On 5/25/2013 12:34 AM, Jon Elson wrote: > andy pugh wrote: > >> I understand that gentrivkins and ja3 works acceptably, but I have no >> idea if this also includes index-homing. It seems to me that it can >> only really work if the two indexes are set up in the right place. >> (or, I suppose, if the encoder components grew a fixed-offset pin) >> >> > What you'd do is allow the gantry to relax, perhaps use a traveling gauge > to prove the gantry is orthogonal, and then align both encoders so they > give the index signal. Most likely, the machine is already set up so the > encoders both show index at the same time. > > Jon > > If you have a big gantry, you don't want to have to rotate the motors or encoders to get the index pulses aligned.
Consider a gantry that has 1+ kw motors on each side of the gantry with gearboxes and encoders integral to the motors. That would not work. Dave Cole ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
