Anders Wallin wrote: >>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. > Many VFDs have an option for a jog button. You could set up another digital output to command the VFD to jog, with the jog setting in the VFD set slow enough that stopping at the orient point is close enough. It depends on how fine the position needs to be for your tool changer.
A single sensor could be arranged through HAL to stop the jog when the sensor is reached. If the motor has to hold the orient position against forces during toolchange, then you have a more serious problem, and a simple VFD will not do the job. Jon ------------------------------------------------------------------------- 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
