On Tue, 6 Aug 2013, andy pugh wrote: > Date: Tue, 6 Aug 2013 22:23:35 +0100 > From: andy pugh <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: Re: [Emc-users] A puzzler > > On 6 August 2013 19:47, Peter C. Wallace <[email protected]> wrote: > >> Looks like 64X or 32X would be the maximum interpolation ratio without using >> a >> higher mux frequency. 256X requires an equivalent counting frequency of about >> 8MHz. This is out of the range of muxed encoders. > > Are you basing that on the max frequency of the chip? > > This was what he said: > "Sounds like we're way off the limits in terms of count capability of the > 7i77. > "transition distance" is set to 0.77 us > Even at rapid of 2000 mm/min, we're only at 0.85333 Mhz into the 7i77 and > 3.3 khz into the interpolator"
.77 usec might fail with the filter on... > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > ------------------------------------------------------------------------------ > Get 100% visibility into Java/.NET code with AppDynamics Lite! > It's a free troubleshooting tool designed for production. > Get down to code-level detail for bottlenecks, with <2% overhead. > Download for free and get started troubleshooting in minutes. > http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
