On Mon, Jul 15, 2013 at 11:29 PM, Sebastian Kuzminsky <[email protected]>wrote:
> On 07/15/2013 04:43 PM, Claude Zervas wrote: > > The current motion planner has some frustrating aspects. For example, > even > > when lines and arcs have tangential continuity the tool (brush) often > > inexplicably stops or slows way down at line->arc transitions which can > > cause unwanted artifacts in the painted line. > > Could it be you're in G61 (Exact Path) or G61.1 (Exact Stop) mode? That > would produce the behavior you're seeing. > > If that's the case, try switching to G64 (Path Blending) mode. It tries > to keep speed up, and sacrifices a small and controllable amount of > accuracy to do so. The optional P argument specifies how much accuracy > you're willing to trade away for speed. > > I usually run with G64 P0.0005 (my machine units are inches). > .. > Thanks Sebastian, I do use G64 and I've tried various values for P but it doesn't improve things much. I'm thinking it might be at least partly due to the fact that I use software step gen via the parport which limits the max acceleration for the various axes. Eventually I'll try a 5i25 to get better stepper performance - maybe that will ameliorate the situation.. The motion planner does work great when two arcs have tangential (C1 or C2) continuity but with lines to arcs or arcs to lines (also tangentially continuous) it seems to have problems blending, at least on my machine anyway. ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
