Re: [CAD_CAM_EDM_DRO] Re: 3D Scanner/ Dizitizer

On Sun, 18 Apr 2004 19:53:36 -0000, you wrote:

>Hi,
>
>I have been looking at ways to speed up digitizing, as using a a
>probe is so slow and really wears out the z axis if you are doing a
>lot of deep or large objects.
>
>I have hand held laser measuring equipment which Might do, it costs
>around £250 uk pounds.
>
>I have taken it to peices and was wondering if anybody on this site
>would now how to tap into the information that is sent up a flat
>ribbon conector to lcd digital readout. If this can be done it would
>be easy to divert the signals to the pc witha simple connector.

If the LCD has the standard two controllers on it, you will find that
the device acts like a memory location.

It will probably have either 4 or 8 data lines, a read strobe, a write
strobe (or a R/W- line) and a select line. The select line must be
down for the data to be available.

Paralleling something like a 74HCT374 across the data lines, then
adding another latch that records the state of the R/W- line, and then
activating that with the R or W strobe should be fine.

You'd need the exact manufacturer's data on what lines are what, but
that would do nicely.

You'd end up with a few flipflops and probably a little programming in
a microprocessor, or perhaps just a little programming in a
microprocessor.

Harvey

>
>I will attempt to post some pictures in the photos section.
>
>Thanks
>
>Remo.
>
>
>
>
>--- 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
>
>
>
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