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 )
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 <[email protected]> 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 > [email protected] > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
