Quote:
Originally Posted by gregbradley
It seems a bit of a conflicted mount. Good drive but bad PE.
I judge mounts almost exclusively on their PE. The trend is also for unguided with almost zero PE such as AP Mach 2 GTO using encoders.
I guess if the PE is very smooth then it may guide out easily but I would not want to rely only on guiding as that can be quite hit or miss and is a bit of an art by itself.
I am not sure what the advantage is of these drives if they have high PE. Backlash is more of a low end mount issue.
These mounts are competing with some pretty high performing mounts in that price bracket.
Greg.
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And I think think that's why harmonic drive mounts are still in their infancy. The real advantage of such drives really just for their weight to payload ratio; therefore for transportability/travel. For now, the PEs are somewhat addressed by guiding, although the newer RainbowAstro RST135E with encoders are looking to be interesting.
A question would be, would the prices go down if there's greater adoption?
Quote:
Originally Posted by TrevorW
I already have a Losmandy G11 looking for something a little more precise and accurate  |
Whilst researching into @codemonkey's Mesu 200, I came across the Gemini Telescope Design GTD E.Fric friction drive. Unlike the Mesu (or other friction drive-based mounts), it doesn't use encoders so it's priced somewhat more reasonably. There has been some other adopters in the other forums however insufficient to draw definitive conclusions.