On Sun, Oct 29, 2017 at 3:37 AM, Nicklas SB Karlsson < nicklas.karlsso...@gmail.com> wrote: > > > Then of course he is uses an $8,000 servo controller to hit those (x,y,z) > > points so no surprise the circle is spot-on perfect. > > > > > > I am always impressed when some one finds a way to do impossible things > > with no effort. > > To pay someone else to do work is a simple method to do things without effort. Only problem is where do I get the money?
Try begging it is quite effective For no money all you get is to read about great ideas which to me is most of the fun. Now the problem is I can't afford an $8000 Ethercat based servo controller. But I wonder it the same principle can't be applied to any serial multi drop bus? As long as there is a "master" that users a hardware clock to shift bits out of a hardware buffer then it should work Yes, the german guy in the video had a university funded system. Not many of us can afford to buy what did. But as I just wrote above, i think other buss types would work. Next I think it a good idea to study CANbus. The so called "Controller Area Network" is cheap to implement and logically is seems a lot like Ethercat. I'd prefer Ethercat because every PC, Rasbury Pi and Mac has a built-in Ethernet port so there is no hardware to buy and install but the slaves are expensive. Now that we have an "existence proof" I', thinking that EMC/linuxCNC/MachineKit have partitioned the problem wrong and the result is that it forces a requirement for hard real time to far up the chain. OK, "wrong" is to strong of a word to fault the original designers. They where working in a world where cheap micro controllers did not exist. tour of the hardware <https://youtu.be/Ru9ylsm0uAA> Using the hardware. Here he uses a cell phone to measure table accelerating and at the end mills a circle. 0.02mm eccentricity linnuxcnc/ethercat demo <https://youtu.be/7kn-G5HFjD8> As I said, cANbus might be a something for hobby level budget. I don't know yet. -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
