EMT 927 vs. Micro Seiki 5000 or 8000 - different?

Dear Chris, I thought about the 'tank' instead of the elephant because I already anticipated such comment. But in literary sense this made no sense to me. But I was not able to find some military equivalent for the mouse.
This is the usual problem with methaphoric expressions because nobody can resist the chance to tease. However I deed mentioned that my speed check was with the stylus in the groove. I also asked for the data of the forces involved but this is somehow overlooked...

Dear Dover, "direct drive"? You hear speed instability in a direct drive turntable? All of them or one or two samples? A truly vintage direct drive turntable that has not been serviced can manifest speed instability due to aging capacitors, but the technology is not in any way speed unstable per se. If you hear speed instability in a direct drive turntable or if speed is grossly unstable by observation of the typical built-in strobe, then the table is defective.

I am not qualified really to hold forth on belt creep. Instead I can recommend that you go to Vinyl Asylum and do a search on that term. Then read the relevant posts by Mark Kelly. Belt creep is not incurable, by the way, as Mark shows. But also take a look at the Artemis turntable, where the belt travels around a capstan so as to nearly fully encircle the platter, a la one remedy suggested by Mark and others. But really I did not mean to detract from your pleasure with your turntable or to infer that it cannot be fantastic just because of this theoretical issue. I apologize if you got that message.

Dear Nandric, the VTF seems trivial but when you consider the very tiny area over which that downward force is distributed (the contact between LP and stylus tip), then the force per unit of area is very very large. This is not to say that I don't also have trouble with the concept. Nevertheless, all empiric and circumstantial evidence suggests it is a real phenomenon.

Dear Lew, this is not my domain but if we can measure the forces involved (stylus in the groove) then we can design
a platter with such inertia wich should cure the problem.
My observation is that when the platter is on speed there is very litlle force needed to keep the platter in motion.
I also observed that many TT's have platters at around
10 kgr. Not exactly Dertonarms idea about the needed weight
but I somehow think that this is not accidental.

Regards,

Dear Nandric, there is a kind of "weight threshold" which in my experience divides the platters of turntables in the "men" and the "boys" - or the serious and the toys ...... sonic-wise.
All really "good" turntables I have heard in my life (and I have heard most all) did feature a platter weight beyond 30 lbs.
If one wants to use inertia and calculated slippage in turntable design, one will observe that it works better and better with increased weight (= usually more inertia). But besides that the higher mass has a lot of feedback resonance resistance ( by weight - and if clever designed by structural barriers).
Weight in platter is never a mistake - if your drive can handle it/can work with it to the best.
Cheers,
D.