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    External 5V Stepper Driver

    Duet Hardware and wiring
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    • tomlj
      tomlj last edited by

      Hi All,

      I need to drive several external stepper drivers (http://www.longs-motor.com/stepper-motor-driver-dm860a.html) which require 5V differential inputs. I know the Duex provides 5V, but is it possible to take the differential signals straight from pins on this board or does it only have motor connections? I have tried running the drivers from the 3.3V straight from the expansion header and they struggle a bit, most likely because of the fairly long wires between the board and drivers.

      Any help much appreciated,

      Tom.

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      • dc42
        dc42 administrators last edited by

        The expansion header outputs are 3.3V and don't provide enough current for some types of stepper drivers. The DueX provides 5V servo outputs only.

        We have a separate expansion header breakout board for connecting external stepper drivers, see https://www.duet3d.com/DuetAddons/Expansion_Breakout.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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