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From what I can tell, the SD2209 is not a clone of or another name for the TMC2209, but is a board with a TMC2209 on it setup to be used as a drop-in replacement for other stepper drivers. See e.g. this SD2209 a drop-in replacement for Pololu style drivers:


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Each axis is fine using a different stepper size and/or quality. You will still need to tune their operating current and steps/mm for each of course. Make sure your motor mounts fit too. Where it might become challenging is if you wanted two different steppers on the SAME axis. As in, a NEMA17 + NEMA23 for a dual Z axis. I don't think this is what you intend ...


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