I'm adding external steppers (TMC2100) the manufacture has the Vref set top 1.8 in the config. if I set them to that VIA the pot on the driver I have a high pitched sound coming from either the steppers or the fan in the power supply. its hard to tell since they are close together (on top of a Delta) I'm going with the steppers. They move pretty good, but I'm worried I might be over driving them or something. the external boards are set to 32 steps like t was set for the board drivers.
Summary:high pitch sound from steppers, but they do move nothing in the troubleshooting quite fits right
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