Pict.
36
-
Fan
error
The
nozzle
cooling
fan
is
made
by
Noctua
.
These
premium
fans
are
known
for
their
superb
quietness
and
exceptional
performance.
You
can
turn
off
the
monitoring
in
LCD
menu
under
Settings
->
Check
fans
for
example
if
you
replaced
one
of
the
fans
with
a
replacement
not
supporting
RPM
sensing.
12.1.3
Extruder
drive
gear
The
hobbed
drive
gear
on
the
extruder
motor
shaft
can
have
build-up
of
filament
shavings
in
the
grooves
and
cause
under-extrusion.
A
small
brass
brush
is
an
ideal
tool
to
clean
the
grooves,
but
a
regular
toothpick
will
do
the
job
as
well.
Check
and
clean
from
the
access
window
on
both
sides
of
the
extruder
assembly.
Clean
what
you
can,
then
rotate
the
gear
and
repeat.
Nothing
needs
to
be
disassembled.
Clean
when
you
see
signs
of
missing
plastic
in
the
objects,
e.g.
missing
lines
of
extrusion.
12.1.4
Electronics
It
is
good
practice
to
check
and
eventually
reconnect
the
electrical
connectors
on
the
mini
RAMBo
board.
Do
so
after
first
50
hours
of
printing
and
then
every
150-200
hours.
12.1.5
PEI
rejuvenation
PEI
can
lose
its
adhesive
powers
after
a
couple
hundred
hours.
Wipe
it
thoroughly
with
acetone
when
you
see
models
getting
loose
to
restore
the
adhesion.
12.2
surface
preparation
Print
surface
preparation
is
described
in
chapter.
12.3
Filament
sensor
The
optical
filament
sensor
detects
the
presence
of
filament
and
also
it’s
movement.
60
