>> That is why I think that 5i25 card would do much better - less
>> rewiring (actually You might get away with no rewiring at all) and
>> there also is price difference. Plug it straight in pci slot and
>> attach Your existing lpt cables to it. The only thing to do is sort
>> out the firmware - most probably, You will need to tell Mesa's people,
>> which exact pins are stepgen outputs, which pins are encoder inputs
>> and they shall arrange the rest - AFAIK the tool for users to
>> configure the 5i25 cards is not yet available.
>
> Very nice! Sounds absolutely perfect. Great price too!
>
> How many encoder counts per second does that card do?

The docs are over here
http://www.linuxcnc.org/docs/2.5/html/drivers/hostmot2.html
they say "The encoder sample clock runs at 33 MHz on the PCI Anything
I/O cards and 50 MHz on the 7i43."
without the filtering-mode "the quadrature counter needs only 3 clocks
to register a change"

So a change can be recorded at 33MHz/3 = 11MHz, and there are two
changes in one cycle, so in theory the max count-rate would be 5 MHz.

AW

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