Prusa i3 Hephestos Printing Handbook - page 33
10.6 Printing problems
10.6.1 ABS models tear up from the glass when printing
The most often reason for this issue is too low temperature of the
heatbed
. If you
a
larger object you need to raise the temperature to 105115 °C. The larger the area and the
object height, the greater the temperature has to be. Also check the
heatbed
is
calibrated
and the glass is prepared
properly
as described in chapter
10.6.2 Layers break and split when printing from ABS material
ABS
material
has a higher thermal expansion than other
materials
. We suggest other
materials
as PET, HIPS or PLA when you
larger
models
.
10.6.3 Models move the glass during the print
Glass is not fastened to the bed
properly
. Use more binder clips a
the object again.
10.6.4 Models contain either too much or not enough of the filament
You can manage the
filament
flow
during the
. Use the LCDknob 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
next
will use the same
settings
unless you
change it again in menu or you reset the
printer
or unplug it from the power source.
10.7 Problems with finished models
10.7.1 Model breaks and/or is easily destructed
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 the choice of a
different
material
. The strongest are PET, HIPS and PLA while PLA has low heat resistance
and PET is the firmest and has the lowest thermal expansion.
33