Probe calibration error- tipdiam>.100

[Rob R.]

Hi,
I am trying to calibrate a probe tip, however I get an error.
The error is :tipdiam>.100
And the calibration fails.

How do I correct this?
I have tried changing my probe tool #, searched the
Manual, and the forum,but didn't find any solutions.

Any help in correcting this error would be appreciated.
I think I got the error because I originally calibrated on a flat tip (drill blank), and now I cannot seem to undo it.

Thanks
Rob

[DaveCVI]

Hi,

Hi,
I am trying to calibrate a probe tip, however I get an error.
The error is :tipdiam>.100

Is that the exact (word for word) message that is displayed?
If not, please take a screen shot of the error message so that I can see the actual error message.

I suspect that the error message is really:
TipDiamDelta > MaxDelta(0.100): check input params

In which case the software is complaining because the delta that was calculated for calibrating the effective probe tip diameter is way to large to pass it's sanity test. (A change in diam of 0.1 inches is way to large an amount to correct for cosine error caused by tip travel).
Check that the diameter value in the tool table for the probe is in fact the physical diameter of the probe before you try to run the calibration. Also check that you input the known diameter of the pocket used for calibration correctly.

Dave

[Rob R.]

Hi Dave,

Yes, that is the exact verbiage of the error. I couldn't read the error from a photo that I took of it... Poor photography skills:)
Thanks for clarifying that error.

The physical diameter of the probe matches the input parameter for the diameter of the probe tool.
Also, the round stock that I am probing diameter matches the input parameter being measured.


I have set this up once before, but it's been a while. I broke a ruby probe tip that got driven into my work and didn't get back into it.
I think where I went wrong was calibrating while using a flat tip stylus(a non-spherical tip). This was a mistake as I believe the calculation would be off, and now I'm ne'er stand and see this in the manual.
I have moved on and gotten myself a spherical tip probe and am currently using this stylus.

I think because I calibrated to this flat tip stylus(non-spherical), it is now giving this error when I use a proper spherical stylus. It's math is confused because of the added material (1 radial length), on the new stylus.

I am going to try and play with it more and try and fake it with math.

Cylinder diameter being probed is 1.000", but it reports 1.180"
Probe tip is .170" diameter


I hope this helps,
I will be working on it the next few days and will get back to you with a better email & more detailed information/observations.

Thanks,
Rob

[DaveCVI]

Reset the tool table diam to the measure diam of the round probe tip, then re-calibrate the probe.
FYI - MSM assumes a spherical probe tip - it does not support any other shapes. Using a non-spherical tip will result in measurement errors that will vary depending on the direction of travel vs the tip shape.

[Rob R.]

Cvi-msm

Thanks Dave,

The tool t150 diameter is set to the probe tip diameter, but I am still getting the error. I set the wear to 0.
It still generated the error with no calibration per your suggestion.

Here's some additional info:
I set my probe tip diameter to .170" as this should be the actual measured diameter of the spherical probe.
calibration diameter =1.000" round stock rod
Probe tip diameter=.170"
Wear=0

Tool is loaded via m6 command and identified as rh tool and is assigns as the probe. T150... Most of this is obvious stuff.

When I calibrate it will give me the error and not prompt for 'replace or average' options.
Test 1:
If I turn calibration off, and probe only, the 1.000" diameter stock will measure 1.170".

Test 2:
I can get it to not error and give me the option of 'avg or replace' values of I falsely tell it that the calibration diameter is 1.180", when it is really 1.000".
When I replace the value when prompted, and then try and recalibrate to try and increment my why into the actual value of the calibration diameter (without exceeding .100"). If I set the calibration diameter to then 1.060" it will error. 1.070" is as low as I can get the calibration diameter without it erroring while 'replacing' calibration values.

Issue: when I measure 1.000" rod, it measures 1.170". It seems to be measuring the rod and adding it to the diameter of the probe. My axis are accurate.

I hope this gives you more information to see if I am missing something obvious, or I got myself into some bug.

Thanks for your help.
Rob

[DaveCVI]

Odd, Ok time for a larger hammer....
I'll email you instructions for getting a debug trace. Turn on the logging and do the op that causes the error, then email me the log file. I"ll look and see what I can find.
FYI, I'm out of the office until next year, and I may not be able to look at the log file until after xmas. I'll see what I can do, but I can't make a promise re response time during the holidays.
Dave

[Rob R.]

Thanks Dave,

No rush. Enjoy the holidays.

I'll get you what I can when I get the password and generate a log file for you to review at you leisure.

Happy holidays,

Thanks again!!