Re: [CAD_CAM_EDM_DRO] Laser DRO ??

Hi guys;

As an example of the resolution/speed problem, lets take an RF signal. Under
the most ideal conditions you need a minimum of 8 modulated carrier cycles for
the modulation to be recognized. That's straight on-off digital signal
modulation, and it requires more for a sine wave type of modulation. If, as
was mentioned in another post, the mouse mechanism works at around 1KHz, then
it's automatically much too slow for any kind of reasonable CAM/CNC work. Now
if there were aome mouse hardware that worked in the several MHz region, you'd
have something, but that's not the case, _yet_ anyway.

Bill

On Tue Apr 2 14:20:28 2002, Jerry Biehler, <j.biehler@...> wrote:

>On Monday, April 1, 2002, at 06:42 PM, Bill Vance wrote:
>
>> On Mon Apr 1 17:21:47 2002, baccus61, <rich5886@...> wrote:
>>
>>> Hi gang,
>>> I have been reading with interest all the posts on the digital
>>> readouts and just had a thought. Has anyone thought of using the
>>> laser mouse for a cheap DRO? These work on almost any surface and
>>> seem to have a fair resolution but would the resolution be great
>>> enough for the task at hand! I have one pulled apart that was fried
>>> in a power surge (along with the rest of my computer) and there
>>> isn't much to it.
>>> Just a thought and what do you all think?
>>> Rich.
>>
>> Two things; Speed and resolution are working against it. That's not a
>> laser
>> problem, but a sensor problem.
>
>Actually there is no laser in these mice. Just a high intensity LED.
>There have been people that have replaced the red led with blue ones.
>Though with less sensitivity. (The CCD is filtered for red.)
>
>-Jerry
>
>> Last I heard, there's no sensor diodes, or
>> transistors, etc., that are up to doing the speed needed for super high
>> resolution, and the resolution itself returns less and less signal
>> strength, the
>> tighter the resolution gets. From what I see from time to time, that's
>> something that continues to improve, but needs more work to catch up.
>>
>> Now that's not to say that lasers/sensors ar unusable for our purposes,
>> they
>> patently are. However, buy mouse crap, get mouse crap.....:-)
>>
>> Bill

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