which also heats the wire with high current instead of an arc.
The printer is actually a FDM 3D printer built from an old microwave oven transformer and some other not special parts, which prints with welding wire instead of plastic filament. The only difference to a normal plastic FDM printer is, that the heat (around 1450°C) is created by high current flowing trough thin wire instead of plastic filament melting in a heated nozzle.
Things I could get to work:
- Creating low voltage/ high current with a microwave oven transformer and controlling its power output with a Phase Fired Controller.
- Attaching the circuit to a 3D printer.
- Melting welding wire with high current.
- Partially successful printing with welding wire.
- I could not get it to work reliable, yet.
- Wire got stuck in the nozzle.
- Printed part got loose from the buildplate.
- Printed lines did not fuse together.
Maybe this project can help someone with getting started with his own metal printing project :)
The printer is also suitable for welding/heating small metal parts.