Hi Andy, I am using an automation direct GS3 drive with one of their 3HP Micromax motors. Down the road I think I am going to try your suggestion. I am currently running the motor with a PWM signal - but in the process of changing to the serial port and using the GS2 driver - which looks like it will work for the GS3. (I guess I would have to stick to PWM if I wanted to try and control it like a servo?)
Anyway - I would like to get the stepper working for now - I already built the parts and installed it so.... want to see it work.... Either way I do it, I am still confused on how to do it, I have to set up the c-axis in the ini file and the hal files. Right now I have Axis0, Axis1, and Axis2. Axis0 is the X Axis 1 is the "y" axis which does not exist and Axis 3 is the Z. I am required to zero "y" axis in the Axis gui, (even though it really does not exist). Which from what I see just zeros itself and that is all. So would I just create an Axis 3 as a rotary axis - if so that is simple enough? How can I name it "C" because I think it would default to "A" which, I believe, on a lathe is the turret? - which maybe does not matter Thanks for the help On Sun, Aug 28, 2011 at 9:44 AM, andy pugh <[email protected]> wrote: > On 28 August 2011 16:00, Brian May <[email protected]> wrote: > > I would like to add a C-Axis. (I already > > have it built and attached). Basically, when wanting to do live tooling > > work, the C-Axis stepper motor engages on the spindle driving the spindle > > instead of the spindle motor. When the lathe is turning parts the C-Axis > > motor disengages. There is an encoder attached to the spindle so I can > keep > > track of its location. > > With a good enough spindle drive you might not actually need the stepper. > I did an experiment with a very old VFD and a conventional 3-phase > motor and it nearly worked. > > I think with a modern flux-vector drive it might work properly. > What is the minimum spindle speed your drive supports? (what type of > drive is it?) > > If your drive is capable of zero-speed torque then it just becomes a > case of unhooking the spindle speed command from motion.spindle-speed > and re-connecting it to the output of a C-axis PID control. This is > all reasonably easy in HAL. (you probably need an M-code to switch > modes) > > -- > atp > "Torque wrenches are for the obedience of fools and the guidance of wise > men" > > > ------------------------------------------------------------------------------ > EMC VNX: the world's simplest storage, starting under $10K > The only unified storage solution that offers unified management > Up to 160% more powerful than alternatives and 25% more efficient. > Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Brian May 506.8862.9162 (Cell) 506.2293.6375 (Office) ------------------------------------------------------------------------------ EMC VNX: the world's simplest storage, starting under $10K The only unified storage solution that offers unified management Up to 160% more powerful than alternatives and 25% more efficient. Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
