Initial Config Query

[jay_s_uk]

@900turbo looks like the SSR is feeding into the relay on the right on the DIN rail? If so, whats activating that?

[900turbo]

@deckingman I do not think I could as the wiring loom is a series of shielded lines with screw end terminals so how I would measure the resistance at the heater I am unsure on. This is 220-240v UK

[900turbo]

@jay_s_uk I'm not sure the PSU turns on and simply runs power through them. I believe they're there as a failsafe to protect the system from a surge?

[jay_s_uk]

@900turbo if you don't know what they're doing I really think you should get someone qualified involved

[deckingman]

@900turbo Can you tell us a little more about the machine itself?. I get the impression that this is one that you are converting. Is that correct?

[900turbo]

@deckingman Yes I am , Its a Builder Extreme 2000 from 2017. It originally had dual extruders but just didn't perform all that well. Upgrading it with the duet products and hemera xs would hopefully give a very reliable albeit single extruder large format printer that could be accessed wirelessly. The following components are new Hemera xs , duet tool board 1lC ,Duet MB6XD , Panel Due 5i yet to be installed ( just want to get it printing first!) as well as a BL touch and a raspberry pi 4. I contacted builder to see if i could have wiring diagrams and the specs of all the components. However they wouldn't release anything despite the printer no longer being produced after 2018.

[deckingman]

@900turbo Do you happen to know if the bed heater actually worked before you started the Duet modifications?

From what I have read of this thread, it seems that any configuration issues that you may have had, have been resolved. In which case, the fault must lie elsewhere. I'm afraid there are no easy solutions if the original manufacturer can't or won't help. It could be that the heater itself is faulty, or it could be that SSR isn't outputting the necessary mains voltage, or it be that one or more of the relays or fail safe devices has failed, or possibly some other reason. Somehow or other, you need to ascertain if the correct voltage is being applied to the heater, and if not, then you need to identify the reason for it.

I'm not familiar with that machine but if it was me and getting at the wiring was as difficult as you say, then I'd be tempted to run new wires. Initially, I'd connect the heater directly to mains via a switch to see if it actually heated when power was applied. If that was the case, then I'd run the live from the SSR ad check again. But it all means cutting into the existing looms and great care needs to be taken.

[900turbo]

@deckingman The company I work for has 2 other identical machines both of which bed heaters do In fact work so I was debating swapping one of those in. The few config issues I had have been resolved bar the steppers not working at all but then again that may be a Relay related Issue. If I swap in a different heater there is at least a possibility of finding out if it is just a faulty heater. I agree the SSR or the other Relays may have issues. I'm not a electrician so its something that most likely needs to be professionally looked at. I guess there aren't many people running 24v and 240v in one printer. Anything powered of the Duet MB eg extruder fans and a end stop has worked perfectly I ran new wires for the tool board ( 24v and Can ). The way the loom works means it wouldn't be easy to run a switch in line to the heater in the bed. The bed loom itself is 3 sections connected with something similar to this https://www.amazon.co.uk/Waterproof-Electrical-Cable-Connector-Depth/dp/B06XS5WNKM/ref=asc_df_B06XS5WNKM?tag=bingshoppinga-21&linkCode=df0&hvadid=80539283534604&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=&hvtargid=pla-4584138858708446&psc=1
bit long winded but just wanted to try explain things a bit more.
Thank You for all the help and advice.

[deckingman]

@900turbo Well actually, there are quite a lot of us that run mains heaters with everything else being 24V. Swapping the heater sound like a good idea. Best of luck.

[900turbo]

@deckingman I swapped the bed out and nothing happened , started going over every single bit of wiring I will keep it short but basically there's a emergency stop switch on the case and one of the wires was not on all that well. Reconnected it then tried to heat the bed and it heated straight up. I still cannot move my any of my axis but the steppers LEDs now come on so i assume Its just an issue with my g code.
Major relief anyway as I thought there was a far more serious issue with a broken SSR or Relays.