Re: 3D Scanner/ Dizitizer

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "ruanb1" <rrbasson@t...>
wrote:

> Hi Guys
>
> Just an idea, I am thinking off. It sure would be nice to be able

to

> have a scanning system (affordable) without the contact like the
> probes.
>
> I was thinking: Can one not use the distance sensors (which is
> cheap) mounted on the axes to fulfill this, I mean we basically
> would just like distances, and with software then create the
> models???
>
> Have any of you thought in this line or build something like this

on

> your CNC machines?
>
> It surely would not break the bank (although it might be hell of
> slow scanning).
>
> Would appreciate your ideas
>
> Regards
>
> Ruan

Take a look at:

http://www.hvwtech.com/pages/products_view.asp?ProductID=347

Infrared (pulsed) short distance sensor. They have several models.
Serial (RS232) output feeds back digital value of analog distance or
one model has adjustable trip point and just sends back a single bit
logic level.

The challenges are to get past the different reflectivity of an
object and to determine the accuracy and repeatability.

Ambient light is not a problem due to the module having it's own
infrared output and it being pulsed at a frequency that is detected
by the same receiving module. It uses a focused beam and receiver at
angles so it can only operate in the area of convergence.

Price is right (<30 bucks) if it is usable.