On 11 July 2012 04:06, Kasey Matejcek <[email protected]> wrote: > It set to 1000 > setp ppmc.0.pwm.03.scale 1000
There goes that idea then. > when you watch ppmc.0.pwm.03.value it changes from 1000 to -1000 and back > and forth it goes > when I set s 50 rpm then after some time ppmc.0.pwm.03.value goes to like 50 > after some time but it still surges up and down and so does the number > if left long enough ppmc.0.pwm.03.value goes to 0 or some really small > number when the rpm is set lower than 100rpm but really never get stable > above 100 rpm it just keeps surging up and down Well, the good news seems to be that the hardware is doing what it is told to do, so this looks like a software configuration problem. Is it stable with FF0 = 56 (I think that was your number) and all other gains zero? A closed-loop spindle ought to work OK with just FF0 and a (small) Igain and all other gains zero. Does the velocity feedback from the encoder look good at a steady spindle speed? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
