Some hazards are design related and cannot be avoided by mere constructive measures. To avoid
injuries it is necessary that the operator is aware of such situations and takes adequate care. It is the
owners responsibility to ensure that every user of the 3D Printer is informed about risks and
preventions and that the safety precautions are observed. Access to this manual must be provided at
all times.
The safety advice given in the following is meant to protect the operator of the HT500.
Electrical safety
The HT500 is operated with 110 to 230 V (DC). Touching current-carrying parts can be life-
threatening and cause severe injuries.
Only connect the 3D Printer in accordance with the specifications given in the
data sheet
.
Works on the electrical equipment of the HT500 and on the power supply system may only be
carried out by skilled electricians.
Always disconnect the 3D Printer from the power supply by switching the main switch off and
removing the mains plug from the socket before carrying out maintenance, repair or cleaning.
Check the condition of cables and isolations at regular intervals and replace damaged parts
immediately.
Do not setup and operate the 3D Printer in a humid environment.
Hot surfaces
Outer surfaces of the HT500 are adequately isolated and do not exceed temperatures of +40°C
(104°F). They are safe to the touch at any time.
Inside the build chamber, the heating elements generate the necessary ambient temperature for
warp-free printing.
Depending on the processed material, surfaces inside the build chamber can reach temperatures
up to +70°C (158°F).
The print table is heated separately, also to minimize warpage. It can reach temperatures up to
130°C (266°F).
The extruder nozzles are heated to melt the filament strands and may reach temperatures of
500°C (932°F).
Touching heated components may lead to grade 1 burning injuries, in case of the nozzles of grade 2
of limited size.
To avoid burning injuries:
Do not open the build chamber during or immediately after completion of a print job.
Always switch off the preheating and wait until the print bed temperature indicated on the
touchscreen has dropped below 50°C (122°F) before removing the print bed. This is also to
avoid stress cracks due to sudden temperature drop.
Some tasks require handling at operating temperature (e.g. changing the nozzle tip). Wear
adequate protective gloves when handling hot components.
Observe the procedures and waiting times stated in this manual.
