Pfaff hobbylock 787 User manual

p
fr:
\
hobbylock
787
•
788
Instruction
manual

IMPORTANT
SAFETY
INSTRUCTIONS
-This
sewing
rrachine
is
designed
and manufactured
for
HOUSEHOLD
use
only.
When
using
an
electric
appliance,
basic
safety
precautions
should always
be
followed,
including
the
following:
Read
all
instructions
before
using
this sewing
machine.
D
AI\IG
ER
To
reduce
the
risk
of
electric
schock:
1.
The
sewing machine should never
be
left
unattended
when
plugged in.
Always
unplug
this
appliance
from
the
electric outlet
immediately after
using and
before
cleaning.
2.
Always
unplug
before
relamping.
Replace
bulb
with
same
type
rated 15 Watts.
3.
Do
not reach
for
a
sewing
machine
that
has
fallen
into
water.
Unplug immediately.
4.
Do
not
place
or
store
sewing
machine
where
it
can
fall
or
be
pulled into
a
tub
or
sink.
Do
not place
in
or
drop
into
water
or
other
liquid.
VV
To
reduce
the
risk
of
burns,
fire,
electric schock,
or
injury
to
persons:
1.
Do
not
allow
to be
used
as
a toy.
Close
attention
is
necessary
when
this
sewing
machine
is
used
by or
near
children.
2.
Use
this
sewing
machine
only
for
its
intended
use
as
described
in
this
manual.
Use
only
attachments
recommended
by
the manufacturer
as contained
in
this
manual.
3.
Never
operate
this
sewing
machine
if
it has
a
damaged
cord
or
plug,
if
it is
not
working
properly,
if
it has
been
dropped
or
damaged,
or
dropped into
water.
Return
the
appliance
to
the
nearest
authorized
dealer
or
service
center
for
exami
nation, repair,
electrical
or
mechanical
adjustment.
4.
Never
operate
the sewing
machine
with
any
air
openings
blocked.
Keep
ventilation.
openings
of
the
sewing machine
and
foot
controller
free
from
the
accumulation
of
lint,
dust,
and loose
cloth.
5.
Never
drop
or
insert
any
object
into
any opening.
6.
Do
not
use
outdoors.
7. Do
not
operate
where aerosol
(spray)
products are
being
used
or
where
oxygen
is
bein-g
administered.
-
8.
To
disconnect,
turn
all
controls
to
off
(“0”)
position,
then remove
plug
from
outlet.
9.
Never
operate
on
a
soft
surface
such
as a
bed
or
couáh where
the
air
openings
may be
blocked.
10. Do
not
unplug
by
pulling
on
cord.
To
unplug,
grasp
the plug,
not
the
cord.
11.
Keep
fingers
away
from
all
moving
parts.
Special care
is
required
around
the
sewing
machine
needle.
12.
Always
use
the
proper
needle
plate.
The
wrong
plate can cause the needle
to
break.
13.
Do
not
use
bent
or blunt
needles.
Use
needles
recommended
by
the
manufacturer
only.
14.
Do not
pull
or
push
fabric
while
stitching.
It may
deflect
the
needle
causing
it
to
break.
15.
Switch
the sewing machine
off
(“Os)
when
making
any
adjustments
in
the
needle
area,
such
as
threading
needle,
changing
needle,
threading
bobbin, or
changing
presser
foot,
etc.
16.
Always
unplug
sewing
machine
from
the
electrical
outlet
when removing covers,
lubricating,
or
when
making
any
other
user
servicing
adjustments
mentioned
in
the
instruction
manual.
17.
Hold
plug
when
rewinding
into
cord
reel.
Do
not
allow
plug
to
whip
when
re
winding.
SAVE
THESE INSTRUCTIONS

