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Rotary axis question (rotational)

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  • undefined
    tenaja
    last edited by tenaja 8 Jan 2021, 23:06

    What is the benefit of declaring an axis a rotational axis?

    Is there no positional limit? Are there other differences?

    Thanks!

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    • undefined
      Alex.cr
      last edited by 9 Jan 2021, 05:25

      Do not declare something as a rotary axis unless it is one. Try googling linear vs rotary axis.

      One is designed to move in a straight line, the other rotates about a fixed point.

      Voron2.4/Duet3 SBC+6HC+3HC+1LC+1HCL(x2) - Delta/Duet2 Wifi - CubePro/Duet2 Wifi+Duex5 - Laser/Duet3 Mini5+ - Cel Robox - U̶p̶3̶0̶0̶+/D̶u̶e̶t̶3̶ ̶6̶H̶C̶+̶LC1̶ - F̶T̶-̶5̶/̶D̶u̶e̶t̶2̶ ̶W̶i̶f̶i̶ - S̶o̶l̶i̶d̶o̶o̶d̶l̶e̶

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      • undefined
        dc42 administrators
        last edited by 9 Jan 2021, 08:07

        The main difference is that if any linear axis is moving, then rotary axes do not take part in the feed rate calculation.

        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

        undefined 1 Reply Last reply 9 Jan 2021, 13:46 Reply Quote 0
        • undefined
          tenaja @dc42
          last edited by 9 Jan 2021, 13:46

          @dc42 Thanks....but what does that mean, exactly? Does it mean a rotary axis will not limit the speed, or it follows the rate of the other axes to end at the same time, regardless of which axis would have been the limiting axis? Or does it mean it will go its own speed?

          I have a rotary axis on a project that started with an older firmware. I'm trying to decide if it's worth "converting" it to a rotary axis in the code. Will my code be affected?

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          • undefined
            tenaja
            last edited by 12 Jan 2021, 22:11

            @tenaja said in Rotary axis question (rotational):

            an

            DC, any chance you can help with that? Thank you.

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            • undefined
              Phaedrux Moderator
              last edited by 12 Jan 2021, 22:29

              It means the rotary axis is independent from the linear axis.

              @tenaja said in Rotary axis question (rotational):

              Does it mean a rotary axis will not limit the speed

              correct.

              Z-Bot CoreXY Build | Thingiverse Profile

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