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  1. #1

    New 400x400x300 Printer

    1p.jpg2p.jpg3p.jpg4p.jpg

    Hi
    Just finished building my new printer.
    Its seams ok when testing and adjusting single axels, but when working all together it starts to fai some random motor,
    I'm using a total of 8 nema motors:
    4 on Z axel
    2 on y axel
    1 on x axel
    1 for extruder
    Heated bed uses 220v with a SSR
    Extruder uses a separeted 12v power supy wtih a SSR

    I'm using a 12V 20A power suply, but for the sinthoms it seams that i'm low on power.

    Can i get your feedback?

  2. #2
    Super Moderator curious aardvark's Avatar
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    well given that my 350mm heatpad will drawer 27 amps.
    As you'v got a 400mm x 400 plate. I'd say yes, not enough power.

    Also nema 17 moptors draw around 1.7 amps. So 8x1.7 is only 13.6
    (reads post again) is the heat pad attached directly to the mains or via the main psu ?

    Have a look at led lighting power supplies.
    I got a 600watt 50 amp one for 15 :-)

    Same units but much cheaper if they think you're fitting led lighting rather than building a 3d printer

  3. #3
    Super Moderator Roxy's Avatar
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    Also... with 4 motors on the Z-Axis, how are you driving them? Most stepper motor driver chips can't even power a single motor at full power. With 4 of them the Z-Axis would be very weak if all powered by the same chip.

  4. #4
    Quote Originally Posted by Roxy View Post
    Also... with 4 motors on the Z-Axis, how are you driving them? Most stepper motor driver chips can't even power a single motor at full power. With 4 of them the Z-Axis would be very weak if all powered by the same chip.
    I have made a conected two DRV8825 to the normal zport on the board and another two to e3 port (made a a pin to pin conections)

  5. #5
    Changed power supply with 50A, and it worked fine until Rumba stopped talking with pc

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