On Tuesday 21 September 2021 16:53:44 Leonardo Marsaglia wrote: > > There may be a miss-understanding of its purpose,or I'm useing it > > off its purpose. > > > > I am feeding lincurve with the absolute z position as delivered to > > the motion input from the stepgen. So it knows where on the bed it > > is. That allowed me to setup a laser, useing a knife edge in the > > tool holder,and measure the bed wear error, program that into the > > lincurve module, who output is then applied to the offset to correct > > this error in the x axis as it moves in the z plain. So I can turn > > within a thou over 3 feet of z motion that has 13 thou of bed wear > > right in front of the chuck. > > > > Thats how I use it, but the offset module doesn't care where this > > offset signal comes from, so don't be afraid to let your imagination > > out to play with only a common sense chaperon. ;o) > > Hello Gene! > > Well, from what I understand your application is similar to what a > torch height control would do. That would have no problem because > you're moving short distances in (I guess) a not so high speed. > > But, I don't know if you tried the sim configs of external offsets. > There's one in particular that lets you modify the signal fed into the > eoffset and also the speed and acceleration of that particular > simulated joint. To sum up, you clearly see how the phase shifts > whenever you increase the amplitude of the signal or decrease the > speed/acceleration of the sim joint. I'm just thinking how to avoid > that phase shifting because all the parts I need to machine have a > register on them, so it would be nice to mantain that angle in phase > no matter what the RPMs on the spindle are. I think that to attenuate > the signal is more than enough to compensate for an out of range > speed/accel and avoid problems. > > I was thinking about doing an active phase compensation in HAL to > compensate for the signal lag whenever the rpms change, but I suspect > there's a more practical solution... > > Glad to hear you're doing well Gene :) > Not totally laid up, yet. But I'll be 87 very shortly, and the yard work I was doing for about 3 hrs earlier will still be yelling at me tomorrow. Getting old is not for the faint hearted, specially when your ticker is running on a battery and already has rebuilt valves just to keep it pumping at 30%. For me, thats good, and sure beats the alternative.
Besides, he is not ready for me yet, I'm too much of a maverik. ;o) Gabriel would send me down, I'd fix the stoker, install electricity and airconditioning, start a brewery and open a bar... Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
