Close

New Parts and more Testing

A project log for Wire 3D Printer

A 3D printer for printing with welding wire

dominik-meffertDominik Meffert 03/18/2020 at 20:450 Comments

The resistor plate got removed and a small fuse box was placed on its location, containing a 16A breaker for the whole printer, a 4A breaker for the work current and a contactor for triggering the filament runout function if the 4A breaker trips. The ramps board got also placed in a box to protect it from sparks and the phase-fired controller and pwm module got moved on its old location.

I did also some (unsuccessful) testing

I tested with different intensity, extrusion multiplier, layer hight and printing speed, but no success.

Maybe it could be a problem with oxidation what prevent the layers from fusing together.

Ordered 0.9mm flux core wire for more testing.

Update:

I tested it again with a 0.9mm nozzle and 0.6mm wire and it seems like the larger nozzle is an improvement. With the 0.6mm nozzle the wire got stuck in the nozzle when the heat reached the nozzle, but with the 0.9mm nozzle there is enough space to prevent that.

I still think oxidation is the problem because the "printed object" consist of many small brittle pieces of wire which are not fused together. Sometimes it seems like the melting stops because the wire lost its conductivity which could be a sign of an oxid layer covering the wire. After scratching over the buildplate or printed object the melting starts again.


Discussions