Bart Libert (EducaSoft) wrote: > and doesn't it make a problem then that my pc has a maximum jitter of > around 45000 ? > > That's high, but the Universal Stepper Controller basically turns it into a servo system, where the PC is telling the step generator how fast to go, and then it counts its own step pulses to maintain exact position. (It can count actual encoders, if present.) This completely gets rid of the fast base thread, and so the only RT thread is the (default) 1 ms servo thread. 45 us jitter will make the sampling of position less precise, but it is still only a 4.5% fluctuation. So, that should not seriously affect performance.
The $79 Intel D525MW motherboard (add about another $90 for hard drive, memory and case/power supply) has latency around 5us, if you make a couple settings you can get it down to 3us (3000 ns as the latency test reports it.) Jon ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
