SNIP...
>
> I found a more disturbing problem - both versions seem to lose counts
> going in one direction (but not the other). I have a 2500 line encoder
> hooked up, so I should get 10000 counts per rev. Going forward thats
> exactly what I get. But turning it backwards, I get between 9700 and
> 9800 counts per rev. I have a 7i31 LED board connected, so I can
> carefully turn the encoder until I see the index LED light up, and I
> know I've done EXACTLY one turn.
>
> I suppose I should try other encoder channels, and/or another board,
> since I have two 5i20s, but its late - I'll look into it more tomorrow.
>
> I'm using the bitfile that is compiled into the driver. I don't think
> the corresponding VHDL source is in CVS anymore, the source we have
> matches some newer bitfiles. I'll try one of the newer ones tomorrow.
> Testing a bitfile when I can't examine the source is futile. The
> source that I did examine doesn't have any obvious issues.
>
> Regards,
>
> John Kasunich
Counting correctly in one direction and not the other could be an electrical
problem, but is most likely caused by a funky encoder (Needing A-B phase
adjustment)
Peter Wallace
Mesa Electronics
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