Turntable weight affects speed

Oops, first response wasn’t showing up

The weight is 291g (10.25 oz).

the tt was designed by Acoustic Signature, and is very similar to theirs, at the time. AS sells weights c. 280 g.  So it seems like the ps should be adequate.  Unless… the weight is c. 1 oz too heavy?

so if I understand correctly, @jea48 explained that the ps should just increase current to maintain the speed.  So @noromance must be right, it has to be belt slippage? - which shouldn’t happen.  That belt is small and flimsy

The weight is 291.6 grams.

so, @jea48, the speed should not have been affected by additional weight?  The power supply (claimed to maintain exceptionally accurate speed - designed by the Acoustic Signature designer - they seemed to use the ps on platters of various weights) should have just increased its current and maintained the speed?  So this was probably caused, as @noromance suggests, by belt slippage?  

it’s an unsprung, 46 lb tt, eliminating vibration sufficiently was a challenge; I thought a weight might contribute to the solution

Thanks for all the well-considered responses!  I’m planning to try the Origin Live Gravity One @mgolpoor recommended. 

And, to cover as many bases as possible, I’ll order a new belt. 

A new bearing/turntable… not today. 

trying to be more diligent about updating threads.

Further research located an old review of this tt by M Fremer which said there is an internal potentiometer for adjusting speed.  It was not referenced in the manual. So I bought the RPM Pro app, opened up the power supply box, made some adjustments: problem solved.
  But went ahead and ordered a belt and OL tt “weight”.  The app said the wow and flutter was .25, a little higher than desirable. 

Thanks to Michael Fremer and all the ideas on this thread.

Agreed, increasing the load might be detrimental. Lightweight Origin Live “weight” is on the way. 
 

thanks for all the ideas.