Thoughts on this homing system? I think that Lulzbot uses a similar system.

3D Printing
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1

Thoughts on this homing system? I think that Lulzbot uses a similar system.

I want a simple autoleveling process without an inductive sensor, or endstop, etc. I am doing so to decrease the size of the print head as it needs to be compact.

I want to connect a wire to the hotend possibly between the tip and the heater block, and then another on the metal bed that I have. The probing could occur after heating the nozzle and then the printer raises the bed up slowly to when the nozzle hits the bed, it completes the circuit. Is this a viable system? The homing speed would be super slow to prevent crashing.

2

“Is this a viable system?” - absolutely. That’s how I mill circuit boards. pcb-gcode is a ULP for Eagle that generates gcode to mill a board. It has an auto-level addon. The blank board is grounded, and the probe (z-home) is clipped to the end mill. A grid pattern probes the board, coming in slow enough to stop on 1 step, generating a relief map that modifies the subsequent Z values while milling. (https://www.youtube.com/watch?v=WfQTS4RDP-g)

3

A lot of 3D printers are using this method.

4

As long as you keep the hotend’s tip squeaky clean, it’s going to work.