On Fri, Mar 26, 2010 at 11:40:03PM -0500, Jon Elson wrote: > > I've been thinking about how to best deal with CNC control of spindle > speed on a machine with manually-changed belts and gears.
I have two gears on my lathe. The gear change is done with M codes instead of belts/levers, but that's not important. The important thing is the feedback to EMC is the resulting spindle speed. If the gcode requests a speed that can't be reached for whatever reason, spindle-at-speed never gets asserted, so the motion won't start. I have a vcp led showing "at speed" and if the tool is not moving and the light is not coming on, it means I probably forgot to pick the right gear. Like you say, the problem is usually apparent from the sound. spindle-at-speed won't let the program cut at a wrong speed, whatever the cause. I don't know if this is a full solution but it seems good enough for me - maybe this can be part of your answer. Chris ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