•
2.3
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11
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11
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12
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12
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13
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14
•
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14
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.-
14
•
..
15
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16
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17
•
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18
19
20 20
21,22
23 23 24 24 25
26,27
28 29 29 30 31
32
32 33 34—39 40—41
42
43
46 43—50 51
Contents
Controls
of
the
sewing
machine
Accessory
box
Electrical
connection
Master switch
and
sewing
light
Foot
control
Notes
on
safety
How
to
handle
the
thread
spool
stand
Opening
the
looper
cover
and the
swivel-type
work
support.
Threading
guide
wires
18 and
22
Threading
the
right
looper
Threading
the
left
looper
/
threading
slide
Threading the
left
and right
needle
Needle
threader
Thread
reel
change
on
threaded
machine
Inserting
the
lint
box
Seam
allowance
Sewing
test
Points
to
observe
during
sewing
Thread
cutter
Securing
the seam
Setting
the standard
thread tensions
Possibilities
requiring
thread
tension
corrections
3-thread
overecige
seam
Engaging and
disengaging
the
converter
(Hobbylock
788)
.
Thread
tension
adjustment
for
sewing
with
1
needle
and
2
threads
Thread
chart
Adjusting the
stitch length
Adjusting
the
differential feed
(Hobbylock
788)
-
.
Disengaging
the
upper
knife
Adjusting
the seam
width
Changing the
sewing
foot
Changing the
light
bulb
Cleaning
the
thread
tensions
Rolled
hem
with
3
threads
Rolled
hem
with
2
threads
Changing the
needles
Changing
the
knives
Changing
the
upper
knife
Changing
the
lower
knife
Upper
knife
arresting
Cleaning
the
knives
Oiling
the machine
Stitch
selection
table
Sewing
problems
and
their
removal
Accessories
Thread
spool
net/thread
unreeling
disc
Mounting
of
the Converter
Special
accessories
Specifications
/
contents
of
the cardboard
box
•
•
.
1

(0

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
1
0
Looper
cover
with
recess
11
Upper
knife
1
2
Swivel-type
work
support
1
3
Needle
plate
14
Sewing foot
1
5
Needle
holder
1
6
Sewing
foot
lifting
lever
1
7
Thread spool
holder
18
Color-coded
thread
guides
1
9
Telescopic
thread
guide
bar
20
Machine
socket
21
Master
switch
22
Rear
thread
guide
(4x)
23
Differential
feed
adjustment
knob
(Hobbylock
788)
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
Retaining
screw
of
lower
knife
35
Retaining
screw
of
upper
knife
36
Thread spool
centering
piece
37
Upper
knife
arresting
screw
38
Lamp
cover
39
Thread
cutter
40
Looper
threader
41
Converter
42
Needle
threader
43
Tweezers
29

Accessory
box
Swing
open
work support
1
2 and pull
out
accessory
box
24.
The
accessory
box
can
only
be
inserted
in
its
compartment
when held
as
shown
in
the
illustration
at
left.
The
guide groove
is
up
and
the
projection
of
the
box
faces
the machine.
Electrical
connection
Use
this
machine only
on
a
flat
surface
or
on
a
special
machine
table.
Connecting
foot
control
28: Insert plug
29
of
the
control
in
machine
socket
20.
Then
connect mains
plug
30
to
a
power source.
Caution:
When
the
machine
is
not
in
use,
always
switch
it
off
at
master
switch
21
and
disconnect
the
plug
from
the
power
source.
do
not
place
any
objects
on
the
foot
control.
4

Switching
the
machine
ON
and
OFF
Power
and
sewing light
together
are
switched
on
and
off
with
master switch
21.
Switching
on:
Press
switch.
Machine
and
sewing light
are
switched
on.
Switching
off:
Press
switch
again.
Machine
and
sewing
light
are
switched
off.
Foot
contro’
The
speed
of
the
Hobbylock
is
regula
ted
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
44
= Full speed
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
muzt
be
dis
connected
from
the power
source.
C)
The
maximum
approved
wattage
of
the
light
bulb
is
1 5
watt.
D)
The drive
belt
must
never be
adjusted
by
anyone but
an
authorized
Pfaff
agent.
5

e3-O
————
I
How to
handle
the
thread
spool
stand
Pull thread
spool
stand 1 as far
as
it
will
go
in the direction
indicated
by
the
arrow.
Fully extend
telescopic
thread
guide
\
bar
19. Slowly
turn
the two
upper tele
—
scopic
sections
until
you
hear their
detent balls
snap in
place.
After
use
fold
up
telescopic
thread
guide bar
19.
read spool
stand (with
or
machine.
6

1
Opening
and
closing
looper
cover
and
work support
Push
looper
cover
10
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
in
the
direction
indicated
by
the
arrow.
To
close the
work
support,
push
it
lightly
until
it
locks.
Behind
the
looper
cover converter
41
(Hobbylock
788)
is
illustrated
with
its
slide
settings
for the
respective stitch
type.
On
the
inside
of
the
looper
cover
the
individual
threading
paths
are
illustrated
in
colors.
lmportantl
While
the
ooøer
cover
or
work
support
s
open,
power
supply
to
the
machine
is
inrorrupted.
f1\
—‘
____
____
—
/
-D-
/—
‘-==
i’)
A
I
—
/_____________
—
Threading
of guide
wires
18
and
19
Place
thread
spools
on thread
spoo 1
stands.
The
machine
must
be
threaded
correctly.
First
pull
the
threads
through
guides
18
according
to
colors.
Then
lift
carrying
handle
2
and
place
the
thread
in rear
guides
22.
Set
the thread
tensi
ons
at
N
and
thread
the
machine
in
the
following
sequence:
1.
right
looper
(yellowl
2.
left
looper
(redl
3.
right
needle
(green)
4.
left
needle
(blue)
Push
carrying
handle
2
down
again.
7

