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I’m building 3d printer with nema 17 motor X4, No heated bed, Single extruder, Ramps 1.4, Arduino mega. For this printer 12 v Power supply with how much Amps. Does it require?

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Hi, I would suggest a 10A for a printer without heated bed, if the price difference between a 10A and 15A is too small, then buy a 15A, it will allow you to add the heated bed in the future.

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Thank you very much. ?