On Mon, Sep 13, 2010 at 10:50 AM, Thomas Powderly <tomp4...@gmail.com> wrote: > Two loops can be a problem > the 'outer' loop has to be the master > > we used to tune the hardware loop really 'tight' > and had jitter at the cnc control loop > we ended up 'de-tuning' the hardware loop to soften it a bit ( reduced gain )
Maybe I should turn the gain on the amplifier loop way down? i > its not hard to try with old school amps with pots, a bit more tedious > with software program tuning, still easy > > hth > tomp > > On Mon, Sep 13, 2010 at 10:25 AM, Leslie Newell > <les.new...@fastmail.co.uk> wrote: >> Two velocity loops shouldn't be a problem. Have you tried reducing the >> amp gain? Somewhere the amps must have controls for the loop gain. Try >> turning the gain down. It doesn't matter if the amp velocity loop is a >> bit weak as EMC's loop will compensate. >> >> Les >> >> On 13/09/2010 15:37, Igor Chudov wrote: >>> I posted a message to this list that my servo motors cannot calm down >>> after a motion. >>> >>> Right now my amplifiers are set to velocity mode and I use a >>> tachometer for velocity feedback. So, the amps themselves have a >>> velocity loop that they close. There is essentially two loops per >>> axis, one in EMC2 and one in the amplifier. >>> >> >> >> ------------------------------------------------------------------------------ >> 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 >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > ------------------------------------------------------------------------------ > 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 > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
