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So, as the title explains I need a mount for my 70mm F/10 refractor, It has a fork mount (Alt-az) and the tripod head fell with crash to the ground. So, it wobbles a lot and it causes frustration to even point at Jupiter, I don't want to throw It away, It is a nice scope and my first scope, so I need some easy mounts to make. There are some threads (Forums) but I would like to make a custom mount!
I first made a 6" f/10 telescope back in 2002. It was, as everyone called it here "the minimum size you should make". So I went ahead with it. The f/10 was because some gentleman had ground the glass to f/10 and abandoned it in the local astronomy club and the president of which handed to me.
After having used the scope until 2009 (I went to UK for my Masters and bought my GOTO setup at the Telescope showroom I was working. I am primarily an astrophotographer, but one can never forget ones roots can we?
So, long story short, I am back to grinding a 6' f/8 this time, The FL now stands at 49" (f/8.1). I had finished fine grinding with 1000 grit SiC and moved to 1200 grit SiC but only to realize (after 30mins of grinding) that the seller had incorrectly labelled the powder as 1200 grit. I ended up with large pits all over the mirror and had to resort back to the "actual" 1000 grit SiC. This was yesterday. Now, after about 2 hours of 1000 grit, there are about a dozen pits of varying depth. I think another 30 minutes should get rid of them.
I tried making a polishing tool from White Portland Cement using the mirror as the mold and aluminum foil as separator. Disaster struck as the cement ate away the foil and got stuck to the mirror in the form of a thin layer (thankfully) and I was able to remove all of it by mild scrubbing and later grinding with 1000 grit SiC. The misadventures that I deliberately get into. 😕
Hopefully I can start polishing soon.
Wish me luck folks. I will post al developments here.
I am planning to build a Mirror-O-Matic machine, but since the designer Dennis Rech is not responding to emails anymore, I would be very grateful to anyone who could kindly share the plans of the machines you've built. Anything would be helpful. Images, plans, cur lists, advice etc.
I bought two new dew heaters. They are sold to be used on camera lenses and powered from USB. I have modified them to reduce the power from 8 Watt to 2 Watt which will be enough for my demand.
Some photos and documentation from this project:
This will be battery operated and I try to reduce the power consumtion of the equipment.