On Thursday 15 February 2007, Jon Elson wrote: >[EMAIL PROTECTED] wrote: >>"Peter C. Wallace" <[EMAIL PROTECTED]> wrote: >>>Step/DIR or quadature output selectable per generator. > >My UPC has had quadrature output available since I developed it. I >don't think more >than one user actually used the feature, and he was using an absolute >minimum >driver, just power transistors. But, yes, it seems to have significant >advantages >over step/direction! > >Jon
Generally I have to agree Jon, as the smoothest, most accurate mouse any of us has ever used was the decoded quadrature output amiga mouse of yesteryear, but it comes to mind, how does one handle the microstepping when using the quadrature signals if you can't step back and forth through the lookup table of desired currents using that? That would also seem to restrict you to 1/4 step resolutions unless the lookup table was two full cycles wide. Then one almost needs an index pulse too... Or am I miss-understanding the actual implementation? -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Yahoo.com and AOL/TW attorneys please note, additions to the above message by Gene Heskett are: Copyright 2007 by Maurice Eugene Heskett, all rights reserved. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
