If
filament
is
not
extruded
from
a
nozzle
(or
in
very
small
volume),
first
check
the
extruder
fan
is
working
properly
and
that
the
temperature
is
set
correctly
(PLA
210
°C;
ABS
255
°C,
HIPS
220
°C,
PET
240
°C).
Also
check
that
the
filament
was
correctly
loaded
into
the
extruder.
If
the
filament
pours
out
at
least
a
little,
check
the
direction.
If
it
swirls
and
goes
up
to
the
hotend
you
need
to
clean
the
nozzle
.
First
you
have
to
move
the
extruder
to
the
rightmost
position,
out
of
the
way
of
the
heatbed,
to
reach
the
nozzle
from
below.
Heat
the
nozzle
according
to
filament
you
want
to
from,
load
the
filament
and
put
a
bundled
acupuncture
needle
(0,3-0,35
mm)
into
the
nozzle
from
below
-
between
1
and
2
cm
deep.
Choose
Load
filament
option
from
the
LCD
menu
and
check
if
filament
is
extruded
properly.
Put
the
acupuncture
needle
into
the
nozzle
again
and
repeat
these
steps
a
few
times
more.
When
the
filament
is
extruded
properly,
the
nozzle
is
clear.
12.4
Replacing
/
changing
the
nozzle
Preheat
the
nozzle
(LCD
menu
->
Settings
->
Temperature
->
Nozzle)
and
set
the
temperature
to
at
least
200°C.
Heating
the
nozzle
is
crucial
for
removing
the
old
nozzle
and
putting
in
the
new
one.
1) Move
the
extruder
body
upwards
to
get
to
the
nozzle
end
(LCD
menu
->
Settings
->
Move
axis
->
Move
Z
->
Set
the
height
by
rotating
the
LCD
knob
and
then
confirm).
2) Unscrew
the
screw
on
fan
mouthpiece
and
the
two
screws
on
the
fan
and
remove
both
parts
(Pict.
30,
part
1)
.
3) Remove
the
two
front
screws
on
the
nozzle
fan
(Pict.
30,
part
2).
4) Unscrew
the
two
screw
holding
the
extruder
cover
(Pict.
30,
part
3)
.
Even
though
the
nozzle
itself
is
accessible
directly,
we
recommend
to
take
the
extruder
cover
to
get
access
to
the
heating
element.
5) Now
the
whole
nozzle
body
is
accessible
(Pict.
30,
part
4)
.
6) Hold
the
heating
element
with
a
spanner
(size
17)
and
unscrew
the
nozzle
(Pict.
30,
part
5)
.
Be
careful,
the
nozzle
is
still
hot!
When
the
new
nozzle
is
inserted,
tighten
it
while
the
nozzle
is
preheated.
While
tightening
do
not
forget
to
hold
the
heating
element
with
the
spanner.
Re-assemble
the
extruder,
insert
the
filament
and
you
are
ready
to
print.
Be
careful,
the
nozzle
is
hot
during
this
whole
process
and
can
cause
burns!
Be
careful
around
the
hotend
thermistor
leads,
you
can
break
them
easily.
Be
careful
and
don’t
apply
force
to
the
nozzle
or
heater
block,
you
can
bend
the
heatbreak
easily.
It
is
a
good
practice
to
run
6.3.9
First
layer
calibration
after
changing
the
nozzle!
51
Summary of Contents for i3 MK2S
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