On 14 December 2012 20:46, Viesturs Lācis <viesturs.la...@gmail.com> wrote:

> Motors have 1000 CPR encoders. If I turn motor one turn in one
> direction, rawcounts pin increments approximately by 4000,

That might be correct.

> if I turn
> it one turn in opposite direction, it also increments by different
> number (it is changing, mostly in 2000-3000 range).

But that sounds wrong.

> The thing is that then LinuxCNC does not report any signal
> received at all. The cable was checked and it is ok.

It sounds like you definitely need some sort of oscilloscope.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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