@jay_s_uk Yep you are very right, have just uploaded the later firmware 3.4.0 and it worked, many thanks for your help.

@jay_s_uk Yeah i am trialing the revo hotend with the upgraded smart efficator board (a lot more accurate and less prone to the vibration issues when bed levelling) and using a fixed mounted hemera extruder not the flying spring mounts, seems to be more stable and prints faster.

@eranglr Would be beneficial to see what you have built and what you use it for, perhaps then people could suggest alternate paths for you to follow or help investigate.

Sounds like you are after variable speed control ? on the fly ?

@Manrhpg1 Do you mean Ivan Miranda ?
which printer model did you follow, and what files did you download from his website.

Duets need to have the end switches to be homed before any other movements are normally recognised, you can get around this by M commands used in the console area of DWC control panel.

You can if you wish contact me directly and we can have a video chat and you can show me what you have got, I would be happy to try and help you and advise accordingly.

Where are you based in the world and we can arrange a meet on WhatsApp.

Contact me on WhatsApp Shaun Richards

@zecreton How are the AXIS homed ?, you have no end stops wired to the motherboard unless you are using the override g-code command in the console, you need to show us the start-up DWC panel Dashboard after booting that verify and show all the end stops have been triggered and are homed properly, as before it will allow manual movement of the motors these have to be triggered. Without this its very difficult to ascertain what the problem is and how to help you further, Unless anyone else has an ideas.

@agmeadows have you double checked the power supply feed and or the power supply output, where is the printer situated ?.
power spikes are another source of electrical interference that could be effecting the boards as a fluctuating input or ground can trip the boards to reset.

@jay_s_uk Yeah i am trialing the revo hotend with the upgraded smart efficator board (a lot more accurate and less prone to the vibration issues when bed levelling) and using a fixed mounted hemera extruder not the flying spring mounts, seems to be more stable and prints faster.

@jay_s_uk How are you getting on with your predator, I revamped mine with a rail conversion along with a meastro board and smart efficator made a hell of a difference.

@jay_s_uk Yeah i think so, but now worried as my other prototype are all on the maestro boards and 2 failures means i will have to probably move them all to duet 3 boards.

@jay_s_uk Had to upgrade to the Mini 5+ as my maestro board keeps wiping the sd cards ? and making them unreadable.

So took all my settings with it, so scraching head to sort 3 axis homing and other issues etc, talk about having a bad day. lol

@jay_s_uk Yep you are very right, have just uploaded the later firmware 3.4.0 and it worked, many thanks for your help.

@jay_s_uk Duet web control 3.4.0, FIRMWARE_NAME: RepRapFirmware for Duet 3 Mini 5+ FIRMWARE_VERSION: 3.2.2 ELECTRONICS: Duet 3 Mini5plus Ethernet FIRMWARE_DATE: 2021-02-11