Re: [CAD_CAM_EDM_DRO] selsyn motors

hllrsr@... wrote:

>Jon,
>They where recommended as a solution to a problem I am having trying to
>make a tracer attachment for my mill.
>I was considering a hydraulic tracer, but it was suggested that I use a
>spring loaded tracer attached to the selsyn transmitter as the master,
>and use the reciever to move the cutter so as to follow the contours of
>my pattern.
>Turbcnc would drive the master table (with the other table slaved to it)
>and at the end of the programmed search routine,the master and copy
>would rotate to the new surface to be traced/machined.
>
>Do-able?
>
>

Huh? How would the receiver move the cutter? These things barely can
move the pointer
on a dial without adding amplifiers. Why not have the tracer probe move
a shaft encoder or
swing a vane in front of proportional photosensors. That could drive a
servo amplifier or
a fairly simple circuit to drive a step/direction stepper driver.

Jon