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My astronomy project:
Repair the friction coupling:
Look at these projects too:
1: Introduction focuser
It's very common focuser today have a friction coupling, that's fine and give very smooth focusing compare to a rack and pinion focuser. But problems can arise if you have heavy load on the focuser, a camera or similar. I have problem with that, when telescope is pointing upwards the friction coupling slips and can't move the camera. I have adjusted the force that regulate the friction and got it a little bit better. Sometimes when the telescope get wet because of moister the problem get worse, the water act as a lubrication between the friction surfaces.
Now I decided to take the focuser apart and see if there is something wrong or something that I can rebuild and make it better. My focuser is a 3" dual speed mounted on a TS130 APO refractor, this is a special option, normally there is a 2.5" focuser on this telescope.
Here are some information about focusers:
I have built a compact motor focuser to my telescope. It's not so easy to see that there is a focuser down there.
As usual I will spend another day working with my telescope, luckily me I feel to some degree it's fun.