On Saturday 06 July 2013 15:01:10 Jon Elson did opine: > EBo wrote: > > Seriously though, we should > > > > be able to merge Araisrobo's code and add spindle synchronized. > > Well, it is pretty obvious to me that jerk limiting and having the Z > axis follow the spindle are in conflict. So, I think the jerk limiting > may need to be turned off when in a spindle-sync move. Generally, sane > G33.1 operations won't cause excessive jerk, so that probably is OK. > One also may need to control the rate of spindle reversal, which you > need to do anyway to allow Z to keep up. > > Jon I could see that in a mill with a high speed spindle, (but who is going to spindle synch a 70k rpm engraving spindle anyway?) but in the case of my toy lathe thats now wearing a 5" chuck, between the weight of the chuck, and the mass of the combo fan & flywheel on that 1HP motor, sheer mass of what needs to be reversed seems to put a lower limit of about 1.5 seconds per reversal done from 300 rpms while running a loop that makes a peck cycle out of the G33.1 function. Z accels under those conditions are maybe 1% of what that z is capable of. A G0 move can be as high as 60ipm with the new ball screw setups.
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! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> Age before beauty; and pearls before swine. -- Dorothy Parker A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
