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Power supply for Nema34

Discussion in 'CNC Mills/Routers' started by Aleksejs, Jun 30, 2019.

  1. Aleksejs

    Aleksejs New

    May 13, 2019
    Likes Received:
    Hello there!

    AC source is 230V (Europe)
    I have a question regarding power supply and its power consumption
    My stepper motor drivers are for 50-70V dc 7A
    3 Nema34 rated at 6A max ( one for Y axis and 2 parralel for X axis)
    In my build i am going to use power supply 60Vdc 17A 1kW

    My question is can i use 16A breaker for my power supply?
    What current and power will all my motors consume? Is my power supply going to draw 18A current? (3x6 = 18)
  2. Kevon Ritter

    Kevon Ritter Journeyman

    Apr 30, 2015
    Likes Received:
    That just seems like you're playing with fire for no reason. In most situations, a machine is only using about 2/3 of the total rated current. Let's say you are two hours into a job and hit a patch of code that actually uses most of your three axi. The power supply dropping voltage is one thing, but tripping a breaker is another. You just killed your entire job because you left no overhead.

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