Greetings all; I've been playing with pid settings for the spindle on the G0704 until I'm discouraged at ever coming up with a setting that is useable in both high and low gears of the head. What works great at 300 revs in low gear sound like its ripping the teeth off the gears from oscillation caused by way too much Pgain when in high gear. Pgain of 2.0 is almost too much in high gear, while nearly 4 is decent in low gear.
So the thought has presented itself that I should do one of two things. 1, Throw a mux2 in series with the paths to each of the inputs to the pid, and switch the mux2's with a signal from switches on the knob, and having separate settings in the ini files []spindle_9] group for each side of the mux2's. or 2, a separate pid, with one mux2 to select which pid's output to feed on to the servo amp. Which is computationally less cpu usage 1, a 6 pack of mux2's, or another pid with separate settings and just one mux2 to select which pid gets sent to the spindle servo? I'd like to re-instate a 4th axis at the same time, which will mean a bunch of rewireing to move the spindle power start controls to the db26 connector on the 5i25 at the same time. The worst part of that is that its nearly 6.5 feet up in the air. And the garage has been re-arranged so I'd have to make a table to set that box on if I pulled it back down, so I'll probably work on it while standing on a 3 foot stepladder. Thanks everybody for any revelant data. 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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
