Setting up the Spindle Speed (Manual Lathe) 

Dad left ma an old LeBlond 10 inch swing quick change lathe with no rpm tag on it. I guess I'll need to find an rpm meter and experiment with the lever positions and hope I don't break anything.

can you please make a video with all the workings. as in which are lever I,II,III, IV. and what is A2,A3,D3,C1?

thank you :)

In order to keep the cutting speed constant how the rpm of spindle should carry through the monitoring system?