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Thread: PSU Assistance

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  1. 04-08-2015 #7
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom.
    Jonathan
    Last Activity: 05-04-2020 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 3,571. Received thanks 325 times, giving thanks to others 8 times. Referred 1 members to the community.
    I'm currently a fan of transformers as they're easy to fish out of the university skip...but when the price is comparable a switch mode power supply is sensible. You can always add components if required to increase the peak rating.

    Quote Originally Posted by CNCStudent View Post
    Not so sure about 500va given its 250va per tapping (5amp) and the drives run at 4.2a hence if two axis are running off the same tapping at the same time they would draw worst case 8.2a, hence why I was edging toward 1000va (500 va per tapping or 10a rating at 50v)
    Be careful not to mix up motor phase current with DC-bus current - they are rarely the same.
    Last edited by Jonathan; 04-08-2015 at 12:54 PM.
    Old router build log here. New router build log here. Lathe build log here.
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