Le 08.08.2013 05:45, TJoseph Powderly a écrit : > On 08/07/2013 06:34 PM, Andy Pugh wrote: >> >> On 7 Aug 2013, at 23:49, TJoseph Powderly <[email protected]> wrote >>> non-linear?, ok >>> i read it repeated to same value from origin, but was consistantly off >>> at some extreme. >>> np. discount bad mounting >> It seems that the sine/cosine signals from the scales do not actually repeat >> every 10um. >> >> This is the guy's YouTube video. >> http://www.youtube.com/watch?v=iIdidzAPgBs&sns=em >> >> What he is comparing is the sine/cosine phase as measured by the >> interpolation software, the position as measured by a 0.1um probe and the >> distance measured by linuxcnc. The phase should be zero every 10um. It does >> not appear to be. >> >> >> ------------------------------------------------------------------------------ >> 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 >> > i think the reported values from the IC Haus chip can be looked at with > his setup. > > but the actual sinuses from the Heidenhain scale are _not_ observed by > his setup.
to check a sin/cos encoder, put a scope on XY display (X = sin, Y=cos). You will see a circle when you move the encoder. This circle must remain a circle, at high speed diameter may be smaller, but in any case the center shall be completly clear of any signal. Any signal out (or inside) of the circle perimeter is an error. ------------------------------------------------------------------------------ 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
