On Tue, Feb 12, 2013 at 10:08 AM, Todd Zuercher <zuerc...@embarqmail.com>wrote:
> I am not always a fan of just killing the power to every thing on an > e-stop. On our high speed routers if you just kill power to the spindle, > they can coast for hours. It takes quite a while to stop from 18K rpm with > out any DC braking. So I have the e-stop triggering the external fault > circuit on the spindle inverters instead of just cutting power to them. > I always wondered about this. If the drives are working, they can stop motors a lot faster than just letting the outputs float. With brushless motors, it seems like letting the drives have a shot at stopping things is your best chance. Not sure with motor types that don't require commutation. Eric ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
