Pfaff hobbylock 795 User manual

7—
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-
/

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,
chan
ging
parts
or
accessories,
the
ma
chine
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 safety-stitch
seam
7—11
Threading
chainstitch
looper
8
Threading
overedge
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
4-thread
safety-stitch
seam
17
2-thread
chainstitch
seam
17
2-thread
overedge
seam
17
Adjustment
of
the
machine
for
two-thread
chainstitch
seam
18,
19
Thread chart
20
Adjusting
the
stitch length
21
Regulating the sewing
foot
pressure
21
Adjusting
the
seam
width
22
Machine
care
21
Changing
the
needles
23
Changing
the
lower
knife
23,
24
Changing
the
upper knife
25
Changing
the
light
bulb
26
Oiling
the
machine
27
Accessories
28
Specifications
28
Sewing problems
and solutions
28,
29
Changing
the sewing
feet
30

(11

ontrols
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 Thread tension
cover
9
Upper
knife
10
Knife
guard
11
Presser foot
lifter
lever
12
Hand
wheel
13
Looper
cover
26
14
Looper
cover
lever
15
Work
support
16
Stitch length
setting
dial
17
Needle
plate
18
Presser
foot
19
Needle
bar
20
Thread
reel
stand
21
Thread
reel
pins
22
Adjusting knob
27
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
31
Right
looper
32 Left
looper
g
33
Thread
guide bar
30
31
29°
32
/

Accessory
box
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
28.
Electrical
connection
Use
this
machine
only
on
a flat
surface
or
on
a
special
sewing table.
Attaching
the
foot
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.
1.

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.
Foot control
The
speed of the
Hobbylock
is
regulated
as follows:
When
pressing
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
grades
by the switch
on the
foot
control.
Position
= Half
speed
Position
44
= Full
speed

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.
y
Adjustment
of
thread
guides:
Pull
up
the thread
guide bar
and
align
it
so
that
the
thread
guides
are
directly
above
the
reel
stand.
__A
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
thread
guide
bar.
6

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.
Left
looper (yellow)
2.
Right looper (red)
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 dials.
Now pull
the
respective thread
into
the
corresponding
guides and tension discs.

4-thread
safety
stitch seam
For
sewing
and
finishing
two layers
of
fabric.
Threading
the
left looper:
Turn
the handwheel
towards
you
until
the left
looper
is in
its farthest
right
position
(see
illustration
below).
Thread
the
left
looper
in
sequence
1, 2,
3, 4, 5,
6,
7, 8 and
pull
approximately
10 cm (4”)
of thread
through
the
looper
eye (the
thread
path is marked
yellow).
8

Threading
the right
looper:
Turn
the handwheel towards
you
until
the
right looper
is in
its farthest
right
position
(see
illustration
below).
Thread the
right
looper
in
sequence
1, 2, 3, 4,
5, 6, 7, 8
and pull
approxima
tely 10 cm
(4”) of
thread through
the
looper eye
(the thread
path
is marked
red).
9

Threading
the right
needle:
Thread
the right
needle
in
sequence
1,
2, 3,
4, 5 and
pull
approximately
10
cm
(4”)
thread
through
the
needle
eye (the
thread
path
is marked
green).
Thread
the
left needle
in
sequence
1, 2,
lJ—
3,
4,
5, 6, 7, 8
and
pull approximately
10
cm
(4”)
thread
through the eye
of
the
left needle
(the
thread
path
is
1
1j
marked
blue).
fl
L
lii
6
r 3
--
(
2
85
o2j2

2
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.
if
Push the lint
box
up
against the front
cover until it snaps in
place.
Use the
reverse order to remove lint
box.

Sewing
a
test
sample
Place
a
piece
of
fabric
under
the
needle
and
lower
presser
foot.
Hold
thread
ends
with
your
left
hand
while
turning
hand
wheel
counter-clock
wise
with
your
right
hand.
Make
sure
that
threads
have
interlocked
correctly.
After
threading,
a
test
sample
should
b
sewn.
Raise
presser
foot
lever,
as
shown
in
illustration.
12

Points
to observe
during
sewing
Place the
fabric
completely
under the
presser
foot
when starting
to sew.
(Also
after
the
machine
has been
re-threaded).
Sew
the first
stitches
slowly.
Since
the fabric
is fed
automatically,
do
not pull
or
push the
fabric.
Use your
hand
for
guiding
the
fabric
only.
Finishing
seam
Sew
approximately
10
cm (4”)
beyond
the
end of
the
seam and
use
the thread
cutter
(1) behind
the
presser
foot
to cut
the thread
chain.

