completely under
the
sewing
foot
when
starting to sew
(Also
after the
machine
has been
rethreaded)
Sew
the
first
stitches
slowly
Since the
fdbric is fed
automatically,
do
not
pull or
push the
fabric Use
your
hand
for
guiding only
Sew
approxirriately 5
cm
beyond
the
end
of the
seam
and use
a
scissors
to
cut
the
thread
chain.
13

Securing the seam:
Blocking
the
upper
knife
Knot
the
thread
chdin
For
knit
fabrics,
a crochet needle can
be
ued
to
pull
the
thread
chain
into
the
eani
Or:
Sew
about
5
cm
(2
beyoi
d
the
end
of
scam
Then
turn
the
work
piece
around
and sew
a
few
stitches ovei
the
seam
just
sewn
without
cutting
the
thread
chain
Sewing
very
thick
fabrics and
workpieces
with
different
thicknesses:
On this
machine,
all
kinds
of fabric from
extremely
thin
to
extremely thick
can
be
processed
Plheni
sewing
extremely
thick
fabrics
or
wonkpieces
with
different
thicknesses
the
screw
of
the
upper
knife
must
be
tightened,
as
shown
in
the
illustration
By
tightening
ft
ie screw, axial
movement
of
the
upper
knife
is inhibited
Note:
When sewing
thin
or
medium fabrics,
the
screw
of
the
upper
knife
holder
must
be
loosened
by
about
2
turns,
so
that
the
upper
knife
can move
axially.
14

Heverse
side
Setting
the
standard
thread tension
N
Wj\
The thread
tension
to be set depends
on the fabric
type
and thread size
used
Set the
N
on the
thread tension
dials
opposite the
front
edge of thread
tension
cover
7
(see
Hustration
below>
Make
the
correct adjustment
after
examination
of the
interlocking
of
threads
(the
Hustrator on
the left shows
a correct
seam)
Page 16
lists
examples
for correction
of
the
individual
thread tensions
0
/
;
i/
.1
//
;;1
t
/
i
i•’
Left
Iou
per
thread
Right
looper
thread
Needle
Top
side

Feerse
side
Correcting
the
thread
tensions
k)J
side
0
C
D
When
the
thread
tension
is
turned
in
(+)
direction the
tension
is
increased
When
turned iii
(
>
direction
it
is
decreased
The
needle thread
A
is
too
loose
(blue
thread
tcniori)
The
right
looper
thread
C
is
too loose
(red
thread
tension)
or
the
left
looper
thread
D
too tight
(yellow
thread
tension>.
The
left
looper
thread
0 is
too loose
(yellow
thread
tension)
or
the
right
looper thread
C
too
tight
(red
thread
tension>.
C

Thread
chart
for
3-thread overedge
seam
Material
hread
Stitch
length
Light
materials
Organdy,
light-knit
Cotton
No
80-
1
(JO
2.0
to
4
0 mm
fabric,
Taffeta,
silk,
Silk
No
80-100
lining
materials
Synthetic
thread
No.
70—
140
Medium-heavy
materials.
Cotton
No
60--lOU
20
to
40
mm
Cotton,
tricot,
Silk
No
50-100
linen,
dress
materials
Synthete
thread
No.
70—140
Heavy
materials:
Tweed, suit
materials,
Cotton
No. 40—60
2.0 to
50
mm
denim,
heavy
cloth
Silk
No.
40-60
Synthetic
thread
No
70—140
Knit
fabrics:
Cotton
No.
40-60
2.0
to
5.0
mm
Silk
No.
40-60
Synthetic
ttiread
No.
70—140
Rolled
hem
Polyester
thread
No.
120—140
1.0
to 20mm
Mercerized
thread
(bulk
thread)
Setting
the
stitch
length
Open
work
support
12.
Hold
hand
wheel
9
fast
and
set
stitch-length adjustment
knob
25
at
the
stitch
length
desired
between
1
arid
5
mm
Standard
setting
N
is
3 mm.
17

L
\
N,
1
kf[J)
Disengaging
the
upper
knife
Remove
lint
bn
8
Open
work support
12
arid
looper
cover
10
If
necessary,
loosen
screw
‘38
for
axial
upper
knife
hi
ock
ng
Push rotary
lenr
27
of
the axial
upper
knife
guide full,’
to
the rrght,
hold
it,
and
turn
it
forwards
until
pin
A
engages
in
the
hole nf
the
knife
Now
the upper
knife
is
disengiged
Adjusting
the
seam
width
The standard
scorn
width
setting
is
marked
with
N
(3
5
mm).
Disengage
the
upper
knife
according
to
the
above
description
The
desired seam
width
is
set
with
adjusting
knob
2b
The
scale
on
the
seam
width
adjustment
knob
ranges
from
3
to
5.
Set the
upper
knife
at
its
basic
position
again
and
close
the looper
cover.
When
processing
thick
fabrics,
securely
tighten
screw
38 for
blocking
the upper
knife,
see
page
14
Sew
a
test
sewn
Note,
Atler
adjusting
the
seam
width,
it
may
be
necessary
to
re
aillust
the
thread
tension.
A
2
(