Abstract :
VISITOR : Does the combination tracer head combine contouring with the other movement ? MR. FILLINGHAM : Yes. I have here the combination tracer head which actually combines the two movements, i.e., profiling and contouring. If the tracer point comes into contact with the template in front of the model it will continue to follow round the outline of the template. That is simple profiling. But it will also go in and out, over any impression of the model while going around the template, thus combining profiling with contouring. It is difficult to explain exactly how it operates¿it would be far easier to see the machine working to show you what actually happens.
