RRF 3.2 (possibly) related scare

garyd9

Last night, I upgraded my Duet3 board (standalone), PanelDue firmware, and DWC all to the currently released 3.2 (from 3.1.1). Afterwards, I ran new heater calibrations, and then left everything alone for the night.

This afternoon, I wanted to start a print, so set the bed and tool heaters as appropriate to let things warm up (because I wanted to run a new mesh calibration before printing.) After several minutes, I noticed that the tool heater wasn't heating up, so went to the printer and tapped the tool icon on the paneldue. Then the paneldue got stuck on "Changing tool" (which is always amusing when I only have a single tool.)

So, I reset the PanelDue, but that didn't seem to fix anything. Another reset of the panel due, and suddenly the Duet3 board starting making popping noises. I immediately killed power on my power supply and turned it back on... (apparently too soon.) Still getting popping and nothing is working.

Killed power again, disconnecting the actual power cord this time (which I probably should have done originally because the bed heater uses AC mains via a SSR.) I waited for everything to cool down so I could remove my build plate and examine the duet board (3d printer + popping -> usually means giving my credit card number to filastruder.)

No damage was observed, and both fuses were intact. I put everything back together and everything just worked. Printer heated up, did a mesh compensation, loaded filament and started printing.

I still don't know what happened or why. My only guess is that something didn't quite clear properly when the board reset after the firmware change. (Even when disconnecting power, it usually takes several seconds before all the duet LED's turn completely off.)

Note for next time: after a firmware update, don't depend on DWC to reset the board. Physically walk to the printer and disconnect the power cord, AND wait for all the LED's to go completely off before reconnecting power.

Phaedrux

I wonder what the popping was.

dc42

@Phaedrux said in RRF 3.2 (possibly) related scare:

I wonder what the popping was.

Same here. A popping with no damage could possibly have been the power supply starting up, then cutting out because of overload, then repeating. If it's a small PSU (because it is not powering the bed heater) then a hot end heater short might cause that without blowing the 15A fuse.

amjm22

How long does it take to update to ver 3.2
mine is still updating after 30 minutes.

Please advise

Thanks

dc42

@amjm22 said in RRF 3.2 (possibly) related scare:

How long does it take to update to ver 3.2
mine is still updating after 30 minutes.

Please advise

Thanks

In standalone mode, it only takes a minute or two. If DWC thinks it is still updating:

Refresh the DWC browser window.
If that doesn't fix it, reboot the Duet.

Then check the firmware version on the Duet to see whether the update succeeded.

matt3o

@garyd9 said in RRF 3.2 (possibly) related scare:

Note for next time: after a firmware update, don't depend on DWC to reset the board. Physically walk to the printer and disconnect the power cord, AND wait for all the LED's to go completely off before reconnecting power.

I noticed that too, sometimes for certain changes to really take effect you have to turn the printer down. Wait the capacitors to discharge and try again.

PS: glad your board is safe!

amjm22

This post is deleted!

garyd9

@Phaedrux said in RRF 3.2 (possibly) related scare:

I wonder what the popping was.

@dc42 said in RRF 3.2 (possibly) related scare:

Same here. A popping with no damage could possibly have been the power supply starting up, then cutting out because of overload, then repeating. If it's a small PSU (because it is not powering the bed heater) then a hot end heater short might cause that without blowing the 15A fuse.

The PSU is actually overpowered (~500W) for the job is currently has. Originally, it was powering a 250W 24 bed heater as well as everything else. (It's a good meanwell PSU.)

I'm also extremely curious what the popping was, but I have no intention of trying to repeat it. I feel like I got lucky with no apparent damage, and I really don't want to test that luck.

From what I can remember, the popping noises weren't loud and very well could have been the PSU turning on/off. It was 5-6 pops over 2-3 seconds. To be completely honest, when it happened, my only concern was "kill power" and any curiosity came much later.

Since then, everything seems to have worked fine. I converted the duet3 to use a SBC, calibrated, printed multi-hour prints, etc.