RoboFocus on a Refractor

Davoud:
I have installed a RoboFocus on my FSQ-106ED...

Please see http://www.primordial-light.com/fsq-robofocus.html.

jtaylor:
If you're that worried about mild steel corroding in use, you should still
be using some form of anti-sieze [sic] between the stainless screws and the
aluminium casting.

I hope that I made it adequately clear on the referenced web page that
I am not an expert in these matters. I am possessed of a certain amount
of practical experience in the field, however.

I am not in the least "worried" that mild steel would rust in ref
application - I _know_ that it would rust, so I would not use it.
Except for my painted steel pier, I believe that practically everything
in the telescopes and ancillary equipment is made of aluminum,
stainless steel, bronze, or plastic.

As for the need for anti-seize compound, I have found that with coarser
threaded stainless steel (such as the 1/4" X 20 that I used) seizure is
unlikely outside a corrosive environment. My 'scope remains in a
humidity-controlled observatory environment. Putting a very light
coating of white lithium or other thin grease on the threads before
insertion will serve the purpose, and I shall update the web page to
note that.

Thanks,

Davoud

--
usenet *at* davidillig dawt com