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Home » Forums » Support » LEGO Laser Scan Station

Data Acquisition Card

Submitted by petewil2009 on Wed, 07/21/2010 - 12:19

We have been having some major trouble with our data acquisition. When we run it on a negative bias there seem to be no problems. However when we run a positive bias scan there seems to be no detection. Today we took apart the box and attempted to see if it was the voltage regulator. We determined it was not the voltage regulator due to the fact it is a positive bias voltage regulator (This is what I was told by someone who knows a lot more about electrical components than I do). So, does anyone either have any suggestions or is there a replacement box available? If so where can I get one and how much does it cost?

Thanks!!!

‹ Output voltages Scan Station Problem ›

new boxes

Submitted by cmarkum on Thu, 07/22/2010 - 12:58.

Peter,
This has been our major challenge this summer. Hopefully you'll be able to attend our conference call tomorrow morning to discuss this further. Jenny sent you a link so that we can all sit down and figure out the best way to go about solving this problem.

Craig Markum
University of Wyoming

This is what we got:

Submitted by petewil2009 on Thu, 07/29/2010 - 15:51.

To view these images just copy them into a blank web browser:

http://i30.tinypic.com/az7xx4.jpg

http://i27.tinypic.com/11qllw0.jpg

The first image is with a straight negative Bias using .35MNi, .35MCs, .35MFe and .35MCu. The second image was the same sample but with the leads flipped and the switch on the laser box was set to positive.

Dear Mr. Craig

Submitted by petewil2009 on Tue, 07/27/2010 - 12:57.

Dear Mr. Craig Markum,

Sorry,I was unable to attend the teleconference. We are however investigating the problem. It seems that we have acquired some good data by setting the bias to negative and then flipping the switch to positive on the box and flipping the leads.

Today we are using another data acquisition box to be able to compare our results of the flipped leads and alternative setup.

I will be posting the results.