Hi all. Duet 3 board is great, this is a design comment.
I have been messing with a 5ft x 5ft x 7ft build volume printer for 3 years.
It had a 8mm heated aluminum bed (too thin) that operated well but warped badly. I have since disconnected it.
I have had surprising success with using regular contact cement as an adhesive over duct tape on the aluminum bed, at room temperature.
This is just an observation for those hobbyists who can't spend thousands on a large heated bed.
I hope someone finds this useful.

I built a very large printer with a heated bed that warped ridiculously with heat. I eventually broke it trying to level it so I started printing on the cold surface.
Long story short, I discussed the issue with my wife, a quilter. She suggested a basting spray she uses for sticking fabric together.
It worked amazing!!!
Stayed sticky through multiple prints.

@phaedrux I ended up ordering a duet3 mainboard. The only issue I foresee is I need one extra low power stepper driver. Is there not a way to connect my old duex5?

@phaedrux question 1: during inital paneldue startup. Bed works fine but I get the error message.
2: Firmware 3.0. I am trying to learn one version before upgrading. I am finding it too confusing for my 64 year old brain
3: I believe so. I am unsure because literally I forget what I have done after walking out the shop door. Refer to answer to question 2.
4: I will post my config .g and the results of sending M122 and M98 P"config.g" shortly.
Here they are:
40af8efe-3dbd-4afb-9110-11ce04ceffcd-M122M98.txt

I am 2 years into building a very large printer with no experience in mechanical engineering or coding. It has been a challenge, but mostly fun

I have had intermittent wifi issues since install. It would constantly disconnect. After reading a seggestion in forums I realized I had created a "faraday cage" between my duet board and modem. A cheap wall plug wifi booster, closer and without metal obstructions between modem and booster, fixed the problem.

@Phaedrux Thank you for your assistance. I really appreciate it!
I did not include an expansion board M122 because I don't believe I have one.
Thank you again. Hopefully I won't be bothering you any time soon.

@deckingman working perfectly. Thank you.

I just replaced the micro SD that came with my board with a A2 rated 32gig and Wow what a difference. So so much faster!!!
Given that my printer is huge 1.5m x1.5m x 2.0m and the Gcode is huge it has to make a big difference.

@dc42 stand alone. My file uploads went from taking several minutes to being instantaneous. Huge difference in speed. It remains to be seen how this will influence prints but I am enthused by this change.

@Phaedrux I'm going to try switching it to out6 and see it that works.

After the BL Touch pin ways damaged and replaced, the sensor flashes red and says it is triggered. Probe self test retracts and deploys pin but then just flashes red.
Thanks in advance

Hey All. Little things on my very big homemade printer can cause my axis to shift slightly after putting down a layer. Is there a way to place a command in the config to get the machine to automatically pause and rehome X and y axis and restart?

@T3P3Tony I switched it to Out9 and it works fine. Go figure.

@Phaedrux I switched it to Out9 and it works fine. Go figure.

@Phaedrux I'm going to try switching it to out6 and see it that works.

@T3P3Tony
I have had the board for a couple of years and I think I have always had an issue will this fan control. I always assumed it was a coding issue, so I added it to the list Just getting around to trying to fix it now.

I have tried S0 and S1 but the fan is always on max. Out put 8 is using the same code but works perfectly.
Thanks in advance,
Dave
Board: Duet 3 MB6HC (MB6HC)
Firmware: RepRapFirmware for Duet 3 MB6HC 3.4.5
M950 F0 C"out7" Q500 ; create fan 0 on pin out7 and set its frequency
M106 P0 C"heatblock fan" S1 H-1

@o_lampe Good thought but no the first layer appears clean.

Any ideas as to why I am getting these gaps in my concentric infill?

@dc42 stand alone. My file uploads went from taking several minutes to being instantaneous. Huge difference in speed. It remains to be seen how this will influence prints but I am enthused by this change.