Quote:
Originally Posted by bojan
I see a problem: if ever motorised, you may experience vibrations, if the secondary assembly is not properly damped with some absorption material (like rubber foam).
In my case, it took me quite a while to sort it out - I ended up with rubber foam wrapped around spider anchor (at the secondary side), this was sufficient to dampen the vibrations induced by stepper PWM driver (in micro-step mode)
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Hi Bojan,
My experience with a wired spider and a motorised scope has been fine. No noticeable vibration, quite the opposite in fact- it is extremely rigid. I think it is important that the spider be offset, as Phill's is and that the effective triangle be relatively large. A lot of spider's have the veins connect at 3 or 4 points on the hub which makes the spider susceptible to twisting.
If you have a look at Mel Bartels latest scope (trilateral mount) you will notice he uses a wired spider now too. I can't imagine him using one if he felt it was not compatible with a motorised instrument.
Rod.