Power Supply Recommendation

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  • #5121
    3DMakerZone
    Participant

    I am building my first CNC using the DIY CNC Router plans and the 4-axis PRO kit with 305 oz stepper motors. Does anyone have a recommendation for an off the self power supply I can buy?

    #5158
    BrianV
    Keymaster

    Sorry for the tardy response. Power supply SIZE recommendations are listed in the build instructions:

    Stepper Power Supply
    The stepper power supply MUST be capable of providing 50% of the TOTAL current draw of the steppers. A 2.5A stepper will draw 5 Amps! For example: 4 steppers rated at 2.5A will draw a total of 20Amps. Adequate fusing must be used on both the AC and DC side.

    Personally (and for testing), I use a basic, unregulated, linear power supply. A large toroidal transformer, bridge rectifier, filter caps and fuses. See the FAQ Power Supplies for the schematic.

    Also, there are LOTS of cheap switch-mode 36V 10A supplies on eBay. I personally don’t like the use of switch mode supplies for huge inductive loads, but since I don’t hear/see lots of complaining about these supplies, so I can’t say “no”.

    Hope that helps.

    BrianV

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