I should add that i need a total of about 335W:

• My new bed heater is rated at 200w

• The stepper motors require about 90W

• My extruder is rated at 30W

• I have 3 fans, and according to the "Choosing the power supply" guide, i'm allowing about 3W per fan.

• And finally, 2W for the Duet Wifi 2.

As Veti said above, the two CPU connectors on the PSU are possibly rated at 75W each. If I were to use all 4 power wires from these, wouldn't I still need 185W of power? At that point, that would be a lot of wires going into the Duet, so it confuses / concerces me. Would that be correct?

If that is the case, how can I go about finding the required power? I'm unsure how much power each wire provides.

@veti Do you have a suggestion on how I should wire this now? If i need a little more than 300w for the heated bed, hot end, etc.. how do people get away with just wiring up half of one of the CPU plugs?

Hello!

I've decided to upgrade to an ATX PSU, since my last PSU was a bit sketchy. I have watched some videos on youtube, showing how some people have wired their ATX's. I've also looked at the "Duet 0.8.5 Wiring ATX Power Supply" thread on the forums, but before I go through with it, I wanted to clear some things up.

I bought an EVGA 500W ATX PSU. This power supply has two "CPU" plugs. They are each square shaped plugs with a total of 4 wires (two yellow and two black). On this thread https://forum.duet3d.com/topic/1570/duet-0-8-5-wiring-atx-power-supply it is reccomended to put as many of the power wires into the provided ferrule. I was able to fit 2 of the yellow wires in total into the ferrule, which will go into the + power input on the Duet.

Question one, will this be enough current for everything?

Question two, I'm not sure what I should wire into the - power input on the Duet. Since I used the two power wires from the square connector, should I use both of the negative wires that were also on that square connector? Or just one? Or a different wire entirely?

Also, (thank you for your patience) I am replaceing my heated bed to a more powerful one, do I need to change anything in the Gcode? Or do I just need to retune the heater?

I appriciate your help, Thank you.

This worked out! Thank you very much.

This was the link to the PID tuning that the E3D setup referred me to. https://matterhackers.dozuki.com/Guide/PID+Tuning/6

Hello,

Recently, I decided to buy a Duet Wifi 2. I'm excited to get it up and running!

So far, I've successfully completed all of the wiring. Now, I'm going to the fine tuning of everything. I started tuning my hot end and bed, following the guide "Tuning the heater temperature control", but I'm running into an issue. I should mention that this is the first time I've messed around with G-code for my printer, since with my last setup, I never had to. I was able to run auto-tuning and got results for both heaters.

I went into the G-Code console and typed:

M303 H1 S205 ; AUTO TUNE HEATER 1, DEFAULT PWM, 205C TARGET OR MAXIMUM TEMPERATURE
M303 ; REPORT THE AUTO-TUNE STATUS OR LAST RESULT

The auto-tune finished, so to get the results, I typed:

M307 H1

And got this back:

M307 H1 A361.1 C123.4 D4.2 V12.5 B0

And to "save" it, my understanding was to type "M500" which I get this back:

M500
Warning: No M501 command was executed in config.g

I tried again with H0 which is the heated bed, and I got the same result. Am I doing this correctly? I also just installed a genuine E3D V6, and followed this setup guide https://www.matterhackers.com/articles/how-to-assemble-an-e3d-v6-all-metal-hotend. Towards the end, it says that you should do PID tuning. should I ignore this and only proceed with the "Tuning the heater temperature control" from Duet?

I appriciate any help, Thanks!