The servo is a current drive with a +- 10 volt input. > As there is not much load on the drive so a +-0.4 volt will swing the motor > at full speed. >
Tuning with no load at all might be hard or impossible. Do you have the motors attached to the ballscrew/machine? Full speed at 0.4V command would mean you throw away a factor 20 of dynamic range. I'd suggest you do something to get full speed at closer to 8 or 9 V command - maybe lower the supply voltage to the drives, adjust the max current, or something. It sounds like you have two loops: one in the drive and one using linuxcnc. It's hard to say what is going wrong without knowing more about the system. What loop is the drive closing? with what feedback? What loop is linuxcnc closing? AW ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
