Power Supply Amperage requirements with Duet

I am trying to build a new printer using a laptop style power supply and a Duet 0.6 control board.

If I use a standard E3D lite nozzle, 0.8 amp motor for extruder, and 3 0.5 amp motors for movements and without heated bed, what are my power supply amp requirements for a 12 volt design? how about a 24v design?

Thanks.

E3d heater for the lite 6 is 30w heater. 2.5 amps
Motors 1x.8, 3x.5=2.3 amps
Other electronic needs= 1 amp
6 amp 12v supply would probably be sufficent.

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Prusa i3 Rework - Ramps 1.4 - E3d Lite6 - Full Graphic LCD Controller

Stepper current is not same as PSU current.
PSU current is much lower, like factor 4-5 because the stepper drivers chop the current.
A 12V5A is suitable but I recommend a bigger one for longevity and safety. 24V is possible with matching heater-element and fans.
-Olaf

You should allow 30W for the E3D, up to 7W for each Nema 17 motor, 2W per fan, 2W for the elecrronics, and 3W if you decide to add a PanelDue. Total about 68W. So I suggest a 80W or greater PSU.

If you choose a laptop PSU, these are normally 19V. You can get 19V fans and cartridge heaters from RepRapPro, however 24V components should work. If you use a 24V 40W heater at 19V then it will produce 25W.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

The most common sizes for 24v power supplies seem to be 3A/70W, 3.75A/90W and 5A/120W. Here is a list of the power supplies:

Amazon 24V Power Supplies

I like to order from Amazon because if it doesn't work, the return policy is good.

I have a 70W universal power supply already, so I will try that first.

The 24V 5A supplies are a good price, so I suggest one of those. It will give you enough extra power for dual extrusion if you choose that route in future.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

OpenBuilds sells a 24V 20A supply for $50 and they have good service also.

You might like to consider buying a larger capacity power supply, in case you decide to fit a heatbed in the future (they're very useful). Add another 150W to the total if you do (heatbeds don't take quite that much, but it's always nice to have some reserve).

I have some extra parts hanging around from my CoreXY build, so I am thinking to build an extremely small Delta. I have 3 extra 300mm slides, so I am thinking a Delta aprox. 300mm high with a build area of about 100mm diameter or so. This will probably be used only with PLA without a heated bed.

It will be too small to include a normal power supply inside the main structure, so a small external power adapter is desired. I am hoping to make it very portable so a smaller weight for the power supply is an advantage. Since I already have a 70W universal power supply that can be set at 24V (actual current tested at 24.2V) I am going to use that for initial testing.

I plan to insulate the hot end VERY heavily for safety (might be demo'ed around children) so I suspect that I can use a low watt 24V heater block. Is 25W the lowest watt 24V heater????

Quote
patrickrio
I plan to insulate the hot end VERY heavily for safety (might be demo'ed around children) so I suspect that I can use a low watt 24V heater block. Is 25W the lowest watt 24V heater????

I believe that's the lowest readily-available 24V heater. However, you could always turn your universal PSU down to a lower voltage if you want less heater power (power varies with square of voltage). The fans will run a little slower, but that probably won't matter.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].