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  1. #1
    Trefhi's Avatar
    Lives in Barcelona, Spain. Last Activity: 4 Weeks Ago Has been a member for 0-1 years. Has a total post count of 2.
    Hi!

    I got some closed loop nema 23 steppers (3x 3N and 1x2.2N), with drivers and I'm not 100% sure wich PSU choose.

    This ones:

    https://es.aliexpress.com/item/33056...584063c0ZzRVQU

    Drivers are rated Vdc 24V-80V. The seller told me they use 24/36V 360W for two motors but reading the forum seems like using the higher voltage is better.

    So I was thinking to buy 2x 70V 400W. This ones:

    https://es.aliexpress.com/item/10050...c006H6V4p&mp=1

    Any recomendations? Thanks!

  2. #2
    Quote Originally Posted by Trefhi View Post
    Hi!

    I got some closed loop nema 23 steppers (3x 3N and 1x2.2N), with drivers and I'm not 100% sure wich PSU choose.

    This ones:

    https://es.aliexpress.com/item/33056...584063c0ZzRVQU

    Drivers are rated Vdc 24V-80V. The seller told me they use 24/36V 360W for two motors but reading the forum seems like using the higher voltage is better.

    So I was thinking to buy 2x 70V 400W. This ones:

    https://es.aliexpress.com/item/10050...c006H6V4p&mp=1

    Any recomendations? Thanks!
    For 2 steppers I'd go 72V 500w per pair. But that's just me. Well, if it's only using 50%-70% it'll likely never fail on you :)

    I run 60V on a basic open loop but have a 350w on each. Been working for years on my 25 size mill.
    I've ordered a 60V 720w single unit now to save space in my new control box and I'm upping to a 72V 400w for my Z motor for an extra boost.

    The 60V 350w ones will prob move to my sieg x2 rebuild at a later date. There's 36v on that machine atm and it's crap!!!!.
    Last edited by dazp1976; 25-04-2021 at 11:45 PM.

  3. #3
    Quote Originally Posted by Trefhi View Post
    Hi!

    I got some closed loop nema 23 steppers (3x 3N and 1x2.2N), with drivers and I'm not 100% sure wich PSU choose.

    This ones:

    https://es.aliexpress.com/item/33056...584063c0ZzRVQU

    Drivers are rated Vdc 24V-80V. The seller told me they use 24/36V 360W for two motors but reading the forum seems like using the higher voltage is better.

    So I was thinking to buy 2x 70V 400W. This ones:

    https://es.aliexpress.com/item/10050...c006H6V4p&mp=1

    Any recomendations? Thanks!
    Personally I would use a toroidal with 3 caps and a rectifier this much better than a switch mode supply.

    25-25 secondary in series will give about 68v DC when rectified.

    Edit: 500 or 625Va would be more than enough for the toroidal.
    Last edited by Clive S; 26-04-2021 at 05:42 AM.
    ..Clive
    The more you know, The better you know, How little you know

  4. #4
    Quote Originally Posted by Clive S View Post
    Personally I would use a toroidal with 3 caps and a rectifier this much better than a switch mode supply.

    25-25 secondary in series will give about 68v DC when rectified.
    What Clive said.
    That's if you're confident and competent.
    I'm not so, otherwise I'd have everything on a 1kw 70v unit :(

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