Adding angles to a VAST XXT probe system.

[[Ja...]]

Hello,
It has been a while since I set up a VAST XXT system and I need more angles then just A0 B0.
Could I get a refresher?

Thanks

[[To...]]

Load the stylus system. Open the Stylus System Qualification window. At the top row of icons, towards the right end, there is an icon that will allow you to swivel your RDS to a desired position. At the bottom of that window, you'll find the A and B settings. Adjust the A and/or B to the desired angle. Then, click the icon to the right to "rotate the stylus" (Not Apply Angle button)

After it rotates, go back to the Stylus System Qual window and click the icon "Insert New Stylus". Name your stylus, click OK

[[Ja...]]

Thank you Tom
That worked.

[[Ed...]]

Hi Tom,

So  we name the stylus and press "ok", then we need to qualify the stylus correct?

 

[[To...]]

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Yes.  You can also create all of your stylus angle first, and then qualify them.  

[[Ed...]]

We are new to Zeiss in this lab. When we initially qualify a straight probe at A0 B0, that's actually all we need to do. We don't have to Qualify at A90 B90 or all other angles need, this is just a short cut, correct? And that's what this inquiry was about right? 

[[To...]]

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If you only need a stylus at A0B0, that's fine.  Some users need styli at different angles, so the above info is for adding those angles to your stylus system.   An alternative for some users is to create a CAA stylus system which automatically creates approximately 18,000 different angles with one defined stylus. The user uses the A and B parameters to define which angle is used.

[[Ed...]]

Happy Friday Tom,

Thank you for your responses.

Ok, that makes sense, cause we VAST XXT with RDS-CAA. I did not understand why someone would Qualify at different angles when the RDS-CAA does it for you. At least that was our understanding. 

[[To...]]

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The general consensus is the CAA qualification is less accurate than individually qualified angles, but "less accurate" is subjective based your accuracy requirements.  It might be just fine for you, but not the next guy.  In my opinion, if you need super accurate results, you should be using an active sensor such as VAST-XT Gold or VAST Gold.  These fixed stylus systems have been proven to be more accurate than the XXT, especially on an RDS.

Zeiss measures the each angular variation of the RDS mechanism and saves this information.  The RDS gets mounted on a CMM, along with the data from the RDS, and thru the Qualification, and the subsequent Fitting position of the MasterProbe at 12 different angles, then the actual stylus system, it calculates the remainder of all of the locations mathematically.  As opposed to rotating to a specific angle and qualifying it.  I usually recommend testing or comparing the results between the 2 different configurations.

Hope I got that right.

Edited March 21