Power Supply for Mill Controller

Posted: 2011/01/09 in CNC conversion

To supply power to the controller and stepper motors a pretty hefty power supply is required.  Many people opt for a standard old school non-regulated power supply, but I opted to go with something that would provide plenty of power along with regulation and thermal protection.

Taking all variables into account I decided on a switching power supply that produces 48Vdc @ 350Watts (7.4A with air cooling) with an efficiency rate of 88%+.

I found this power supply at Digikey model: FXA350048A.  It has a remote ON/OFF, power sense, power good indicators and thermal protection.

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