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L6470 FS_SPD does not switch properly

Question asked by jakacki.peter on Mar 26, 2012
Latest reply on Jul 17, 2012 by tapero.charles
There seems to be an error in the datasheet concerning FS_SPD. For starters the maximum value is h3FF and not hFF as stated. But if I am running in 128 microstep mode and the FS_SPD threshold is crossed it does not actually switch to full-step mode, it looks more like an in-between microstep mode. I have confirmed this on the scope, it's not the same as running the motor in full-step mode.  BTW, I have managed to run the NEMA34 at up to 3400RPM.

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