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Thankyou for your reply Rally,
So your issue was high frequency vibrations forming a dynamic resonance. Is this a issue of the pier or is this a issue of the mount?
To me it would be more a case of in the pier, with adjustments and tolorances. Possibly due to the telescope being sufficiently big enough coming upto the PME's rated capacity and hence any dynamic vibrations start to affect.
If this where a real case and it happend all the time wouldn't mount design take this phenomena into account?
I also think that placing the CW further out would make the issue worse not better. Yes the leaver arm is bigger hence less weight but the ability for a weight further out where your natrual frequency decreases and hence has more chance of coming into resonance.
It is a tricky one high frequencies because they are hard to measure unless you have some really expensive tools.
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