On Thu, Feb 3, 2011 at 1:18 PM, Les Newell <[email protected]>wrote:
> That would be FF0. Assuming the friction is directly proportional to > speed then FF0 will increase the output directly proportional to the > commanded speed. It does mean that it will over compensate a bit while > accelerating up to speed but that is fine because you need more power to > accelerate anyway. > > Les, I thought that friction is not at all proportional to speed? It is a value that only depends on the direction (sign) of speed, not on the value of speed. Am I mistaken? i > Les > > On 03/02/2011 19:09, Igor Chudov wrote: > > Kirk, I know that you all are awesome guys, a wealth of knowledge and > this > > is the most helpful mailing list that I have ever been on. I just tried > to > > steer the discussion in the direction that I think is the right one. ;-) > > > > Anyhow, how hard do you think is it for a C++ programmer to add a > friction > > compensation to EMC? Ergo, look at Andy's post from a while ago: > > > > > http://www.mail-archive.com/[email protected]/msg22729.html > > > > It would appear that friction compensation (let me call it FFF for now) > is > > just one more term, something like > > > > > > ... + FFF*<direction of rotation> + ... > > > > where<direction of rotation> is sign( C-M ) > > > > Am I making sense? > > > > ------------------------------------------------------------------------------ > Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! > Finally, a world-class log management solution at an even better > price-free! > Download using promo code Free_Logger_4_Dev2Dev. Offer expires > February 28th, so secure your free ArcSight Logger TODAY! > http://p.sf.net/sfu/arcsight-sfd2d > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
