Re: [CAD_CAM_EDM_DRO] Re: digitizer arm

Alan Marconett KM6VV wrote:

> Dave, Ballendo,
>
> A ground 5160 (stainless?) rod at Rc (Rockwell?) 50; so the strain gage
> would be ON the rod? I was guessing it could be between rod and a tip?

5160 is a nice spring steel and yes the strain gages would be on the rod.

> You mentioned a dial indicator. If one could connect a dial indicator
> hand to a shaft encoder... or how about the little glass opto-sensors
> used to sense head position in some (old?) hard disks I've seen?
>

I used the dial indicator only for visualization....the lvdt is the better solution. IMO no mechanical system is going to very good in
Z. The optical or ultrasonic stuff would work better.

Dave