Kirk Wallace wrote: > On Sat, 2010-12-11 at 12:28 -0500, John Kasunich wrote: > > Sorry to be so chatty, but... > > ... snip > >> But if the cylinder is too small, pumped too slowly, or the leak >> is too big, then the pumping might not be able to keep up with >> the leak. In that case, make the leak smaller or pump faster if >> you can. Making the pump cylinder bigger should be the last resort. >> >> Note that if you make the leak too small, then it will take a long >> time for the bucket to empty when you stop pumping. It's all about >> the tradeoffs... >> >> John Kasunich >> > I have been limiting myself to dealing with the 1kHz signal because it > is a common servo-period frequency and if one doesn't have a base > thread, a base thread would need to be added just for the charge pump. > But, that may be a reasonable requirement. > I don't think this is a concern. People who have hardware that removes the need for a base thread very likely also have a watchdog feature in their hardware. I know the Mesa and Pico products do, and I believe the Pluto does as well. (I'm not sure about Motenc and STG)
The only real audience for this circuit is people who use simple I/O, such as a parallel port or 8255-based card, with software step/PWM generation. - Steve ------------------------------------------------------------------------------ Oracle to DB2 Conversion Guide: Learn learn about native support for PL/SQL, new data types, scalar functions, improved concurrency, built-in packages, OCI, SQL*Plus, data movement tools, best practices and more. http://p.sf.net/sfu/oracle-sfdev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
