On Fri, 2010-07-09 at 11:47 -0500, Jon Elson wrote: > Jake Anderson wrote: > > > > Currently I am running a > > P of ~3 > > D of .01 > > FF1 0 > > FF2 .03 > > FF2 .0001 > > > Why is the P term so low? Can you raise it? I know the Mesa is > different from my boards, > but I use P values from 50 to 4000 or so. I think this is the real > reason you have different > error at different speed. > > Jon > Hi Jake,
My Z axis on a cinci contourmaster (BP sized) mill is as follows; 5i20-> 7i33 -> 1525BR Servo Dynamics amp in torque mode -> Keling KL-34-180-90 -> 2:1 -> 10 mm ball screw. P = 600 I = 1000 D = 1.3 FF0 = 0 FF1 = 0 FF2 = 0 This gives decent but not phenomenal following error. ~ 0.0005". When I tried running the amp at max (7 A) it screamed at me. I only got stability when I backed off the current. It will still do 80 ipm so no problem. I should revisit the Z tuning with the idea of raising the P some more. I initially tried tuning with large FF1 values but as I decreased it the following error got progressively better. There is almost no difference between FF1 = -0.03 and 0.0 so I left it at zero. Dave > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
