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    Brakes on Stepper Motors

    Duet Hardware and wiring
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    • C6D
      C6D last edited by

      Hi All,

      I realise this topic has been raised a couple of times before with various solutions being put on the table namely worm gears and firmware changes.

      What I would like to know is if anyone has had any success operating brakes on stepper motors without making firmware changes? I'm using the Duet 2 eco system with the DUEX 5 expansion board.

      I'm planning on driving two Nema 17 with friction brakes. These brakes require a always on 24V signal to disengage. The plan was to get the 24V through a Mosfet Board.

      Any help regarding this would be greatly appreciated.

      Regards,

      Andre

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      • DocTrucker
        DocTrucker last edited by DocTrucker

        Could use the PS_ON pin and ensure M80 is at the end of your config.g?

        If you did get a heater fault the steppers could be commanded to drive against the brakes.

        Alive: 1 Ormerodish machines. 1 Custom Cantilever. 3 P3Steel. 1 Ciclopish scanner. In build: 1 P3Steel. Controllers: 2 Duet 2 , 2 D0.6, 1 D0.8.5, 1 D3 v0.5, 1 RAMPS/DRV8825, 1 Uno/Scan Card.

        C6D 1 Reply Last reply Reply Quote 0
        • C6D
          C6D @DocTrucker last edited by

          @DocTrucker are you referring to what would happen if I did what you suggested in your striked through comment?

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          • DocTrucker
            DocTrucker last edited by

            Yeah, don't do what I suggested! 😄

            Alive: 1 Ormerodish machines. 1 Custom Cantilever. 3 P3Steel. 1 Ciclopish scanner. In build: 1 P3Steel. Controllers: 2 Duet 2 , 2 D0.6, 1 D0.8.5, 1 D3 v0.5, 1 RAMPS/DRV8825, 1 Uno/Scan Card.

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            • A Former User
              A Former User last edited by

              There is already an enable signal going to the motor drivers; this could be used for disengaging the brake as well i recon?

              You'll have to solder to get to the signals (for the duex you might get away with a splice on the 50pin ribbon)

              C6D 1 Reply Last reply Reply Quote 0
              • C6D
                C6D @Guest last edited by

                @bearer I'll try it and give feedback.

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                • A Former User
                  A Former User last edited by

                  Btw, just realized there is a common enable signal for all the drivers if that makes a difference.

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