Re: [CAD_CAM_EDM_DRO] :Re: digitizer arm

This kind of sensor wouldn't work very well on sculptures made of clay or
other "soft" materials.

Smoke
-----Original Message-----
From: dave engvall <dengvall@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Wednesday, November 15, 2000 9:37 AM
Subject: Re: [CAD_CAM_EDM_DRO] :Re: digitizer arm

>Alan Marconett KM6VV wrote:
>
>> Dave, Ballendo,
>>
>> A thread a few weeks back was talking about an electronic "center
>> finder". Which might benefit a little from this digitizing effort.
>> Could a strain gauge (or 2, or 3) be used as the sensor in a center
>> finder or digitizing arm?
>>
>> Alan
>>
>
>Certainly just the reverse of the ruggedized joystick used on some of the

military fighters. 2 D should be fine. 3 D might be a

>real problem.
>use a piece of 5160 ground rod at about Rc 50. I should think one would

want to be very careful about coming close to stressing it

>close to yield. .... but then if you do the strain gages will tell you. ;-)
>
>In 3D one would just load the end until it flexed..and in any case to get

repeatable results the servo would load the probe to a

>given stress everytime.
>
>Dave
>
>
>
>
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