Thankyou Lewis!
I have got the secondary in, and the focuser mounted. The focuser mounting brackets I was going to build out of something other than aluminium (due to it's problems with temperature change) but only remembered that after I had made them
Oh well, we will see how it go's.
I have been thinking about how to drive the focuser, originally the idea was to use the usual timing belts and pulleys but I thought that if the camera is hanging down under the focuser it would try and slide the draw tube out and the motor (if not under load) will let it happen. So that got me onto the idea of using a worm drive, which will keep the focuser continually locked unless the motor turns.
I have made a worm gear before using some threaded rod so was able to make this one this arvo pretty easily. Now I have just got to think of a way to hold the worm and motor
You may recognise the gear as once being the top part of a VCR head? Now put to better use!
Cheers
Jo