Jump to content


My scope after maintenance, with pictures

Recommended Posts

Well after a week or two of on and off attempts at maintaining and modifying, my scope is now done up to what I think is a pretty good standard and lots better than a few weeks ago.

First up was getting rid of those pesky collimation hex bolts and instead replacing them with a DIY version of Bob's Knobs. These were made of three 25mm m4 thumbs screw which were inserted into the holes where the hex bolts used to go. I found these new thumbs screws to be a bit short so I devised a solution whereby I stuck a pile of washers on the back of the secondary to make up the gap. This works quite well and there is more than enough travel in the screws to perform a decent tool-free collimation of the secondary.

Second job was washing the primary mirror which after 9 months of use had gotten pretty dirty. I followed astrobaby's advice on cleaning using soap flakes and distilled water which did alright in removing the big patches of grime but this failed to get rid of a residue which had settled on the surface even after two washes. To get rid of this which I did yesterday after a second wash was I spread a small amount of lotion and washing up liquid and lightly rubbed this in and immediately washed it off. The mirror came up sparkling clean and looks good as new and I hope to keep it that way for a good while yet.

My other job was to have a crack at flocking the tube spurred on by Stafford Stargazer. I bought the flocking material direct from johninderby and I received them on Tuesday after a trip to collection office because no one was in when the postie came. I also bought a tin of blackboard paint from wilkos to do the secondary, the spider vanes and the bits that I missed whilst flocking. I did this on Friday evening under the promises of a cloudy night so I had nothing to lose if I failed to complete it that night. TBH I found flocking tricky, a case of harder than it looks for me, I messed up a bit with my alignment of the material so it went a bit skew and sort spiralled up the tube a bit. Not so much of a problem at the top of the tube because I overlapped it and cut it to fit but at the base I was left with a 4 inch or so gap and one side was higher up the tube than the other. I might rectify this the future by adding another sheet of flocking, but for now I have painted the very bottom with the blackboard paint I bought instead.

I had a problem with paint sticking to the other bits I had painted such as the various screws and nuts, it flakes off when I screw them through the tube, it seems to be very fragile stuff and it is water based so I am unsure how it will hold up to dewing in the winter especially. I am going to roughen up the exterior of the focuser drawtube to make it stick as I had top remove it due to big flakes falling off it.

But all in all after everything I think the telescope is a lot better for all the work I have put into it and I am glad I have done it now. It has given me the practice I need for when I have another scope in the future. I just hope now that astro society I have borrowed it off like the changes :)




Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.