Setting up my duet now and ran into a problem i wanted to share. I was at the point where i had finished setting up the individual steppers on my delta and was ready to do my first home all. after flipping high for low on the end-stops i finally got it to home but after the second approach the effector would drop about 150mm and move forward to the outer limit of the bed. i searched the forums and found no answers, as most of the posts were about not being able to home at all. after a lot of trial and error i found out it was the M574 command in config.g that was the problem. It should have read "M574 X2 Y2 Z2 S1", but instead I had "M574 X2 Y2 S1". I don't know if the typo was the configurator's fault or mine for not checking something off during its use, but adding in the Z2 fixed the problem.

Just wanted to share my experience in case it helps another.

Thank you. Would a 10 amp in line fuse be acceptable? if any of the components like the heater failed closed or shorted, would the fuse pop before the full current damaged any of the ground ports? I know you said the heater ports can only take around 6, and I assume the others less.

OK, so a few days later i can say it definitely worked. Now im curious about exploring this further. I don't want to start another thread so ill just dump any new ideas into this one.

Since all the devices are apparently switched on the low side, I'm considering two more options.

Option 1 - connect both Vin terminals from the two hot end wires into one line, giving me a 10 amp rated +12v to the hot end. from this I would then simply run a ground wire back for each device. Does anyone know if there would be any load issues from running the two Vin lines as one bus line? I would be running back grounds for a single heater, cooling fan, part fan, and LED ring. obviously if i had a dual extrusion machine i would ground the second heater to its appropriate port, assuming i could still keep the single positive line?

Option 2 - skip the middle man and bring in a +12v line directly from the power supply. I would still send back grounds to their appropriate connectors on the duet. I guess i would need to fuse the positive line? Or would i still have protection from the onboard fuses?

The main goal of this is to reduce and simplify wiring to the effector, as the yellowjacket board on the hotend was designed to take all its Vin from the Rambo heater port positive, and switch all the devices to ground at the board. Since it apears i can do the same here I want to run 3 large wires (positive, Heater 1, Heater 2) and up to seven small wires (fans, leds, thermistor) In the form of two separate multi core coiled cables so they stay tidy and self retract.

i guess I'm just hoping someone will jump in and tell me no before i do something stupid.

I appreciate any advice you guys have.

Setting up my duet now and ran into a problem i wanted to share. I was at the point where i had finished setting up the individual steppers on my delta and was ready to do my first home all. after flipping high for low on the end-stops i finally got it to home but after the second approach the effector would drop about 150mm and move forward to the outer limit of the bed. i searched the forums and found no answers, as most of the posts were about not being able to home at all. after a lot of trial and error i found out it was the M574 command in config.g that was the problem. It should have read "M574 X2 Y2 Z2 S1", but instead I had "M574 X2 Y2 S1". I don't know if the typo was the configurator's fault or mine for not checking something off during its use, but adding in the Z2 fixed the problem.

Just wanted to share my experience in case it helps another.

Just got my Duet Wifi and had a quick wiring question. I'm going to build a new printer, but i want to install the duet in my RMaxV2 and use it to print those parts. right now I have the yellow jacket board on my hotend and it pulls in a single positive 12v and sends back a ground wire for heater, fan, led etc. Can I run these to the duet as i did my rambo, allowing all the power to draw from the heater positive and running the grounds to their respective pins on the duet?