> I would like to fit a VFD to the spindle of my 3 axis mill. How should I > set about controlling it? Apart from obvious speed control, I would > like to achieve oriented stop (boring and tool changer) I am currently > using an m5i20 and m7i33 under EMC 2.1.6.
How you control the VFD will depend on what control options your particular VFD has. Some older ones have a 0-10V analog input and one digital input for start/stop and another for forward/reverse. I'll be interfacing EMC to a new VFD soon and I'm hoping to use its pulse train input so I won't have to mess around with digital to analog conversion. oriented stop will require an encoder on the spindle, and probably the VFD has to work in some kind of position-mode. Doable with a modern VFD but could be harder with an old one. The encoder will give you rigid-tapping capability too! (and you can follow how much rpm drops under load) AW ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
