On Tue, Oct 12, 2010 at 7:38 AM, Chris Radek <[email protected]> wrote:
> On Mon, Oct 11, 2010 at 05:18:14PM -0500, Stuart Stevenson wrote: > > > no regression > > > > http://www.mpm1.com:8080/machines/Screenshot1.png > > http://www.mpm1.com:8080/machines/Screenshot2.png > > http://www.mpm1.com:8080/machines/Screenshot3.png > > http://www.mpm1.com:8080/machines/Screenshot4.png > > > > The pictures show some of the progression during tuning. Number 4 is the > > final result. My questions have been trying to figure out why the traces > > have the spikes like they do. > > Oops, you are right - that last trace looks excellent. I do not think > you can improve it. Our planner does not limit jerk (derivative of > acceleration) and you are seeing your machine's mechanical response to > being told to transition from one acceleration to another > instantaneously. > > The only thing in Screenshot4 I think you could do is tweak the offset > pot on the amp just a bit to eliminate that .0001-2 offset. > that tweak is very slight - I have been putting a little twist pressure on the pot and can only get it to jump from one side of zero to the other - the point of diminishing returns is looming close - it is possible I may have to just live with a .0001-2 offset - oh bother :) The result of this discussion just confirms my belief that EMC2 is the best control software in existence. Although if EMC2 would develop a jerk limiter there may applications far beyond machine control! :) Hand held like a taser and maybe even mobile mounted on your car. ZAP ZAP ZAP thanks Stuart -- dos centavos ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
