|Bob Gaston posted|
Fel Bautista I'll bet the tool and die guys were going crazy making the master.
Noticing the stylus hanging at the left, I think he has already done a pass with that stylus on top of a model to turn a cylinder into a small radius on the right increasing to the full radius on the left. It is too bad they took this photo after all the fins had been cut. I would have liked to see it in the middle of a pass with only half the fins machined. That would make it much more obvious how the machine worked.
|Bob Gaston commented on the above posting|
Dennis DeBruler So the left stylus would follow the model on the top surface to control the z dimension while the right stylus would follow the model on the side to control the y dimension? The feed screw would control the x dimension. (Or do I have x and y dimensions reversed?)
[Actually, since these objects are round, the second stylus is controlling the rotation rather than a y dimension.]
Tracer Mills were the state-of-art before CNC (Computer Numerical Control) was developed.
Gary Gotschall I've worked arouind those tracer mills just a little and all I can say is thank God for 5 axis CNC mills...so much better. Progress.
A Google search for "tracer mill" finds several You Tube videos. But they are doing flat objects rather than round objects such as these turbine blades.