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Threadng
the
left
looper
Thread guide
9
is
threaded
by
means
of
looper
threader
40.
1 The
mark
on
handwheel
9
must
be
aligned
with
the
mark
on
the
hou
sing.
2.
Tauten
the
thread
a
little.
3.
Push
the
slide
of
the
looper
threader
fully
to
the
left,
then
pull
lightly
on
the
thread
and
allow the
slide
to
return
slowly.
By
this
means
the
thread
is
placed
in
guide
9.
Note:
If
the
slide
can
not
be
moved
the
marks
on
the
hand
wheel
and
the
housing
are
not
correctly
aligned.
j
Thread
left
looper
32
(yellow
thread
path)
in
sequence
1
to 6.
From
thread
guide
6
pull
the
thread
through
looper
eye
7.
/
z/__w__J
1
Align
the
mark
on
handwheel
9
with
the
mark
on
the
housing.
Tauten
the
thread
a
little
and
place
it
in thread
guide
B
by
means
of
tweezers 43.
C

Threading
the right
needle
Threading
of
guide
wires
18 and
22
is
shown
on
page
7.
In the
left-hand
illustration
the threa
ding
path
is
shown
from
green
tension
1
up
to
right
needle
eye
6.
Thread
the
needle
from
the
front.
The
use
of
needle
threader
42
is
desc
ribed
on
the
next
page.
Threading
the
left
needle
Threading
of
guide
wires
18 and
22
is
shown
on
page
7.
In the
left-hand
illustration
the threa
ding path
is
shown
from
blue
tension
1
up to
left
needle
eye
6.
Thread
the
needle
from
the
front.
The
use
of
needle
threader
42 is
desc
ribed
on the
next page.
10

is
Needle
threader
Lower the sewing
foot by
means
of
lif
ting lever 16.
Turn
the
hand
wheel until right looper
31
is
positioned right
of
the needle
(see
top of page 18).
Place the thread
in slot A
of needle
threader 42
and
tauten
it
a
little, holding the needle
threader
a
little
turned to the front.
With the needle
located
between
the
two guide lugs B
move the needle
threader slowly
downwards
at
the rear
side
of the needle
until small hook
C
engages in
the needle eye.
Hold the
thread taut and place it in
hook D; it will
then automatically
be
placed
in hook
C,
too.
Pull the needle
threader to the rear, out
of
the needle eye,
and the thread will
be
pulled through
the
eye.
Pull the thread
completey through the
needle
eye.
Thread spool change
on threaded machine
Cut
the threads close to
the thread spool. Place new
thread spools on spool holders
1 7.
Tie
the
threads still in the machine
and the new threads to-gether.
Pull
the needle
threads out
of
the
needles.
Now pull
at
the thread ends until
the knots are about
1
5 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.
11

Inserting the lint box:
Insert the two tabs
of lint box
8
down
wards in the recess of
looper cover 10.
Then push
the bottom of the box
against the
machine.
For removal of the lint box, use the
revese order.
Seam allowance
If
the cutting is guided
along
below
mark N on
looper cover 10, a seam
allowance of 16 mm
must be taken
into
consideration
when cutting the
fabric.
After
threading the machine,
push
handle 2
down, and close
work
support
12 and looper
cover
1 0.
12

Sewing
test
After
threading,
a
sewing
test
should
be
made.
Raise
sewing
foot
lever
16,
as
shown
in
the
illustration.
Hold
the
thread
ends
with your
left
hand
while
turning
the
hand
wheel
with
your
right
hand
in
the
direction
indica
ted
by
the
arrow
on
the
wheel.
Hold
the
threads
taut
and
lay
them
back
under
sewing
foot
14.
Make
sure
the
threads
interlock
correctly
during
sewing
(thread
chain).
Insert
the
test
fabric up
to upper
knife
11
and
lower
sewing
foot
lever
1
6.
13

