Pfaff hobbyblock 794 User manual

74
0
Instruction
manual
I

Notes on safety
A) Due 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 Pfaff
agent.

Contents
The
controls of
the
sewing
machine
2, 3
Accessory
box
4
Electrical
connection
4,
5
Foot
control
5
Preparing
for
threading
6, 7
Threading,
4-thread
double-overedge
seam
7—11
Threading
right
looper
8
Threading
left
looper
9
Threading the
needles
10
Inserting the
lint
box
11
Sewing
test
12
Points to
observe
during
sewing
13
Securing
the
seam
14
Checking
and
adjusting
thread
tension
15, 16
3-thread
overedge seam
17
Thread chart
18
Adjusting
the
stitch length
on 794
18
Adjusting
the
stitch length
on
796
19
Adjusting
the
differential
feed
on
796
20,21
Regulating
the
sewing foot
pressure
18
Adjusting
the
seam
width 22
Changing
the sewing
feet
23
Sewing
rolled
hems
24,
25
Changing
needles
26
Changing
lower
knife 26, 27
Changing
upper
knife
28
Changing
light
bulb
29
Cleaning
the
thread
tensions
29
Oiling the
machine
30
Sewing
problems and
solutions
31
Accessories
32
Specifications
32

C,’

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
28
7 Left looper
thread tension
dial
cover
///
2
11
Presser foot
lifter lever
-- /
12 Hand wheel
and feed regulator
13 Looper
cover
26
‘N
14 Looper
cover lever
15 Work support
16
Stitch length
setting key on
794
Differential feed
setting on 796
17 Needle plate
18
Presser foot
19 Needle bar
20 Thread
reel stand
27
21 Thread
reel pins
22 Adjusting knob
23
Machine plug
socket
24 Master switch
_______________________________________
25 Lint
box
26 Foot control
27 Foot control
plug
28 Mains plug
29 Lower
knife
30
Knife
clamp screw
9
31
31 Right looper
32 Left
looper
33
Thread guide
bar
32
30
if
29
I

Accessory
box
Electrical
connection
Use this
machine
only on
a
flat
surface
or on a
special
sewing
table.
Attaching
the
toot
control:
Insert the
plug
of
the
control
into
the
machine
plug socket.
Then
connect
the
mains
plug
to
a
power
source.
Caution:
When
the
machine
is
not
in
use,
disconnect
plug
from power
source.
Do
not
place any
objects
on the
foot
control.
Swing
the
work support
to
the left
and
pull
out
the
accessory
box.
To
replace
the accessory
box,
slide
it
into
the
grooves
and
push
it
until it
locks. The
accessories
are
illustrated
on
page
32.

Foot
Control
The
speed
of
the
HObbyIo
is
regula
as
follows:
When
press,g
the foot
Control
gently
the machine will
run at
low
Speed.
when
Pressing
harder
it
will
run
faster.
Electronic
foot
control
Maximum
speed
is
adjusted
in
two
grad 5
by
the
switch
on
the
foot
control
Pos,ho,,
=
Half
Speed
Posillon
4 =
Full
speed
Switching
the
machine
ON and
OFF
Power
and
sewing
light
are
switched
on
and
off
simultaneously
with
the
master
Switch
SWitching
on:
Press
switch.
Machine
and
sewing
light
are
switched
on.
Switching
off:
Press
switch
again.
Machine
and
sewing
light
are switched
off.

Preparing
for
threading
Adjustment
of
thread
reel
stand:
Loosen
the
adjusting
knob
on
the
thread
reel
stand,
slide
it
to the
left
and
tighten
it.
Adjustment
of
the
thread
guides:
Pull
up
the
thread
guide
bar
and
align
it
j
so
that
the
thread guides are
directly
above
the
reel
stand.
JL_L_LjjJ
L
N
Carrying
handle and
thread
guide bar
behind
it:
\
Insert
fingers into
the
groove
of
the
carrying
handle and
pull
it
up.
This
movement
automatically
raises
the
zr’
thread
guide
bar

Opening and
closing
looper cover
and
work
support
Push
looper
cover
lever
to
the right,
swing
cover
in
the
direction
of the
arrow
and
lower
it.
To
close
the
looper cover,
push
the
cover
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.
A threading
diagram
is affixed
to the
machine
(A).
Threading
procedure
Threading must
be
done
correctly to
obtain
a well-formed
seam.
Thread
the
machine
in
the following
sequence:
1. Right
looper
(red)
2.
Left
looper
(orange)
3.
Right
needle
(green)
4.
Left
needle
(blue)
Diagram
B shows
threading
of
the
thread guides behind
the
carrying
handle.
Diagram
C shows
threading
of
the
thread
tension.
Now pull
the
respective thread
into
the
corresponding guides
and
tension
discs.
7

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