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Re: disagree, with reservations

Guess I should have emphasized the way around that is obviously used in some tables, like the Teres armboard shown..

As mentioned .."Ultra-overkill massive construction, careful attention to mass-balancing, and then patient testing may be how these all come to terms with ..."

In some cases, though, yes, outboard arm-mounts lack physical integrity, as materials, or based on construction / design.

But beyond the 'lever' issue, presented by that situation, my other point is that :

If the armboard represents any lesser a massed physical presence than the mass of the plinth, it becomes a target for motor resonance proceeding from the greater resisting area (mainland) to the lesser resisting area (peninsula).

Until the armboard region of the system represents at least as imposing a resonance-conducting venue as the plinth, it's a path of least resistance. Isn't it ?

In the case of your Teres armboard, the layered & ultra-rigid approach probably represents an imposing roadblock to resonance. Not so the simpler-construction, simpler-material, outboard armboards we see sometimes. (Besides, w/ DC servo beltdrive, there's way less to fear by way of rumble than with an Idler-coupled design..)

J.



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