Thanks Brian (and others). I now have more speed and I now know much more about how TRAJ works I think, however, I still have one little problem which probably didn't occur at the low speed and which I don't seem able to get rid of. When the motor starts to move, it does two or three steps and then hesitates or even does a step backwards before setting off again up to speed. The same happens on the ramp down as well - the motor hesitates a couple of steps from the stop position. I have tried decreasing the Acceleration settings in the TRAJ, both
MAX_ACCELERATION and MAX_ANGULAR_ACCELERATION DEFAULT_ANGULAR_ACCELERATION and I also reduced the MAX_ACCELERATION in the axis section where there is also a STEPGEN_MAX_ACCELERATION which I don't really understand but reduced anyway. I had the linear axes ACCELERATION set to around 4 - 4.5 and they were happy at that - this is the same motor and I have reduced the MAX_ACCELERATION(s) to 0.5 without being able to clear the problem. Any more advice would be most welcome - thanks.. Incidentally, I now have the rotary axis running quite happily (apart from the initial dither) at 400 which is much better than my previous limit of 20!!! -- Best wishes, Ian ____________ Ian W. Wright Sheffield UK "The difference between theory and practice is much smaller in theory than in practice..." -- [EMAIL PROTECTED] -- http://www.fastmail.fm - I mean, what is it about a decent email service? ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
