Turntable speed accuracy

Halcro, I can't think of a reason for a bearing to provide drag in a turntable- that seems like a Bad Idea to me. Are you sure the bearing is OK?

What style bearing is in the Raven? I remember reading about it some time ago... something about it being oil-less or not having an oil reservoir or something like that. Halcro?

There are a couple of different bearings used in this table, the latest version being different and older versions not upgradable. Well you could but you would also need a new platter.

The bearing in the BK has what looks like a ball bearing on the top.

Dear Halcro: You always can try a different thread's build material and see/hear what happen.

regards and enjoy the music,
R.

Halcro - great game eh. Looks like Dokovich has shown the others how to beat Nadal - ie hard and flat if they can maintain it.

Re the bearing, it's a bit of a red herring - I only meant to communicate that in the case of the Final there is high inertia such that if the motor is turned off and the belt/thread is still connected the platter will drive the motor/pulley for a few seconds.

Lewm's capstan is a good observation, the thing that interested me was that if you add a capstan and get more belt/thread on the pulley & platter it will spread the side loading on the bearings of the motor & platter. This would potentially reduce motor bearing wear.

Lewm,

That is a good point about belt contact with the platter. My SME 10 has about one inch of exposed/free belt before and after the motor pulley leaving the vast majority of the belt in contact with the platter. This is in great contrast to some other designs which have a motor on a remote platform 9" or more away from the record platter. Tables like the Walker, the Raven and the Micro Seiki all have a lot of exposed/free belt which is why some owners have switched to thread, I think.

I have not tried the Timeline on my SME or read of anyone else doing so, but the SME tables have a reputation for having pretty constant speed stability and accuracy.

I started this thread a while ago, and I appreciate all of the contributions to it. I have learned a lot. Thank you to all those who have participated.