Now I found what happens in the mount and cause the friction.
It's only when the cluthes are open I have friction. When closed and tracking it rotates with the two other roller bearings and then it's almost no friction. Good!
Some photos from when I testing this:
http://www.astrofriend.eu/astronomy/...ebuilding.html
For me it had been better without these clutches, less complicated and more compact, save some kg also.
If I ever build my own mount it shall not have any clutches and no gearboxes. It shall have direct driven 3-phases DC motors. For the moment only a dream.
Until then I collect information:
http://www.astrofriend.eu/links/link...rivemount.html
/Lars