Thanks Joshua,
During the summer I spend my time on the car and not very much progress on my astronomy projects.
Most of the nechanical on the foucser is today ready for a test. But the stepper motor isn't finished yet.
Latest progress:
http://www.astrofriend.eu/astronomy/...-friction.html
At the botton a link to the stepper motor driver project. A lot of new things to learn until I can manage this.
/Lars