Recently got an older Delta lathe with working original DC drive/controller. Just started using it and my question is this. Do DC motors/controllers make different "noises" compared to reeves driven variable speed lathes?
example.....running at ~600 rpm or higher and no load on lathe (not cutting with a tool) the motor changes pitch in a noticeable difference. I do not notice at lower speeds.
I do not think it is a bearing noise per se. This lathe does not have the jack shaft so basically it is direct belt drive from motor to headstock. Could that be the source of the whining noise.
thanks