control circuit.
The build chamber sensor is installed at the
elevator assembly and measures the air
temperature inside the build chamber. Its
measurements influence the control of the
heating resistors inside the
heating elements
.
The extrusion temperature is measured directly
at the
heating cartridge
by an integrated
thermocouple.
Thermistors of the print bed (1) and the build
chamber (2).
A limit switch is installed at every filament inlet of the filament feed unit
(see
below
).
Filament supply
No. Description
1 Feed unit
2 Filament spool carrier
3 Filament spool (2.3 kg)
4 Limit switch
5 Filament inlet with dust wiping sponge
The HT500 is designed for printing filament
strands of a diameter of 2.85 mm with a
tolerance of ±0.1 mm. More information about
filament and materials can be found in the
material section
and the
print preparation
section
of the
Knowledgebase
.
Two separate strands can be fed from the
outside to the extruder head. One filament spool
can be positioned on each spool carrier; a stop
collar prevents them from falling down due to
their rotation.
The end of the filament strand is manually
inserted into the inlet of the feed unit and led
through hoses to the two
extruder nozzles
. At
the inlet the filament is put through a sponge
that wipes dust off the strand to keep the
material unsoiled before reaching the nozzle.
A limit switch registers the end of the filament
strand when the spool is empty. The print
process then is interrupted and the lack of
material is signaled on the
touchscreen
. The
printing process can be resumed after
refilling
Filament supply
