Re: Proxxon mill and touch probe

As yet I am not digitizing but I think turbo CNC allows you to do it
with a single command.

From the instructions:

*******************************************************************
************
G31 Probe move
************
Move with continuous check for digitizer probe strike. If the probe
hits something, the machines stops and write the position to the file
POINTS.DAT in the same directory as the executable.

Use G31 just like G01, e.g.:

G31 Z-4 F10

This will move to Z-4 at 10 ipm, unless the probe input goes active.
If so, it'll stop and write the tripped position to points.dat in the
current directory. You can use G31 to get off of the part again if
you need to, the program only accepts the rising edge as valid
input. Note that if you move twice in the same direction with G31,
you can smash your probe!

Manual probing: When the probe is "on" in jogging mode, every move is
like a G31, except that the points are not written when the input is
triggered. Use "F" to write a point anytime. This is mainly for
tinkering and testing the probe geometry, although clever folks might
figure out how to make a teachable CNC using this feature.

*******************************************************************

Turbo CNC is ace!

To me it seems anyone who might need one should be able to build
one. If it is does work I will provide my drawings an possibly gcode
for those who don't want to reinvent the wheel. That said my design
is optimised for making on only a mill. With a lathe and with a
dividing head you could make a better rendition.

cheers,

Graham

>
> No, I never built one. We had had a long thread on what
> commercial digitizers must look like inside, and I just fleshed
> out some ideas that others had explained. If the design works, it
> should be pretty inexpensive to duplicate, even in small
> quantities. A custom PCB for the contacts, debounce circuitry,
> and maybe an LED indicator, would finish off a nice product. I
> wouldn't mind one myself. I'd be happy to produce drawings of the
> parts in exchange for components.
>
> BTW, what software are you using for digitizing?
>
> Regards,
>
> Carlos Guillermo
> VERVE Engineering & Design
>