I had this with a turntable - I needed to clean and re-grease the bearing.
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Could it be anything to do with the bearing issue in this review?
https://www.tnt-audio.com/sorgenti/acoustic_solid_machine_e.html
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Ah now that makes sense. Will try that, Cheers.
It’s a thin rubber band. 38 euro thin rubber band to be precise, because HIFI.
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Thank you, lots to go at there. The top half is kept fairly clean, I suspect the bearing needs a clean and re oil. Will try all of your suggestions though, thanks.
I’ve got an Acoustic Solid too. I’ve found that unless it’s absolutely level you will get audible speed fluctuations.
How bad are the ones you’re experiencing?
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If the bearing is as snug a fit as suggested by that TNT-Audio review then I can quite imagine temperature fluctuations at home causing an issue. Certainly would in our house.
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Not that bad. The wall shelf is a suspension jobby and does get out of flat after a while. The tensioners have to be wound in. Will check those again, as it’s been a little while since I did it.
You need to let the lamp under there gently keep the bearing warm 
(a la Brinkmann)
Haha it’s probably warming the belt too! doh! It’s a proper bulb for 50hz reasons. I’ll move it.
The trouble is, the issue is so rare, but it’s just enough to make you look up, with a look on your face.
The fact that it’s a rare occurrence sort of indicates motor/psu rather than some ongoing mechanical issue.
yes, that makes sense. Oh well, best delete this thread quick so I can sell it 
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I used to rinse the rubber band with a little bit of washing up liquid quite regularly as it would get quite dirty and cause occasional slippage.
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If its a cap going south its a simple fix.
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You can if you’ve got a Vestax VRX-2000.
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