Thread: Power Supplies

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  1. #1
    I bought a controller/motor/driver/2xPower supplies set from ebay last week.. it's still on its way but I have realised that the kit I chose didn't have the power supplies in. Annoying! I thought it was a bargain :) It's too late to cancel so I need to sort out the power supply.

    The kit I intended to get came with:

    • 4 pcs Nema 23 stepper motor with 425 oz.in 23HS9442
    • 4 pcs stepper motor driver DM542A, peak 4.2A, 128 micsteps, replacing M542
    • 2 pcs Power supply 350Watts (36VDC/9.7A)
    • 1 pc Breakout board & 1 pc Parallel cable


    Does anyone have any recommendation for what I should get? Just replace with the same or would I benefit from a higher powered unit - or 2 higher powered units even?

    Budget end of the spectrum by the way :)

  2. #2
    You could make your own powersupply. I am sure I saw the diagrams on here somewhere. 36V is a good place to start but you could push the Nema 23s to 48V if needed.

    see: http://www.mycncuk.com/threads/9333-...-Diagram-check
    https://emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  3. #3
    I'll be honest - building a power supply doesn't do it for me :) I'm just going to go for an off the shelf solution.

    Is there a good reason that 2 power supplies were part of the kit?

  4. #4
    yes, they are both 350W which would limit the current that the total of 4 motors would be able to draw at any given time.

    You could probably buy the same powersupplies that were in the kit locally too.
    https://emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  5. #5
    That was my suspicion but I thought a better quality higher rated PSU might have sufficed as opposed to 2xcheaper units

  6. #6
    OK from what I can gather I need around 11.5A from the power supply. I have a choice of 2x 350w 7.3A or 1 x 600w 12.5A.. What is my best option?

  7. #7
    Which option works out cheaper?
    https://emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  8. #8
    64 and 66 respectively

  9. #9
    2 times the 350w would be my choice then ;)
    https://emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  10. #10
    Cheers! some things can look too obvious when you don't know :)

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