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Re: Unusual stepper ratings - vref settings for new Melzi

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If you have different chip like a4988 then probably documentation is old or something, so you should also check what sense resistors you have, as these are in that relation between Ipk and Vref. The math above was with Rs=0.11 because thats what the same page mentioned. If you have different sense resistors (Rs) then you need to know because if changes the math between Ipk and Vref. Its for the best to know which vref gives what ipk in correct terms.

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