Hi John! On 11/27/2013 06:26 PM, John Alexander Stewart wrote: > Hi all; > > Here's a neat little page: > > http://funofdiy.blogspot.co.uk/2013/10/a-raspberry-pi-controlled-mini-laser.html > > Wonder how it would run from LinuxCNC? Same "issues" with path acceleration > values, and so forth? > > Hmmm… ;-) > > John A. Stewart.
Thanks for the link, very nice work :) I'm sure, LinuxCNC could control this thing easily. The advantage would be, that especially those "issues" with the acceleration would not be present, as LinuxCNC uses acceleration and deceleration ramps in every change of speed. I'd probably use an adjustable current source for the laser diode and control it from LinuxCNC as well. This would give the possibility to draw in "grayscale". A simple multiplication with the current velocity could then also remove the effect of varying move speed on the grooving. The use of python for something with realtime constraints such as moving a machine head looks like the worst possible solution to me. LCNC achieves hard realtime determinism, so this would greatly improve the performance of the whole thing. Regards, Philipp ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
