Re: [CAD_CAM_EDM_DRO] Re: CNC Etch-A-Sketch, EggBot

What I'm saying here is the probe would look like a flat needle with a round
pin thru it at some point. this pin would be a rotary axis (like an axle).
The probe end would then rotate about this point (axle). The opposite end
of the probe would have some sort of measuring device for measuring the
angular deviation. We built a similar mechanical gadget at school for
measuring shotgun bores.

Calculations would only require using be standard trig functions in a single
plane.

The unit would digitize along a specified length, shift a specified amount
in the Y direction and repeat as many times as required until the entire
specified area was digitized. This is pretty much exactly what the
digitizer on the MAXNC does....except I have no idea how the innards of it
functions.

IMO attempting to build a radial device that would measure two angles at
ones would be a lot more than what's required.

I never heard of a "compliant" pen before. What the heck is that?

The only "compliant" pens I have are manual ones that haven't run out of ink
yet. :)

Smoke

> Hi Gordon,

A "compliant" pen mount

> could also "draw" on the egg.

> I didn't ketch how you were going to "sense" on the probe's pivot.
> Deviation on a probe tip would be simple trig calculation from the angle
> that is sensed. Radial angle of the 'Z' axis would be a little
> different approach!
> > Alan KM6VV
>
>