Short to ground alarm on the duet board
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What is the exact error message? Your video doesn't show it.
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
My Apoligies, i sent the video link and not the picture link, below is the picture link
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The good news is that it seems to be just the one driver, if you can remap to the others then user R-1 in M569 for driver 3 to silence the error.
If the motor on driver 3 never had worked I'd go over the wiring before trying it on another driver.
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@dc42 also a heads up, i tried swapping the ports in the config.g as i had seen someone do on the duet3d forum but still the alarm persists, strangely i can home the machine, pick and drop tools, fans work too, and i can heat the tools and the bed, hopefully you have some solution to this
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@bearer where can i M569 this, in the config.g , just asking cause i am new to the duet, but have expeirence with other printer boards, also i tried to swap the ports from 3/4/5/6 to 7/4/5/6 that didnt get the alarm silent as well
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@rajilpahuja said in Short to ground alarm on the duet board:
@bearer where can i M569 this, in the config.g , just asking cause i am new to the duet, but have expeirence with other printer boards, also i tried to swap the ports from 3/4/5/6 to 7/4/5/6 that didnt get the alarm silent as well
Yes, in config.g you will already have a line
M569 P3and something else, addR-1to that line to make the error go away (the driver will still be defective, but disabled)The motor on driver 3 worked fine on another driver after you swapped?
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@bearer i didnt try that as yet but, i can try that and see , firstly i think want the alarm gone, cause those keep coming
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@rajilpahuja said in Short to ground alarm on the duet board:
i can try that and see
make sure to check the wiring first so you don't risk damaging another driver if there was a problem with the wiring.
the errors will go away with adding R-1 to disable driver 3.
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@bearer strangely the wiring came from E3D so i am perplexed how they would have messed it up
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@bearer the line there says M569 P3 S0, so i need to add like this M569 P3 S0 -R1 ?
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@rajilpahuja said in Short to ground alarm on the duet board:
M569 P3 S0 -R1
M569 P3 S0 R-1not the value for R is -1
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@bearer ok will try this to see if error goes
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@rajilpahuja said in Short to ground alarm on the duet board:
@bearer strangely the wiring came from E3D so i am perplexed how they would have messed it up
they probably didn't but doesn't hurt to double check.
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@bearer i think i should have but generally i never had issues with their stuff, so was relaxed on the checking part, but i guess need to check even if its from the most dependable companies
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There are many reports here about people getting a 'short to ground' errors. Are these really shorts to ground or something else? If the latter, consider to change the error message?
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Good news is that after adding the R-1 the alarm went away, now i must inspect all the wires to be very sure before plugging them in :), but hope i get a replacement
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@zapta my guess is sometimes you can get faulty boards or drivers, electronics are after all not a 100% all the time, or it could be a wiring thing from the @E3D ppl, anyways i will have to investigate this, and hopefully i get a replacement
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@rajilpahuja, something is probably wrong ;-), but considering that the steppers connectors don't even include a ground line, I wouldn't be surprised if most fo the 'short to ground' alarms we see on these forums mean something else.
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@zapta said in Short to ground alarm on the duet board:
I wouldn't be surprised if most fo the 'short to ground' alarms we see on these forums mean something else.
i think most of them are sort of accurate, its just the short to ground is internal to the failed driver; at least after the fact.
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@rajilpahuja said in Short to ground alarm on the duet board:
@bearer i think i should have but generally i never had issues with their stuff, so was relaxed on the checking part, but i guess need to check even if its from the most dependable companies
Unfortunately we do see a few infant mortality failures of the stepper driver chips, so it's probably a chip failure. But please check the wiring in case a couple of pins have been swapped over. There should be low resistance between pins 1 and 2 of the motor connector, low resistance between pins 3 and 4, but high resistance between 1 or 2 and 3 or 4.
Either way, assuming you bought both the Duet and the wiring loom from E3D, you are entitled to have your Duet replaced or repaired under warranty.
