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Laser trigger Output Family
« on: December 03, 2011, 12:01:48 AM »
Hi,

I have a Wenglor height sensor HN 24 MGV, that will give me a height measurement based on a 0-5v signal. I want to use this in conjunction with the laser trigger output family, to get a point cloud xyz measurement. I am thinking that I can log height (Z) by capturing the the signal from the Wenglor sensor, but need to combine this with x and y location. I use Rhino so once I have values I can input direct into Rhino to generate point cloud scans of any object that will fit on my machine. Does anybody have any ideas on how I can capture and combine.

Dave

Offline Tweakie.CNC

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Re: Laser trigger Output Family
« Reply #1 on: December 05, 2011, 07:59:34 AM »
Hi Dave,

I am not aware of anyone using these analogue type of sensors (they are usually binary) so you may be pioneering new ground here. Interesting devices nonetheless and I would be most interested in hearing how you proceed.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline BR549

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Re: Laser trigger Output Family
« Reply #2 on: December 05, 2011, 07:55:09 PM »
Long ago I tested a routine that used a laser rangefinder.  You can do it as a probe routine but not as an on the fly routine. The Mach interface is not fast enough at 10hz.

You would need an analog to digital convertor to get a value into mach. Or a simple PLC maybe

Then use the G31 routine and let a set value from the LRF trip the G31 then use the Z axis value as the height offset.

That way you can use the XYZ Points generation M40/41) to create the Pointsfile as an auto function (no extra programming needed) and very dependable.

It worked very well back then but teh unit I tested with was not that accurate(lowbuck) just did it to test teh theory.

Just a thought, (;-) TP