Points
to observe during sewing
Thread cutter
In
order
to be
able to use thread cutter
39
it is necessary to
sew
beyond
the
end of
the seam. Draw the resulting
thread chain
through the thread
cutter
from the rear (see illustration
below
left).
Securing the seam:
Knot the
thread chain. For knit fabrics,
a
crochet
needle can
be used to
pull
the
thread chain into the seam.
Or:
Sew about 5
cm
(2”)
beyond
the
end of
seam.
Turn the workpiece around and
sew
a
few stitches over the seam just
sewn without cutting
the thread chain.
Sew the
first stitches slowly. If the
machine has been
rethreaded, place
the
fabric under sewing
foot 14
and
push
it
up to
the needle before starting
to
sew.
Since the fabric is
fed automatically,
do
not
pull or push the fabric. Use your
hands
for guiding only.
14

Face
side
Setting the
standard
thread
tension
N
zijE.
Li
.:.•
;1
thread
Left
\
looper
thread
Right
Left
needle
thread
needle
thread
Reverse
side
Optimum
seam
appearance
depends
on
the
type
of
fabric
used,
on the
thread
size, and
on the
thread
tension
setting.
Set
the N
on the
thread
tension
dials
opposite
the
round
colored mark
on
thread
tension
cover
7 (see
illustration
below).
Make
the correct
adjustment
after
exami-nation
of
the interlocking
of
threads
(the
illustration
on the
left
shows
a correct
four-thread
overedge
seam).
Page
16
lists
examples
for correction
of
the
individual
thread
tensions.
Recommendation!
Allocation
of
the
individual
threads
in a
seam
to
their
respective looper-
and
needle
thread
tensions
will
be
easier
if,
as an
excercise.
you
thread
the tensi
ons
with
differently
colored
threads
(e.g.
thread
color
=
tension
color).
HI!
15

1.
The
right
looper
thread
C
is
too
tight
(red
thread
tension).
2.
The
left
looper thread
0
is
too loose
(yellow
thread
tension(.
3.
Both
tensions
must
be
corrected.
1.
The left
looper
thread
0
is
too
tight
(yellow
thread
tension).
2.
The
right
looper
thread
C
is
too
loose
(red
thread
tension).
3.
Both
tensions
must
be
corrected.
Possibilities
requiring thread
tension
corrections
When
the
thread tension
is
turned
in
(+)
direction,
the
tension
is
increased.
When
turned
in
(—(
direction
it
is
dec
reased.
The
left
needle
thread
A
is
too
loose
(blue
thread
tension).
The
right
needle
thread
B
is
too
loose
(green
thread tension).
16

i
3-thread
overedge
seam
Left
needle
Right
needle
UJL
ih
rn
Standard
seam
width
N
Standard
seam
width
N
--
57mm
3,5m
Max.
seam
width
7.2 mm
Max.
seam
width
5
mm
3-thread
overedge
seam:
Threading
of the
right and
left
looper
is
described
on
pages
8 and
9.
The
slide
of
converter
41
must
be
set
at its
right
position
B
(see
p.
18).
The
3-thread overedge
seam
is
sewn
with
two
looper
threads
and
one
needle
thread.
Seam
width
adjustments
at
adjustment
knob
26
(3
to 5
mm)
only refer
to the
right
needle.
When the
left needle
is
used,
the set
value
is
increased by
2.2
mm
(seam
width 5.2
to
7.2 mm).
17

Engaging
the converter
(HL
788)
For
the
Hobbylock
787
the
converter
is
available
as
a
special
accessory
part
(see p.
42
and
46).
Turn the
hand
wheel
until
right looper
31
is
positioned
right
of
the
needle.
For
sewing
with converter
41 the
right
looper
thread
must
be cut
off
and
pul
led
out
of
the
looper
eye.
All
seams
sewn
with converter
41
are
only
sewn
with left
looper
32
and
with
one
or
two
needle
threads.
The
left
looper
thread
placed
over
right
looper
31
must
be
pulled
over
the
point
of
the
right looper
in
the direction
of
the
arrow,
as
shown
in
the
left-hand
illustration.
A
+—.B
Push
the slide
of
converter
41
to
the
left
until
the
triangular
symbols
are
aligned
with
each
other.
As
you
do
so
the
point
of
the
&ide
must
engage
in
the eye
of
the
looper,
see
Fig. A.
Converter
engaged
=
position
A
Con
verter
disengages
=
position
B
Disengaging
the
converter
Turn
hand
wheel
9
slowly
until
the
left
looper
thread
drops
from
the
point
of
right
looper
31.
Disengage
the
conver
ter
in
this
position
(position
B).
For
threading
the
right
looper,
see p.
8.
18