https://forge.codesys.com/forge/talk/Motion/thread/fd6159f759/2020-02-27T18:33:56.930000ZRecent posts to Running and A-axis smoothly at constant velocity2020-02-27T18:33:56.930000Z2020-02-27T18:33:56.930000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.combfa73ea6a70ec18810854b8fcf44246132e1dd4d

<div class="markdown_content"><p>Hi,</p> <p>If the a-axis is a spindle, then it could alternativeley be controlled using an m-function.</p> <p>If not, that is if the exact profile of the a-axis is given in the G-code, then the spline axis A (G-Code word A) could be used. In this case, the slope of A between G-Code elements should be set using the U-word.</p> <p>BR<br/> Edwin</p></div>

2020-02-27T18:33:53.789000Z2020-02-27T18:33:53.789000Zrbragasonhttps://forge.codesys.com/u/rbragason/https://forge.codesys.com8db730dce6984e40f1e11bd5c16449a46f9906d1

<div class="markdown_content"><p>I am currently working on an application that is running a xyz gantry and need to add an a-axis rotating around the x-axis. I have written g-code that moves the tool in xyz and rotates the a-axis (actually I am using the u-axis as it is linear while the actual a-axis is splined). I am having problems running the revolutions around the a-axis smoothly at a constant velocity. The only way I have found to control the rotation on the a-axis is to change the roational position with a certain interval and then the motor controlling the axis is always accelerating/decelerating causing vibrations. Anyone know of a better solution to control the a-axis rotation smoothly with constant velocity ?</p> <p>Best regards</p></div>