Re: Characterizing NEMA17 stepper motor/driver micro-stepping accuracy

Howard Dutton

Looking closely the BIGTREE S42A is a different creature vs. the MKS units.

It has usb.
It has more advanced AS5047D encoder chip (read this.)
It has the proper 100uF power supply cap.
Unknown about pull-ups on the signal lines but layout in that PCB region seems similar to the MKS 42B and not like the MKS 42A.

$38 from Aliexpress.

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