Automatic Disk Probe Qualification

[[Jo...]]

Hi All,

First thing, I like the concept of the disk probes in certain applications. I dislike the qualification method...

Unfortunately, my company cannot get away from disk probes due to the need to get into hard-to-reach undercut features on multiple components. 

 

This leads me to my first question: Has anyone been able to create an automatic disk probe qualification program? My thought would be to have it ran through Autorun by an operator. 

My guess would be that this would run using a ring gage (as normal) and use PCM to update the nominals of the probe. Does anyone know what commands I would use to modify probe data?

If anyone has had any luck or would be able to share a guide that would be huge. 

 

Thanks in advance!

Edited April 21

[[Cl...]]

What head are you using. If it's an RDS/XXT a quick search on the forum will give you a detailed disc stylus calibration instruction.

[[Ri...]]

While it is possible to do, I was told to not do it because you run the risk of an issue during the writing to the SDO, and then you could cause a significant collision. 

[[I...]]

you change it manually anyway:  

 

setNewRadiusToActualProbe()

 

[[To...]]

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You'll probably want to adjust X and Y values, too.

[[I...]]

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setNewGeoStatToActualProbe(x,y,z,i,j,k)

 

[[Cl...]]

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For what it's worth. Before we got our second Contura with the VAST XT Gold. We had an RDS/XXT using

the disc stylus instruction found here on the forum. It worked well enough to pass a Type-2 Gauge R&R. 

[[RP...]]

 

[[To...]]

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Please remember, this is NOT a  Zeiss supported procedure. Run at your own risk. 🙂

[[Jo...]]

Good morning all,

Thank you for the replies! I just got back from much needed vacation in FL!

 

To answer some of the questions above. I am using a Vast XT Scanning head on a Prismo Navigator. 

 

Reading through the replies, it looks like it is not recommended to update the stylus data via PCM. Due to a high risk of a collision, this doesn't sound like something that I would like to pursue. That's too bad, though, I was hoping someone would have some experience writing an automatic cal program. 

Nonetheless, thanks for the replies all!

[[Cl...]]

For what it's worth. We ran the "Non-Zeiss" procedure for disc probes for years with an RDS/XXT and never had any problems.

[[Ri...]]

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You can still write a program that will give you the necessary offsets to correct your stylus, you would just need to manually make the changes. 

I have a program that performs a stylus check (mainly used for Ts and Stars to ensure that there are no offsets), and gives the necessary offsets to correct them. 

[[Jo...]]

Yeah, I might still make a semi-automatic cal program for the operator to verify. 

I was just hoping for a program that would do it all and be usable by the operators. I just don't trust them to manually correct any offsets.

[[Ll...]]

'First thing, I like the concept of the disk probes in certain applications. I dislike the qualification method...'

I agree. Before using Calypso I always qualified disk probes with a sphere. Has anyone done this? I found it reliable. The method took points at the equator and then points ±.010 from the equator. This routine would be run twice for better accuracy. Is this possible with Calypso? Has anyone tried anything similar? Would anyone recommend it? I would like to use a disk in my current program.

Edited May 5

[[Cl...]]

Qualifying disc probes using the ref sphere is standard with active scanning heads.

[[Ri...]]

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I am doing that except I am scanning 3 lines based on disk thickness less 30% to avoid edges of the disk.

I scan the reference sphere and adjust for X,Y,Z and radius.

Then I scan a circle recalling X,Y,Z for the circle location.

If the Sphere diameter and the circle diameter match to a percentage (90%), I consider it an effective qualification.

The Delta is the difference between the Sphere and the Circle. (In this example the Deltas are out to 6 decimal places).

(Ignore the tolerance for the true positions, it's just a value. The tolerances are much lower in an Excel file).

XXT Disk Probe Combo76R Setup 25mm Ref Sphere_5x__25.05.02_2025-5-5_9_21_52 AM.pdf

[[Ll...]]

'3 lines based on disk thickness less 30%'. This makes a lot of sense and I may have done something similar. (It has been almost a decade since I last calibrated a disk probe in the above mentioned manner. Here we use very few and they are qualified using ring gages.) I want to explore using the qual sphere with Calypso to make it easier. Calypso is vastly different. Can anyone point me to instructions for qualifying a disk with a sphere? I reviewed the attached report and I am not sure what you're doing with the delta 1-5's. I do not know how to qualify a probe in Calypso other than using the canned routine which, to my knowledge, will not work for a disk. Any advice is appreciated!

We have active heads but this is for an XXT passive head.

Edited May 5

[[Ri...]]

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This is old and probably not the same as I use now. But it could get you started if you want to dive into it.