On 01/27/2013 03:24 AM, Marshland Engineering wrote: > I'm running Colpey servo drives but I cannot get them tuned in with > LinuxCNC. > > 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. > > The manual for the drive says to supply a stepped input to it and tune the > feedback pot till the motor steps nicely without overshoot. Done this with a > 1 HZ signal generator. > > Now when I'm runing it with LinucCNC, I get a lot of overshoot and > eventually, if the step is big enougth, a following error. > > I've tried P, I and D values varying from .05 to 5 and output voltages from > 1-10 and none seem to make any real improvement. > > I'm stuck. > > Thanks Wallace > > > ------------------------------------------------------------------------------ > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users
Are you in Torque Mode? refer to http://www.copleycontrols.com/motion/pdf/412.pdf there is no tacho feedback for torque mode there is no 'step test' for torque mode ( and step means an instant velocity command change form 0 to maximum used , like 0 to 8V ) no frequency is needed , the test uses one edge and a storage scope. doesnt matter at all if you are in torque mode, set by the s2 switch from outside the case """ TORQUE MODE For transconductance: ( Iout / Vref ) = Ipeak / 10V: 1) Set S2 ON 2) Set Ref Gain fully CW 3) Set Loop Gain fully CCW. 4) To increase gain, turn Loop Gain CW. To decrease gain, turn Ref Gain CCW. """ in this mode torque is purely a linear function of Vref ( Vcmd in Fanuc-ese ) tomp ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
