A table with a suspension is a different story.
A suspension is irrelevant. The rigidity of the plinth is what is important.
Unless that means something other than what it says, you're changing your story.
My 'story' has been 100% consistent through this debacle. However I
suspect that my prior posts have not been read very well, or they have
been interpreted in some way I could not predict.
To be clear
here, the noise in our mastering environment is airborne. The vacuum
system sits in a box (to suppress noise) at the other end of a rather
long hose.
You say you understand this basic engineering principle (not mine by any means BTW), but the rest of the paragraphs contradicts that statement. So I think that the first statement must be false.I understand your engineering principle, but I question the significance. Will a massive plinth transmit small main bearing movement to the arm base? Excite a tuning fork and touch it to a big rock and the vibration is turned to heat. Even if it does transmit it, the resultant arm movement will occur after the main bearing event.
FWIW, I think we can be unconcerned about the bearing noise in this conversation (although I do think its important), unless the bearing chosen has serious problems! Even the bearing system employed on a lowly 1970s BSR is relatively quiet and not a source of trouble unless it is damaged or in need of maintenance. Modern turntable bearings are usually pretty good (although I have seen some wankers in some +$20K machines, worse than those BSR bearings I just mentioned but likely that is a topic for another thread). So the real issue is airborne and structural borne vibration, which I have maintained since the inception of this thread. If you don't get that, then you've not been actually reading my posts.
If you don't understand the bit about micro movements here, then my supposition that you don't understand the basic engineering principle is confirmed. You might want to have a conversation with a mechanical engineer whilst maintaining an open mind.What about micro movements you allude to? Not likely, and with the same time consideration.
Sound pressure waves hitting the platter are also hitting the plinth and arm at virtually the same time. To say that a plinth will insure coincidental movement between cartridge and record also doesn't make sense with regard to time. The impact on the record player is instantaneous and rotation of the record is continuous.
If you look at your second paragraph here, obviously you understand the problem, and then like Raul did a few posts above (see 'My God!') arrive at a false conclusion not supported by logic. I find it perplexing- so I have to assume that an agenda is underlying this that causes you to veer away from what seems a rather obvious solution. BTW, the fact of the platter rotating has nothing to do with this! Again, we discovered the problem and made measurements that confirmed it; it seems that those that are proponents of arm pillars have no measurements whatsoever.