Quote:
Originally Posted by peter_4059
I also made a mod to my secondary mirror holder today that I've been meaning to do for some time. I machined up a thin aluminium disc to go between the plastic cell and the three colimation bolts. This prevents the bolts indenting themselves into the plastic cell - making rotation of the cell easier.
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Here is a mod I've done to an 8" reflector, with some sucess. I'm thinking about it for my 12". I have a feeling that I need accurate and reproducible secondary mirror movements to successfully use the autocollimator tool.
The main feature I used is replacing one collimation screw with a strong spring as shown by
jayscheuerle
http://www.cloudynights.com/ubbthrea...l/fpart/1/vc/1