Thanks Andy,
Just more and more complicated.  Need to take a step back and just figure out 
how encoder edges seen as 1's and 0's in hal_parport.c turn into spindle 
velocity.
And in the other direction how a S600 ends up as the PWM 1's and 0's in 
hal_parport.c.
John Dammeyer


> -----Original Message-----
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: May-08-20 4:08 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Sourced from: Re: Fluctuating RPM using CUI ATM 10 
> encoder
> 
> On Fri, 8 May 2020 at 03:42, John Dammeyer <jo...@autoartisans.com> wrote:
> 
> > Do you know which source code file has the G33.1 control?  I'd like to look 
> > at how it's done.
> 
> It's one of the more deeply-embedded ones as it needs to do a lot of
> work in the realtime context.
> 
> interp: 
> https://github.com/LinuxCNC/linuxcnc/blob/master/src/emc/rs274ngc/interp_convert.cc#L4764
> 
> TP: https://github.com/LinuxCNC/linuxcnc/blob/master/src/emc/tp/tp.c#L1460
> 
> TC: It is scattered all through tc.c, search for "rigid" in the file:
> https://github.com/LinuxCNC/linuxcnc/blob/master/src/emc/tp/tc.c#L826
> 
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> � George Fitch, Atlanta Constitution Newspaper, 1912
> 
> 
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> Emc-users@lists.sourceforge.net
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