Posts made by Aelinon

@boelle:

@Aelinon:

Consider: Use Stallguard to perform bed levelling/compensation.

that would only work where the Z steppers are able to push the nozzle down

if the X ends rest on Z isolators there will be no resistance when the nozzle touches the bed, but maybe the load will lighten enough that you can say that you are at the bed

You have a valid point - in all fairness I admit that I was particularly focused on deltas, because, I design/build/use deltas.
This idea does seem to me to be a very similar concept to the accelerometers recently being used, without having to implement any new hardware. And pretty cool that Duet is the only board that I'm familiar with that could do it.

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Consider: Use Stallguard to perform bed levelling/compensation. GCode that sets lower current, slower moves, low Stallguard Threshold (SGT) and uses this to find the bed with the hotend by treating stall notification as trigger. Once complete, returns to normal current/speed/accel settings. Complications that may arise and require a lot of custom tuning per individual printer are outlined very well in section 4.1 of the datasheet: https://www.trinamic.com/fileadmin/assets/Products/ICs_Documents/TMC2660_datasheet.pdf.
Perhaps flag that allows SGT triggers for each driver to be displayed as they are triggered to assist in tuning the individual printer's motors?