>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]]
>Sent: Wednesday, August 08, 2001 1:03 PM
>To: [email protected]
>Subject: board scanning on the cheap (sort of)
>
>
>
>With all this talk about visualization, I thought I'd toss in my bit.
>
>Here at Datex-Ohmeda we have a small NC mill sometimes used by the R&D
>group to make small prototype parts, but it often sits idle.
>Since I have
>a spectrum analyzer and a variety of small dimension H and E
>field probes
>I've built, I thought it would be interesting to build the
>equivalent of an
>EMScan. The control program is being written in LabVIEW and is coming
>along pretty well. One nice thing about the mill is that I
>can program the
>scan height for any rectangle I define, so tall components can
>be hopped
>over. When it's all done, I should be able to play a frequency swept
>"movie" of the board on an intensity graph. The cheaper way to do this
>would be to find an older X-Y plotter and skip the height
>variation. If I
>ever get the beast done, it will be open source to LabVIEW users.
>
>Best regards,
>
>Brent DeWitt
>Datex-Ohmeda
>Louisville, CO
>
Brent:
That sounds like a good project. But.... what about the conductive /
reflective effect of that big spindle? Maybe you should mount any probe on
the end of a long, stiff non-conductive rod. Assuming that you can crank the
table down pretty far, you might be able to chuck an 18" rod in the spindle.
Regards,
Ed
Ed Price
[email protected]
Electromagnetic Compatibility Lab
Cubic Defense Systems
San Diego, CA USA
858-505-2780 (Voice)
858-505-1583 (Fax)
Military & Avionics EMC Services Is Our Specialty
Shake-Bake-Shock - Metrology - Reliability Analysis
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