12.7
Printing
problems
12.7.1
Layers
break
and
split
when
printing
from
ABS
material
ABS
material
has
a
higher
thermal
expansion
than
other
materials
.
We
suggest
other
materials
like
PET,
HIPS
or
PLA
when
you
larger
models
.
12.7.2
Models
contain
either
too
much
or
not
enough
of
the
filament
You
can
manage
the
filament
flow
during
the
.
Use
the
LCD-knob
and
choose
Tune
-
Flow
-
xx%
where
you
can
adjust
the
filament
flow
.
Pronterface
users
can
enter
the
value
M221
Sxx
into
the
command
line.
When
you
change
the
filament
flow,
the
next
will
use
the
same
settings
unless
you
change
it
again
in
the
menu,
or
reset
the
printer,
or
unplug
it
from
the
power
source.
12
.8
Problems
with
finished
models
12.8.1
Model
breaks
and/or
is
easily
damaged
This
is
a
typical
feature
of
larger
models
printed
from
ABS.
If
you
have
set
the
temperature
properly
,
the
printer
is
away
from
drafts
and
object
design
is
right,
the
printed
object
should
not
break.
The
easiest
way
to
avoid
breaking,
or
overall
model
fragility,
is
to
choose
a
different
material
.
The
strongest
are
PET,
HIPS
and
PLA;
while
PLA
has
low
heat
resistance,
PET
is
the
firmest
and
has
the
lowest
thermal
expansion.
When
parts
break
and
there
is
no
spare
time
to
reprint
the
model
you
can
use
super
glue
or
any
other
glue
for
plastics
for
temporary
fix
:).
12.9
Updating
printer
firmware
A
firmware
update
is
a
simple
process
which
is
done
via
the
USB
cable
and
a
computer.
With
the
driver
installation
a
program
called
FirmwareUpdater
V2
is
installed
on
the
computer.
The
latest
firmware
can
be
found
on
http://www.prusa3d.com/drivers/
where
you
can
find
the
latest
guide
on
which
firmware
to
choose
and
detailed
instructions
for
the
process.
The
printer
will
reset
automatically
right
before
the
update
and
after
the
update
is
finished.
First
Layer
Calibration
is
required
after
the
firmware
update,
see
chapter
.
66