On 14 September 2013 01:53, Cecil Thomas <[email protected]> wrote: > > I can even hide it inside the machine so no one will know it's > there.
I know where you are coming from, I am considering a CNC conversion of a Rivett 608. If you thought that the Monarch guys were going to howl…. > The default lathe setup has only 2 axes. It is not obvious to me how > to add the third axis for the speed knob. Can I add the third axis > in the .ini file without messing up anything???? The INI is not the place to play this game, this would all be in HAL. http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Closed_Loop_Spindle_Speed_Control is the sort of thing, except that he didn't have FF0 to play with. A typical spindle-control PID loop will be nearly all FF0 (direct command, with a scale) with just a hint of I and P to compensate for the nonlinearity of DAQ and drive. In your case you would simply pass the output of the PID to to a stepgen rather than a pwmgen. The PID gains would absorb the differences in detail. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ How ServiceNow helps IT people transform IT departments: 1. Consolidate legacy IT systems to a single system of record for IT 2. Standardize and globalize service processes across IT 3. Implement zero-touch automation to replace manual, redundant tasks http://pubads.g.doubleclick.net/gampad/clk?id=51271111&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
