inductive end stop intermittently triggered

dwak

@Phaedrux
that sounds like a logical possibility, the cables for the inductive sensors are shielded, but there is a short pigtail connecting them to 24v and gnd that is not shielded, I'll try to find a shielded cable to replace that pigtail or a ferrite and give it another go.

Phaedrux

@dwak said in inductive end stop intermittently triggered:

@oliof

not sure which screen you are referring to but I have clicked through all the tabs and am not seeing that on any of the pages even with the A axis manually triggered. I am content with the add on for now as long as its not causing a problem.

It's the main dashboard page where the X Y Z position is shown. When an endstop triggers the background of the X Y Z changes color.

dwak

@Phaedrux

does not change color for me

Phaedrux

Can you check your firmware and DWC versions?

dwak

@Phaedrux

Electronics
Diagnostics
Product Short Name Version
Duet 3 MB6XD MB6XD 3.5.2
Duet Software Framework DSF 3.5.2
Duet Web Control DWC 3.5.2

dwak

@dwak
added a shielded cable to power the endstops, no change
changed power supply out just as a poke in the dark, no change

dwak

@dwak
I noticed in the video that the z probe indicator alternates between 1000 and 0, not sure what exactly this number indicates but I assume that this is indicitive of the same problemRecording 2024-07-08 071616.mp4

dwak

update:
first the history.......when i started to get this duet set up I purchased an "identical" inductive sensor so i could mock up my machine before I committed to the change over. in the mock up the sensor worked perfectly so i proceeded with the install.

I just disconnected my z end stop and connected the new test sensor in its place, and it functioned properly. its not installed on the machine just hanging loose.

now I guess I need to figure out what that's telling me.

i guess as a next step i will replace one of the existing sensors with the new one and see what I get.
the cable runs on this machine are pretty long and i want to think that I could be getting some EMI, but the cables are shielded and they did work with the previous mach 3 controller, and the indicator lights on the sensors are fuctioning as expected ( led turns on when it approaches a metal object ) so I'm a little stumped. need a diode? why is the Z probe flashing in the dwc? (z probe is just a 3v supplied brass pad the tool touches off on)

any other suggestions would be appreciated.

thank you all for your time and expertise

Phaedrux

@dwak said in inductive end stop intermittently triggered:

z probe indicator alternates between 1000 and 0

The value of 0 to 1000 indicates the trigger status of the probe. So it's picking something up.

dwak

update:

i grounded the shielding on the offending cables and now I only have the issue with the y axis, so I have ordered some ferrites to see if i can eliminate the remaining noise.

dwak

Well got the endstops working on my own.
for anybody having similar issues,
I grounded the shielding on all the endstop and z probe cables and after ordering a trifield meter to test for efi, I moved the duet and pi to a more shielded location with some metal between them and the stepper motor transformers.

hope this helps someone in the future.
an aluminum, case for the duet would probably be a good idea,

Wonder if a 3d printed case from some ferromagnetic fillament would work for shielding.

the duet seems to be more sensitive to noise than my old controller was