Quote:
Originally Posted by Wavytone
I see you have a conical polar axis with a large disk at the top of the cone just below the fork - are you using a roller to drive in RA via that disk ?
Reminds me of a massive steel fork I once made for a 12" Newtonian I once had... while it was great at first I found I found I couldn't stop the rust getting out of control and leaving the OTA outside was really really bad for the coatings no matter what I did.
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THis fork is nearly 20 years old and doesn't have anything but minor surface film. It is well - lubricated so I imagine that helps. The rollers seem to be fine.
THe rollers are at the top of the cone and the RA drive is at the bottom - it is close to the deck so i have to be careful! It runs very smoothly and slews nicely, though atthe extremes when the load is greates I slow the slew speed a bit to help things.