@phaedrux Im sorry I have been busy. But I working on a few things on it. Its been acting really weird. I got a few things I want to test before I go any further. Its possible it might be a bad wire going to the bed. But it wasn't working at all and now it works and suddenly stop working again. So i need to check a few things on the board and crimps to make sure I go though all the normal things. But I did check the fuses they seem fine, the debug light is working when its working. I need to check it when it stops working again. But this is the error I get when it stops working. Its almost instantly. Like its not even trying to turn the bed on. I watched the temps and they don't even raise a little. Like I said need to go though a few things first. Its also a 24 volt silicone bed put on a aluminum bed.

Error: Heater 0 fault: temperature rising too slowly: expected 0.73°C/sec measured 0.00°C/sec

My Am8 has a Duet 3 board that has been running fine for just under 12 months, this morning I went to start a print like normal. The printer instantly went into a fault on the heat bed side. I have checked all my wires, checked the fuses. All my wires are clean and not burnt and don't see anything broken that I can see physically. But something isn't working right or something is blown because it doesn't even heat up and it just instantly goes to fault. I contacted Filastruder about warranty since its under the 12 months. I was told to open a request for help first. So far everything else seems to be working. Except the heat bed. My extruder is heating up and fans seem to be working, the toolboard is working so far.

I got it fixed so the M997 worked great. Not sure what it actually did so if you can tell me so I know for next time. But when I was trying to figure out the heightmap issue I tried putting a mesh.g file in the files. So that was causing the mesh from from working. So deleted the file and works fine now. Thank you for the help. Seems to working fine now.

@chrishamm This is what is says in my system page. Not sure if this is what your after. Also I did try to run that command you said. It give a update display popup. Then it went away. Not sure if that fix the issue or not. But will try here in a few. That seems to fix the error. But now I can get it to run a G29 or anything from the menu on the compensation and calibration menu.

Board: Duet 3 MB6HC (MB6HC)
DSF Version: 3.4-b6
Firmware: RepRapFirmware for Duet 3 MB6HC 3.4.0beta6 (2021-11-06)

Im getting this error after updating my Pi 4 though the sudo update etc.. But Im not to sure what I need to do to fix this one. I have read though all the documents on the G29 commands. There's nothing about change in the command. So not sure why I'm getting this error. I need to get this fixed so I can use the mesh like i'm use to. I use the G29 S1 in my Homeall.g and also in my macro for my start gcode. I have the heightmap.cvs is in my main directory but not sure if it needs to be moved or needs to be in other places now.

error: g29: cannot use height map on local sd card when sbc interface is used

@dc42 Yea I got it fixed. I got the two Wire on the internal pin on the cord swapped around. Been kinda working on this one on and off. Because my feet have been getting swollen alot so I can work on it alot. So i been trying to do what I can. I do a little here and there. I finally got it right and it worked right. I had to get the main board updated which was a pain because it was outdated and wouldn't update though sbc. So i had reset it and try to run the update on bosse on my laptop which still would see it. Finally got the pi to run bosse. Then i was able to run the updates on the tool board and everything. Also is the only way to use a runout sensor is on the toolboard that using the extruder. Is there going to be a update to allow you to run the runout sensor to the duet 3 board. I really don't need to know how much filament is going out. I just need to know when it runs out and stops the board etc.. The one Im using is the bigtree tech so its not small and would really fit good on my carriage.

sorry dc I got the other duet 3 figured out. soldered wrong wire.. must of been really tired. Also the fan rpm line works on my other duet so.. It must be either the wiring going to the fan. I also have a connection that could be bad or bad crimp. So i need to check those. I know the line in the config is good. Because it works on my other duet.

@dc42 Ok I tried to removed the Q500 and didn't make any difference going to try the other thing you suggested but I got to make some prints first. Im working on my other Duet 3 and got the new tool board. I made a comment asking if you should connect the two outer wires on the 4 wire harness. When you connect the onboard resistor. Im not getting any response from the board in the dashboard right now. So not sure whats going on. Using the same cable I did for my other board and it worked fine. So its not the cable. I guess I could try to touch up the solder spot to make sure. But Im not getting thing from the board and the red light is blinking fast.

@dc42 No that was first thing I tried. But I will try that again see if it helps or not. I even tried to add the ! which only made it come on when it wasnt supposed and go off when I wanted it on. That was just to invert so not helpful. Not sure what else I could do. Could try to redo the wire.

@dc42 Im running the last version on the tool board and latest firmware on the board. I updated the tool board last week.