Just wanted to thank everybody for all the excellent feedback. At the moment I'm leaning towards this being a cable shielding or grounding issue with my driver board (as suggested first by, I believe James Reed). I have had suspicions that I had some sort of grounding problem for a while, and his explanation of how a bad ground can cause a signal to be misinterpreted and reverse the feed direction made a light bulb go on. I'm still figuring out exactly what I'm going to do to resolve it, but I think that's the direction I am headed in.
A brief note about the 40 ipm feedrate I have been trying to test this at: I should have noted that there was almost no load on the cutter during these tests. I have been cutting about .04 inches into a wooden board for these tests, just to try and isolate what it will take to the motors to work smoothly and reliably. I would definitely slow it down if I was making more realistic cuts. Also, my X + Y screws are each 5 tpi, so the setup is sort of geared for zippiness as long as I don't try to cut anything at all substantial. :-) Thanks for the notes on the HAL stepper settings and possible stepper resonance issues. Hadn't heard of ether of those before but will keep them in mind as I proceed. Thanks again for the overall level of response on this issue. I have been impressed. I'll let you know if I come up with a resolution (or more questions :-) )... ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/blackberry _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
