Indeed I have a lot of things to learn and I have received very knowledgeable answers.
I wonder if it worth the effort to push a stepper driver so much. Stepper motor would become an option over servomotor ? What would be the final achievement ?
Looking trough internet for Field Oriented Control I have found 2 interesting papers :
http://www.he-arc.ch/hearc/fr/imi/pu...dia_dsp_06.pdf
http://www.csuohio.edu/engineering/e...004/Bhavin.pdf
(Latest one it's an master thesis and I think that it could be "compressed" in a singe dsPic.)
It seems that Field Oriented Control in this moment it's too much for me.
However, I won't give up.
Bottom line doesn't seems to be such a wrong direction to do ADC over winding coil current. I don't know yet what kind of regulator would be needed.
I have received also many interesting ideea's from another great guy from this forum MaX-MoD.
He pointed me to
http://papsi.origo.ethz.ch/ project . It's a dsPic based stepper driver.
I will try to move further from this project.
Regards,
Daniel