What kind of constrainst would be acceptable to make things easier?  
examples:  each cut in y-z plane --  all cuts are in z and a rotary axis 
about x or y.   This would allow probing in front of the cutter. 

How irregualr is the pre cut surface?  The concern her is: if one were 
to make a rolling or sliding hieght sensor, what kind of bad things 
might it encounter?   A sensor to roll or slide over surface in front of 
the cuttong tool could be cheaper to implement.

craig


ScottV wrote:

>>I would like to automate the cutting of objects found in nature that are
>>roughly spherical and vary in radius. What seems to make sense is to
>>issue a G code command to make the cutting head move until a limit
>>switch is triggered on the surface of the object; disable the limit
>>switch; use relative motion commands; repeat.  Has anyone encountered
>>anything like this? Is there a way to do what I'm attempting without
>>scanning the entire object first?
>>    
>>
>
>I was trying to imagine what kind of cuts and figured they'd be grooves of
>a particular depth that followed the contours of the surface.
>
>If so;
>Change the Z axis control into a spring loaded linear sensor that is
>mounted on a collar around the spindle that places the sensor in the
>direction of the cut? You'd need another axis to control the collar and
>would have to manually start the cut to get it to the proper depth. But
>then it would follow the varying Z of the surface as long as the sensor
>didn't get hung up.
>
>Okay - not easy but the "in the box" ideas were all ready posted.
>
>ScottV
>
>
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