On 01/27/2014 08:09 PM, Stephen Dubovsky wrote: > We have MPG 'banging' on two machines that are tuned fast and I just found > the 'ilowpass' example fix online: > http://linuxcnc.org/docs/html/examples/mpg.html > > Looks to be a FIR filter. I had actually found the 'limit2' and 'limit3' > functions first to use as rate limiters when searching. There is also the > regular 'lowpass' function. Any reason to use them over ilowpass? Im just > wondering if there is some backstory like ilowpass was developed before the > other functions were or somesuch.
I don't know. I think I was the first person to complain about this, and Jeff Epler whipped up ilowpass while I was talking to somebody for a couple minutes! Literally, just in a couple minutes. He needed to whip up an integer version of the float lowpass as the jog input to axis is an integer. This was probably at the 2007 CNC Workshop in Galesburg, IL. I'm still using this scheme as it seems to work very well. Jon ------------------------------------------------------------------------------ WatchGuard Dimension instantly turns raw network data into actionable security intelligence. It gives you real-time visual feedback on key security issues and trends. Skip the complicated setup - simply import a virtual appliance and go from zero to informed in seconds. http://pubads.g.doubleclick.net/gampad/clk?id=123612991&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
