Hi All, We've got a new vector VFD for our mill. I was setting it up yesterday and it seems to work OK when operated from the front panel.
I'd like to control it using EMC, and there are several options: analog voltage 0-10V, RS-422, 10kOhm potentiometer etc. But I also found yesterday that the reference frequency can be sent to the VFD with a pulse train. The maximum frequency for the pulse train is adjustable, I think the default was 2.5 kHz. So, has anyone worked with connecting EMC to a VFD with a pulse train input? I have a 5i20 with some spare I/O. Is there an existing HAL component I could use, or do I have to write it myself ? I imagine it would create square wave on one output pin and the frequency would respond to spindle-speed-out (set with the S word in the interpreter) I saw that rigid-tapping has now been implemented. If I fit an encoder on the spindle, how much precision is required from the EMC-VFD combination to do rigid tapping ? I imagine the pulse train will first be for constant rpm, then slow down to zero, then a separate I/O pin flips the direction of rotation, and then we accelerate up to the set reverse rpm. regards, Anders Wallin ------------------------------------------------------------------------- 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
