On Sunday 26 January 2020 02:57:28 Andy Pugh wrote:

> > On 26 Jan 2020, at 00:56, John Dammeyer <jo...@autoartisans.com>
> > wrote:
> >
> > . LinuxCNC stops being an true open source solution the moment an
> > aftermarket hardware step/servo interface board is required.
>
> That rather depends on which board it is.
> The Mesa FPGA code is open-source, and some people have made their own
> Mesa style cards that work with the existing drivers. Also, the Mesa
> smart-serial protocol is open source, which allows the STMBL drive to
> appear as a smart serial peripheral to a host FPGA card.
>
With all due respect Andy, smart serial is going to have to grow an error 
correction restart capability. I have had it fail and the only restart 
is a full, count to ten, powerdown on the whole machine, interface and 
computer system before it will recover. I've hit this several times. 

Peter cannot duplicate it but both of my 5i25/7i76D's systems are doing 
it. Seems to be associated with a 100 millisecond power bump from a 
substation voltage regulator or something along those lines. Not long 
enough to reboot any of the computers. I have a shoebox out in the shop 
building running TLM w/o a ups with a 150 day uptime right now. But it 
has only a 5i25 & bobs.

> The situation with EtherCAT is more complicated.

And I think proprietary?
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Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>


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