Thats brilliant! Very interesting info Sam! Stephen
On Mon, Feb 24, 2014 at 2:19 PM, sam sokolik <sa...@empirescreen.com> wrote: > I have been testing a few things - 7i80, Robs new TP. I thought I would > combine the two. After finding out that the mesa encoder counters will > count step/dir (awesome work Peter!) - I thought 'hey - I can log the > printer port from linuxcnc' > > http://youtu.be/qo74moJ30H4 > > Then I though 'Hey - mach outputs step/dir...' > > http://youtu.be/HfU4uyGgLZw > > Now I don't actually have a license for mach so I am limited to > 500lines. So the couple of programs I have tested are short. I have > compiled some info here. > > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?NewTrajectoryControl > > I would like to test more systems in the future. > > Now the spikes you see on the mach plots are probably normal. (At least > Art admitted that the timing out of the printer port isn't perfect but > works well) > > There are a few points. > -mach seems to violate acceleration constraints a lot. (assuming I am > not doing something wrong) > -The new linuxcnc performs very well in comparison and seems to give a > lot more control over path. > -I am a little biased.. (but I didn't fudge the numbers) > > BTW - people worried about program pause getting mucked up with deeper > lookahead... It works very well still. It is pretty instantaneous. > You hit pause - linuxcnc starts de-accelerating immediately and stops > within its constraints. I did get to see the mach delay with pause that > people complain about (which from what I hear is going to be better in > ver 4) I had to set the look-ahead in mach to 200 to get it to run my > short programs smoothly. The pause was delayed by quite a bit. (It was > hard to pause it before the short programs would finish.) > > overall - I hope some hard number help the conversation :) > > sam > > > ------------------------------------------------------------------------------ > Flow-based real-time traffic analytics software. Cisco certified tool. > Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer > Customize your own dashboards, set traffic alerts and generate reports. > Network behavioral analysis & security monitoring. All-in-one tool. > > http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis & security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
