Error calculating deflection matrix

Hi all. Fairly new to the forum. If someone could help, I would appreciate it. I am getting an "error calculating deflection matrix" when calibrating my 4x20 cylindrical probe. I have a TesaStar-SM using a Leitz scanning probe head. See attached >jpg of probe build and error. Calibrated last time 3 months ago and calibrated fine.

Bob

Attached Files

Josh Carpenter over 10 years ago

This message usually means that:
1) You chose to take less than the required 23 points,or
2) Your in-real-life probe build does not quite match you virtual probe build, or
3) Your Leitz probe is internally damaged.
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WolfMan over 10 years ago

http://www.pcdmisforum.com/showthread.php?26802-HELP-error-calculation-deflection-matrix&highlight=deflection
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CMM_DUDE over 10 years ago

Thanks Josh. I calibrated using 26 points. Is there a way to tell if the probe is damaged? all of my other probes (4 other probes) calibrated with no issue.
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CMM_DUDE over 10 years ago

thanks Wolfman for the link. I am using probe rack to change probes. what I saw on that thread shouldn't apply to me unless I am missing something.
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Schlag over 10 years ago

We have this issue ALL the time with our shank probe. All 8 of the other probes in the rack calibrate just fine.
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CMM_DUDE over 10 years ago

I found a reply by Josh carpenter in this post (06-60-2011 "error calculating deflection matrix" ? please help) and it calibrated fine now.

"The software is telling you that something's wrong, we just have to find out what it is.

I get that eror when the discrepancy between nominal and actual is way too big for the deflection matrix math to resolve. I typo'd

Do you have a loupe to examine the ruby? 0.3 rubies break when you breath on them, so fragile.

Could be a loose connection too, a wobbly probe will flunk the matrix.

Also, make sure you have the correc Opt Probe statement before the LOADPROBE command."
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CMM_DUDE over 10 years ago

Schlag,
Check to see if the OPT probe statement is before the load probe command. It worked for me.
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WolfMan over 10 years ago

thanks Wolfman for the link. I am using probe rack to change probes. what I saw on that thread shouldn't apply to me unless I am missing something.

I also was using a rack. The answer is inside the link. At least it worked for me. Read it all the way to the end.

Trap calibration fixed the issue I had
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