Quote Originally Posted by i2i View Post
I have a question, what type of bearing are you going to use for the turntable. It will need to be supported over the whole surface and have extremely low noise levels, so low in fact that you may have trouble engineering it. Forgive me if i'm reading too much into this, but to cut a record involves physically cutting a groove in a disc. So the turntable have to be rigid to avoid any deflection when cutting and have no bearing noise (wow and flutter).
I suspect the cutting forces will be quite low (is any data available?) so you can, to some extent, substitute mass for rigidity.

For the turntable I'd think that a spindle supported on some decent quality bearings with a platform above it and then the turntable itself above that supported by some noise absorbing material would work quite well. Most of the mass should obviously be in the top part.

Drive could then be to the spindle via a belt to isolate motor noise. A bit of tuning of the feedback loop should give you good wow (low frequency speed variation) response and the mass should sort the flutter (high (relatively) frequency speed variation) out.

Sounds easy :lol: