Hello guys. I'm racking my brain with this subject and since I'm taking it seriously I'm trying to cover all of the possible challenges simulating and calculating it before taking this to real world on our lathe and eventually a cylindrical grinder.
Andy succesfully proved that eccentrics and other shapes can be made using LinuxCNC applying an offset to an axis based on the spindle position. I'm really curious about what kind of resolution the spindle encoder has to have. I'm guessing that as the size of an actual lobe increases, the more control points you have, the more accurate the shape will be. This leads me to the next question. As I apply an offset to let's say the X axis on a lathe via HAL. Will LinuxCNC try to reach that position at the maximum speed of that axis? If so, is there a way to not only fool the commanded position but also the commanded velocity? I'm guessing a way to solve this in an easy way would be to vary the spindle speed throughout the full turn to accomodate the rotary speed to the fixed speed of the linear axis, and that will require a servo spindle, but I'm just guessing. Also I think this is not going to be a problem If I have a low diameter lobe and a high resolution encoder, but I'm thinking that the ideal way of doing it would be not only to control the offset at a specific spindle position but also the speed the axis needs to reach that point. I would really be thankful if anyone can help me to clarify this, Andy I'm looking at you mostly :) Thanks as always for your help! -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
