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Thread: Pwer Supply

  1. #1
    Member Gallchobhair's Avatar
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    Default Pwer Supply

    I am looking at some stepper motors to replace the ones I have. The new steppers are rated
    at 3.5 amps per phase 48V.What size power supply would I need to run 4 of these. I know
    48V but what amps do I need. Do I take 3.5 an multiply buy 4 . If I do that I would need a
    48V 14 amp power supply. Is that correct. I can find power supplies at 48V but none at 14 amps
    for a reasonable cost.

    Thank You
    Don

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    The time has come the woodworker said to speak of many things. 0f routers and Wood , chips and paints and stains and CNC and other things.


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    Default Re: Pwer Supply

    Where'd the 48V come from? Most steppers would be rated 2V-5V.

    You only need about 2/3 the rated current, so 2/3 of 14, or about 9 amps.

    Gerry

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    Member Gallchobhair's Avatar
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    Default Re: Pwer Supply

    http://www.automationtechnologiesinc...23h2100-35-4bm
    This is the motor I am looking at. I have a meanwell SE-450-36 power supply.
    http://www.automationtechnologiesinc...23h2100-35-4bm

    Don

    The time has come the woodworker said to speak of many things. 0f routers and Wood , chips and paints and stains and CNC and other things.


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    Default Re: Pwer Supply

    Those are 4.2V motors, and ideally need a 72-80V power supply, for best performance.
    What drives are you using?

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


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    Member Gallchobhair's Avatar
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    The time has come the woodworker said to speak of many things. 0f routers and Wood , chips and paints and stains and CNC and other things.


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    Default Re: Pwer Supply

    What motors are you currently using? With those drives, and 48V, you're only going to get 50% of the performance that those 570oz motors are capable of, which may not be any better than what you have.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


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    Member Gallchobhair's Avatar
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    Default Re: Pwer Supply

    The probotix 280oz yellow motors. Thsi one PROBOTIX 280 OzIn 8-Wire Stepper Motor

    If you would be so kind as to list what BOB Driver and Power Supply you would recomend . I will look to see what is in my reach.
    I am retired and want to boost the performance if I can . The machine is cncrouterparts 2440 not pro.

    The time has come the woodworker said to speak of many things. 0f routers and Wood , chips and paints and stains and CNC and other things.


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    Default Re: Pwer Supply

    Maybe try these with your drives and a 48V power supply.
    http://www.automationtechnologiesinc...l23h2100-35-4a
    Maybe buy one for the gantry and see what difference you see?

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


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    Member Gallchobhair's Avatar
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    Default Re: Pwer Supply

    Ok thank I will give that one a try. I will let you know
    I do like your UNCNC 2017 screenset. I only need to make the text in the box bigger
    and a different color so my old eay can see it LOL

    The time has come the woodworker said to speak of many things. 0f routers and Wood , chips and paints and stains and CNC and other things.


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    Default Re: Pwer Supply

    Why not run 2 power supplies . One on the Y axis and the other dedicated to the X and Z axis . Problem solved.
    Its not like there a lot of money
    Switching Power Supply 500W 48V 10.4A for CNC Router 115V/230V S-500-48

    personaly I prefer having more headroom than needed , as opposed to being worried about it



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    Member Gallchobhair's Avatar
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    Default Re: Pwer Supply

    I think I would run Z on the new stepper and X and Y on the power supply I have.
    I just need to see if the BOB I have can do this.

    Don

    The time has come the woodworker said to speak of many things. 0f routers and Wood , chips and paints and stains and CNC and other things.


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    Default Re: Pwer Supply

    Maybe the steppers are not to blame.

    Are you running your 280 half or full coil?

    If you run full, maybe try half-coil would give better results. It gives less torque but way more speed. Or if you are half coil and need more torque, maybe try full coil.

    What is the problem with your current steppers? Speed? Torque? Both?



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    Member Gallchobhair's Avatar
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    Default Re: Pwer Supply

    Quote Originally Posted by Biggs427 View Post
    Maybe the steppers are not to blame.

    Are you running your 280 half or full coil?

    If you run full, maybe try half-coil would give better results. It gives less torque but way more speed. Or if you are half coil and need more torque, maybe try full coil.

    What is the problem with your current steppers? Speed? Torque? Both?
    The X and Y are good. The Z is very heavy and I have had times when it would loose steps because it could not move
    up and down. I had a time when the Z could not hold itself up.. I fixed this with springs. I had read on this forum that
    people used springs and gas struts on the Z to help. I just decided I would fix Z. I have an 8 wire motor wired as a 4
    wire.I am no pro just a hobbyist and retired looking for all the help I can get. Thank you for the reply.

    Don

    The time has come the woodworker said to speak of many things. 0f routers and Wood , chips and paints and stains and CNC and other things.


  14. #14
    Member Biggs427's Avatar
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    Default Re: Pwer Supply

    Which configuration out of these three are you using?
    Pwer Supply-probotix280wire-jpg



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    Member Gallchobhair's Avatar
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    Default Re: Pwer Supply

    Wired as a 4 wire. Like the 3rd picture.

    Don

    The time has come the woodworker said to speak of many things. 0f routers and Wood , chips and paints and stains and CNC and other things.


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