New Delta Odd Homing Issue

blt3dp

Hi, I've got a a Duet Ethernet 1.2 running RTOS 2.02 (non RC) and DWC 1.22.6

I'm having an odd issue with homing. When I first power it up, if I hit the home all button or send G28. It does not work as I expect.

I expect all 3 carriages would at the same time move towards the endstop, trigger, lower some, then slowly move toward the endstop, trigger again, then move down 5 mm.

It only moves the X and Y carriages towards the endstop, once they trigger, then it moves Z. Which can cause some issues depending on how far away they were in the first place.

Also if it does get to the point where it moves Z and it triggers the endstop, all it does is trigger once and move down. It does not slowly move back up and trigger again like the others do.

Because of this, when I do autocalibration, it says the endstop adjustment for Z is like 2 mm more than the others.

Here's my config.g
Removed

And my homedelta.g
0_1550523398113_homedelta.g

blt3dp

It's got to be something with the way the probe is configured.

If I comment out all the probe lines and change my M574 to:

M574 X2 Y2 Z2 S1

Homing works fine, but of course I don't have a probe then.

aidar

In your config.g Z endstop is missing. I am not very familiar with delta, but i belive you must have endstops on all towers high end.
https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareDeltaPrinter

aidar

@blt3dp said in New Delta Odd Homing Issue:

If I comment out all the probe lines and change my M574 to:
M574 X2 Y2 Z2 S1
Homing works fine, but of course I don't have a probe then.

You dont have to comment out all lines in probe section, just M574 line, then you still will have probe.

blt3dp

Yep, that was it

Previously I had

;Endstop configuration
M574 X2 Y2 S1

Probe configuration
M574 Z2 S2

Now I have

M574 X2 Y2 Z2 S1

And it's working as it should.