On Sat, Sep 11, 2010 at 02:02:32PM -0500, Igor Chudov wrote: > > after a movement, the Y axis cannot calm down, the Y axis servo just > keeps buzzing and vibrating somewhat. Y axis is the heaviest axis on > this knee mill.
Do you know yet whether it's the velocity or position loop that's oscillating? If you unhook EMC's command output, does the vibration stop? You may need to tune the velocity loop. First make sure your limit switches are working right (!) and then command a velocity step using hal or a battery. Monitor the velocity (use a scope in difference mode across the tach) and check overshoot and stability that way. Only once you have this stable can you hope to tune EMC's loop. Monitoring velocity response to a step like this will also give you a good feel for the real acceleration capability of the hardware/drives. ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
