John Kasunich wrote: >I need to type slower, or read before I hit send. > >John Kasunich wrote: > > > >>Andy Holcomb wrote: >> >> >>>http://littlemachineshop.com/products/product_view.php?ProductID=2938 >>> >>> > >Nice. Pricey too... > > > >>>Can EMC II use a jog wheel yet? >>> >>> > >Yes. > > > >>>If so what is required? >>> >>> >>A jog wheel. The ability to count the pulses it makes. Hardware pins >>to get the pulses into the system. A few lines of HAL code to hook it up. >> >>The wheel you linked to has 40 counts per rev which is typical. >> >> > >400, not 40 > > OK, that makes a difference. If it is a 100 cycle/rev encoder which will provide 400 counts/rev, then you may not want to run it through the digital inputs of any of the Pico Systems products, as it will get jumpy somewhere around 1 - 2 RPS, due to the 1000/sec sampling of the inputs by the ppmc driver. Hooking it through a spare encoder input would be fine, as the quadrature transitions would be correctly counted, and the total position would be made available on a hal pin 1000 times a second. Otherwise, you could turn up the servo update rate or rig the jog wheel through a second parallel port to the software encoder counter.
Jon ------------------------------------------------------------------------- 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
