On Thursday 06 December 2012 14:38:54 Michael Haberler did opine: > Gene, > > just curious on your method: > > Am 06.12.2012 um 17:14 schrieb Gene Heskett: > > Chuckle.. NP Kent, but I would point out that it only takes one > > out-lier of an extra 50 u-s, in a 25 u-s loop, to cause a stepper > > stall and a wrecked part or tool. To me I could care less if its 2 > > u-s or 7 u-s because they aren't show stoppers. But that 2x a day 50 > > u-s lag IS a show stopper because that is the puppy that will > > cheerfully eat your lunch. > > How did you determine a) the stepper stalled (for how many steps?) and > b) actually the cause was the delay you mention? > > - Michael > If a stepper stalls, running above 1/3 its max speed, and does it at random times, that is the doorstep I lay the blame on. How many steps before I can hit the estop is immaterial because if it slips one step, it is stopped forever since it cannot re-accelerate to running speed in one step once the late step has passed, at least until linuxcnc slows down to reverse or turn a corner, at which point the motor may well picked and run again. But since linuxcnc is unaware of that, the point is moot, either the work, the tool, or both are probably damaged beyond repair.
Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! It is your destiny. -- Darth Vader I was taught to respect my elders, but its getting harder and harder to find any... ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
