On Mon, 27 Jan 2014, Stephen Dubovsky wrote:

> Date: Mon, 27 Jan 2014 21:09:59 -0500
> From: Stephen Dubovsky <smdubov...@gmail.com>
> Reply-To: "Enhanced Machine Controller (EMC)"
>     <emc-users@lists.sourceforge.net>
> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
> Subject: [Emc-users] MPG ilowpass vs limit2/3
> 
> 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.

ilowpass is a low pass filter with integer inputs and output so matches the 
integer counts from the encoder component and the integer count inputs 
of motions jog pins without having to add a conversion function.

>
> Thank you,
> Stephen
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Peter Wallace
Mesa Electronics

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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
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