Outstanding Igor! Glad to hear you got it all tweaked now and running fine. Yup, these guys know their stuff.
Mark On 09/15/2010 01:11 AM, Igor Chudov wrote: > OK, great thanks to all. Tonight was a great evening. > > First I tried to change velocity control loop (tachometer mode) on the > bothersome Y amplifier to current (torque) control . > > Then things went well very fast and I was able to tune the Y axis near > perfectly with FF1 and FF2. The f-error is not within about 0.0002" or > so. > > NO MORE jacking around, no more vibration, Y stops immediately without > any buzzing, moves smoothly etc. I was able to up the max acceleration > too. > > Then I went on to Z, which bothered me too as were all axes, just less > than Y. Current mode. The trick to get Z working right was to set > BIAS, because Z is subject to gravity. Again, under 0.0002" f-error. > Both when steadily moving, as well as under acceleration. BIAS, FF1 > and FF2 were my big friends. > > After that, X was the last sweet target. Bye bye tachometer feedback, > welcome current loop. After just 2-3 minutes, with better FF1 and FF2 > I get f-error under 0.0002". Also increased max acceleration, which > will no doubt improve small work performance and truetype-tracer > times. > > I now have a sweet quiet little Bridgeport Interact mill that does not > act like it is PMSing 30 days a month. 90 IPM on X and Y (I limited > myself to 60 IPM on Z for safety). Quick to home and quiet. > > That double velocity loop, ad I now realize, was not good for what I > was trying to do. > > Guys, you are AWESOME! Many hugs to all of you from beautiful Lisle, IL! > > - Igor > > ------------------------------------------------------------------------------ > Start uncovering the many advantages of virtual appliances > and start using them to simplify application deployment and > accelerate your shift to cloud computing. > http://p.sf.net/sfu/novell-sfdev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
