Hello everybody, I've been reading this topic about using two motors to change from a high speed spindle for turning, to a low speed but high torque C axis to mill parts, and I think it's a great project to get involved with emc.
I would like to ask about this, because in my head I always think about the complication with the tracking of the C axis when this one behaves like a spindle. What I don't picture very well, is, what would happen If I use the spindle of a regular lathe (with the encoder mounted on it to track the position and velocity) between spindle mode and C axis mode. I mean, if I'm using it as a regular spindle in velocity mode, but then I want to change the process and do some milling using for example a clutch or something to change between the two motors, I can't imagine how to avoid the following error, since the encoder on the spindle would be my position and velocity feedback. May be I'm missing something, because I only used emc to make positioning work with stepeers. I hope I've been clear about my doubt, since this is a must do because we have two or three old lathes that would be perfect for this, but at the moment we are very busy with other complications. Thanks as always for everything! Best regards from Argentina. Leonardo. 2011/8/29 Brian May <[email protected]> > HI Andy, > > That worked perfect. At least for the stepper motor... Down the road I > will > try with the spindle motor. > > Thanks for the help. > Brian > > On Sun, Aug 28, 2011 at 2:36 PM, andy pugh <[email protected]> wrote: > > > On 28 August 2011 20:28, Brian May <[email protected]> wrote: > > > 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?) > > > > You might well be able to control it with serial. But PWM definitely > works. > > > > > 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? > > > > It's easiest if Axis 5 is the C axis. > > I have had a fiddle in a simulator. > > In the [TRAJ] Section of the INI you need > > AXES = 6 > > COORDINATES = X Z C. > > > > You then need to set up an [AXIS_5] Section with the parameters for > > your C axis. > > Set HOME_SEARCH_VELOCITY to zero, unless you want to set up homing to > > the encoder index (there isn't much point generally) > > > > In the HAL file clone one of the other axes (assuming that they are > > stepper) and connect to the axis.5.xxxxx pins instead of 0 or 2. > > > > That _should_ do it. > > > > -- > > 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) > > ------------------------------------------------------------------------------ > Special Offer -- Download ArcSight Logger for FREE! > Finally, a world-class log management solution at an even better > price-free! And you'll get a free "Love Thy Logs" t-shirt when you > download Logger. Secure your free ArcSight Logger TODAY! > http://p.sf.net/sfu/arcsisghtdev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free "Love Thy Logs" t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