Securing
the
seam:
Knot
the
thread
chain.
In
case
of
knitted
fabrics,
a
crochet needle
can
be
used
in
order
to
pull
the
thread
chain
into
the
seam.
Or:
Sew approximately
3
cm
(1”)
beyond
the
seam.
Raise
presser
foot.
Flip
fabri
over.
Lower
presser
foot
and sew
over
the
seam
approximately
2
cm
(1/2”)
without
cutting
the
chain.
Sewing
very
heavy
fabrics
and
differeni
thicknesses
of
fabric:
This
machine
will
sew
through
very
thu
to
very
heavy
fabrics.
When
sewing
very
heavy
fabrics,
tighten
the
upper
knife
screw.
Note:
When
sewing
thin
fabrics,
loosen
the
upper
knife
screw
after sewing
on
heavy
fabrics.
(See
illustration).
14

The thread
tension should be adjusted
according to
fabric type and thread
size.
Examine
the
seam and make the
necessary
tension
adjustments.
Adjusting
thread
tension:
Set
all
thread
tension
dials
to “N”,
standard setting.
(See illustration
below).
Sew
a
test
sample
to be
sure
that
the
correct
tension
has
been
obtained.
(See
illustrations
on the
left).
Setting thread
tension:

—
—
—
—
/
t\
When the
thread
tension
is
turned
in
(+)
direction, the
tension
is
increased.
When
turned
in
(—)
direction,
it
is
decreased.
Incorrect
thread
tension:
The
left
needle
thread is
too
loose
(blue
thread
tension).
The
right
needle
thread
is too
tight
(green
thread
tension),
or
the
right
overedge
looper
thread
is
too
loose
(red
thread
tension).
The
right
needle thread
is
too
loose
(green
thread
tension),
or
the
right
overedge
looper
thread
is
too
tight
(red
thread
tension).
16

The
following
seams
can
be
sewn
with
this
machine:
1.
Four-thread
safety
stitch
seam
This seam
is
sewn
with
all
four
threads.
It
should
be
used
to
sew
light to
medium
weight fabrics.
Application:
Closing
seams,
sewing
sleeves
into
shirts
and blouses,
sewing
curtains
and
drapes,
etc.
2.
Two-thread
chainstitch
seam
Only the
left
needle
JL
x
1
and
the
left
chainstitch
looper
are threaded.
The
right
overedge
looper
is
disen
gaged
and
the
right
needle
removed
(see
pages
18,
19).
Application:
Seaming
materials.
By
sewing the two-thread
chainstitch
seam,
you
can
place the safety
stitch
at
any
distance
from the
edge
you
choose
to
give
you
a
virtually
unlimited
seam
width.
3.
Two-thread
overedge
seam
Only
the
right
needle
DB
x
1
(1738)
and
the
right
overedging
looper
are
threaded
for
this
seam.
The
left
needle
is
removed.
Application:
Finishing
all
types
of
seams.
17

Setting the
machine
for
double
chain-
stitch
Remove the
lint
box,
see
page
11.
Open
looper
cover.
Remove
knife
guard
(1)
from
the looper
cover.
Remove
right
needle.
Raising
the
upper
knife:
Turn
the
hand
wheel
counter-clockwise
to
set the
knife
in
the highest
position.
Push
the knife
holder
to
the
far
right
and turn
the
knob
clockwise
until
it
locks.
Disengaging
the right
overedge
looper:
Turn
the hand
wheel
counter-clockwise
until
the
needle
is
in
the
lowest
position.
Press
the looper
disengaging
lever
down.
Caution:
The
overedge
looper
is
now
disengaged
and should
no
longer
move
when
you turn
the
hand
wheel.
18