- Reaction score
- 13,475
Yes that's the disadvantage with modding the mechanics. These are collectible vintage pieces that some people like to have in original condition. I agree with Glenn that changing the drive ratio is probably the best way to alter the speed, but it might not be easy and must be 100% undo-able if the machine is not to be compromised.
So I also agree with the OP, that if it is possible to run by changing the motor frequency that is worth investigating. I am skeptical, because of the wide speed range. Only a good true-sine VFD would be worth considering. Speed stability, freedom from cogging and vibration, are all critical.
There are also other audio considerations to running the machine slower, it takes experience and understanding of the cutterhead and groove dynamics to get the best quality results from a record lathe especially when running outside the design parameters.
So I also agree with the OP, that if it is possible to run by changing the motor frequency that is worth investigating. I am skeptical, because of the wide speed range. Only a good true-sine VFD would be worth considering. Speed stability, freedom from cogging and vibration, are all critical.
There are also other audio considerations to running the machine slower, it takes experience and understanding of the cutterhead and groove dynamics to get the best quality results from a record lathe especially when running outside the design parameters.