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
