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    M915 Cool-Step strategy

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    • Ethelred
      Ethelred last edited by

      I'm interested in trying to reduce extruder stepper heating by invoking the M915 Tnnn cool-step parameter. The steppers are NEMA14 pancake style with 5.0 mh x 7.0 ohm phase parameters. They operate in a low rpm regime. I have been unable to identify what the "T" value vs. current relationship is. A 16 bit integer "T" range is pretty broad. Any clues?

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      • dc42
        dc42 administrators last edited by

        See section 5 in the TMC2660 datasheet at https://www.trinamic.com/fileadmin/assets/Products/ICs_Documents/TMC2660_datasheet.pdf. The M122 report includes the highest and lowest SG register values since M122 was last run, to help you find the correct coolstep setting.

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