Am 06.07.2013 um 17:15 schrieb Lars Segerlund <lars.segerl...@gmail.com>:

> It would be nice to use the arduino as backend, stepgenerator or so,
> and linuxcnc as frontend for heavy stuff ....

that has in fact been done already several times for steppers

see picnc which will be integrated going forward, although it uses a PIC: 
http://code.google.com/p/picnc/

also, if you view the AM335x PRU's in the BeagleBone as 
32-bit-200Mhz-arduinos-on-steroids with no extra packaging cost, that is a 
pretty hard to beat package at $45 

unfortunately none of these non-FP CPU's of one kind or the other solve the 
nastier problems, for instance a high-speed, precisely timed servo loop, or 
e.g. digital notch filters in the servo loop to suppress machine resonance

any takers for an OpenCL-based HAL instance? that could potentially redefine 
the playing field wrt highspeed FP backends

- Michael

> 
> Floating point is nice but people tend to trust it :-D .... so I have
> actualy had more problems getting things running in fixed point code,
> but more problems getting stuff 'safe' or bugfree in floatingpoint,
> it's so easy to loose precision.
> 
> / regards, Lars Segerlund.
> 


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