Pfaff Hobbylock 784 User manual

747!
instruction
manual
ii;
II.
I
V

Notes
on
safety
A)
Owing
to
the
up
and
down
movement
of
the
needles
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
authorized
Pfaff
agent.

*
t)
-
p..)
0)
-
()
(V
C

4
4
5
6
7
7
8
8
9
10
10
11
11
12
13
14
14
15
16
17
18
18
19,20
21
21
22
23
23
24, 25
26
26
27
28
29
30
31
31
32
32
&
2. 3
Contents
Controls
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
Threading
guide wires
18 and the
thread
guides
behind
4-thread
overedge seam
Threading
the right looper
Threading
the left looper
Threading the
left and
right
needle
Thread
reel change
on threaded
machine
Inserting
the lint
box
Seam allowance
Sewing
test
Points to
observe during
sewing
Securing
the seam
Axial
blocking of
the
upper knite
Setting
the standard
thread
tensions
Correcting the
thread tensions
3-thread overedge seam
Thread
chart
Adjusting
the
stitch length
on hobbylock
784
and
786
Adjusting
the differential
feed (hobbyfock
786) . .
Disengaging
the
upper
knife
Adjusting
the
seam
width
Changing
the
sewing foot
Changing the
light
bulb
Cleaning
the thread
tensions
Rolled hems
Changing
the
needles
Changing
the knives
Changing
the
upper
knife
Changing
the lower
knife
Oiling
the
machine
Sewing problems
and their
removal
Accessories
Thread
spool net/thread
unreeling
disc
Specifications
Contents of
the cardboard
box
the carrying
handle .

I
Controls
of the
sewing machine
1
Thread
spool
stand
2
Carrying
handle
3 Left
needle thread
tension
dial
4
Right
needle
thread
tension dial
5
Right
looper
thread
tension dial
6
Left
looper
thread
tension dial
7
Thread
tension cover
8
Lint
box
9
Handwheel
10 Looper
cover with
recess
11 Upper knife
12
Work
support
(swivel-type)
13
Needle plate
14 Sewing foot
15
Needle
bar
16
Sewing foot lifting
lever
17
Thread
spool
holder
18
Thread
guides
19
Thread guide
bar
20
Machine
socket
21
Master
switch
22
Rear thread
guide
(4
x)
23
Differential
feed
adjustment
knob
24
Accessory
box
25
Stitch
length
adjustment
knob
26
Seam
width adjustment
knob
27 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
screw
35
Retaining
screw
of upper knife
36
Thread
spool centering
piece
37
Accessories
retainer
38
Retaining
screw for blocking
the
upper knife
3

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.
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
light
are switched
on.
Switching
off:
Press
switch
again.
Machine
and sewing
light
are switched
off.
4

Foot control
A)
Owing
to
the
up
and
down
movement
of
the
needles
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
authorized
Pfaff
agent.
5
The
speed of
the
Hobbylock
is
regulated
as
follows:
The
more
you
press
the
foot
control
down,
the
faster
the machine
will
sew.
Electronic
foot 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

Installing
the thread
spool
stand
Loosen
clamp
screw
A
alittle
and
pull
washer
up to
the screw
head.
Insert
A
/
thread
spool
stand
1
from
the
top.
Tighten
clamp
screw
A
securely.
________I
4
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
I
thread
guides
18
are
exactly
above
the
spool holders.
6

I
n
E1
H
Opening
and
closing
looper
cover
and
work
support
Push
looper cover
fully
to
the
right.
hold
it,
and
swing
it
down.
To
close the
looper
cover,
push
it
up
until
it
locks.
To
open
work
support
12,
push
it
to
the
left.
To
close
the
work
support,
push
it
to
the
right
until
it locks.
A threacing
diagram
is fixed
to the
machine
behind
the
looper
cover.
This
diagram
shows
the
different
threading
paths
by
different
colors
(see
Fig.
A).
C
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).
Then
thread the
tensions
in the
following
sequence:
1.
right
looper
(red)
2.
left
looper
(yellow)
3.
right
needle
(green)
4. left
needle
(blue)
Figure
B
shows
the
threading
path
of
the
individual
threads
for
thread
guides
18.
For
threading
the guides
oehind
carrying
handle
2,
the
handle
must
be
pulled
up
(Fig.
C).
After
threading,
carrying
handle
2
must
be
pushed
down
again.
1
7

4-thread
overedge
seam
This
seam
is
sewn
with
two
needle
2
1
threads
and
two
looper
threads.
-
The
3-thread
overedge
seam
is
-
described
on
page
17.
3
Threading
the
right
looper:
Thread
the
right
looper
in
sequence
1
to
9
and
pull
approximately
10 cm
(4”)
4
of
thread
through
the
looper
eye
(the
thread
path
is
marked
red).
Important:
In
order
to obtain
perfect
sewing
results,
-
the thread
must
be
pulled
between
the
tension
discs
when
threading
the
7
5
-
tensions.
6
If’
5,
/2
8
/
1
5
H
6
8