Probe Cal.

[Clay_Man]

Good Morning all

I was just wonder what people use in the set-up window for probe cal. under setup
"Give a warning when the diameter error for the probe tip is more than:" ???
3.7mr2 cad++

Thanks

[Matthew D. Hoedeman]

That will depend a lot on what you are using to hold the probe. Different usints (TP2, TP20, TP200, etc.) all trigger a little differently from each other and will have different calibration characteristics (sp). I use a TP2 and use 0.01mm (0.0004") for the SD of the calibration and 0.15mm (0.006") for the actual size. The SD (standard deviation) is basically a 'roundness' value for the results of the calibration. The SIZE of the tip is not as critical since THAT will depend on the TP unit type (or other unit), touch speed (which should be the same as you use in the program), and actual SIZE of the tip (and they DO all vary). However, if it checks ROUND, then you are much better off than if it checks within 0.0004" for size and 0.006" for roundness.

[slinky1561]

Probe Cal.

I personally use .01 for the Diameter error, and .01 for the Standard Deviation. If I do get errors on a cal of .015 etc, I check the results for all the angles and look for concistancy across the board. This would tend to indicate that the Stylus tip is not perfectly sized. just because the tip is said to be 2mm, it doesn't mean it is exact!!

[slinky1561]

The SD value is the Standard Deviation of the Sphericity of the tip. PCDmis uses the term SD for standard deviation, but it isn't true SD.

[John Kingston]

I personally use .01 for the Diameter error, and .01 for the Standard Deviation. If I do get errors on a cal of .015 etc, I check the results for all the angles and look for concistancy across the board. This would tend to indicate that the Stylus tip is not perfectly sized. just because the tip is said to be 2mm, it doesn't mean it is exact!!

Are you using inches or MM?

[tking]

John,

He's in the UK! (my guess mm).

Pok'in fun at ya,

TK

[Snaggy]

0.005mm, but only because we do high precision stuff