[Ni...] Posted July 13, 2023 Share Posted July 13, 2023 Hello, So I purchased few M5 1.5mm x 57mm probes from zeiss website. I have it loaded on a Contura with an active head Vast XTR sensor. It is attached to a 60mm extension. I qualify at 100 measuring force and 40% probing dynamic. Every time I qualify the probe I get a sigma value of 0.0085mm I had a 2mm on this stylus system which would give me a sigma value of .0007mm I have tried using dynamic tensor to qualify and it still is extremely high. These probes are brand new. Barely arrived. I switched to the another new one and it is still very high at .0050mm. I switched the probing dynamic to 30% and it is now at .0037mm which is very high. I believe the max should be .001mm I switched back the 2mm probes i had before and the sigma value went back down to .0007mm Can anyone tell me why this is happening? is the 1.5mm too flexible? What is the purpose of selling them if they cannot be used? the 1.5mm probe of the same distance gives perfect sigma values on the Acura with a passive RDS head. Or did i get a bad batch from Zeiss store and need to return these and get other ones? Thank You, Link to comment Share on other sites More sharing options...
[Je...] Posted July 14, 2023 Share Posted July 14, 2023 Hallo, these probes are too flexible. I have a 47mm long 1,5mm probe also on a XTR, and the sigma is much to high, so I will change to a 2mm. Greetz Jens Link to comment Share on other sites More sharing options...
[Wo...] Posted July 14, 2023 Share Posted July 14, 2023 I think there is a big difference when qualifying with 20% dynamic. That being said, the longest 1.5mm that I have is 33mm and that's already not rigid enough. Among all my styli this one is giving me the most issues during qualification, and I don't trust it with tight tolerances. Wojtek Link to comment Share on other sites More sharing options...
[Je...] Posted July 14, 2023 Share Posted July 14, 2023 We are using a 3mm x 100mm probe with carbon shaft without any problems on our Duramax with XXT passive sensors. Our Accura with VAST XT doesn´t work correct with this. I´m down to 10% dynamic and it still makes trouble when scanning diameters. Single point measurement is no problem. I can´t explain why the VAST XT doesn´t work with them, it just has to. Link to comment Share on other sites More sharing options...
[Ni...] Posted July 15, 2023 Author Share Posted July 15, 2023 Please sign in to view this quote. So what do you do when you need to scan a feature or diameter that requires a 1.5mm probe? I have a 1.5mmx57mm on an acura and contura with RDS sensor and they qualify perfectly fine. Only the XTR is the one giving extremely high sigma values Link to comment Share on other sites More sharing options...
[Ni...] Posted July 15, 2023 Author Share Posted July 15, 2023 Please sign in to view this quote. I probably should of tried the 20% dynamic but i figured if 30% gave me around .0035mm, then 20% would of given me around .0025 which is still too high in my opinion. what do you do when you measure features that have tight tolerances? Link to comment Share on other sites More sharing options...
[Ni...] Posted July 15, 2023 Author Share Posted July 15, 2023 Please sign in to view this quote. I have the same issue. We have an acura and a contura with RDS sensor head. They both have a 1.5mmx57mm probe with a 35mm extension. They qualify perfectly fine and always give me around .0003mm Director wants the XTR to be able to run the same programs as the other two machines so i was trying to give it the same size and distance probes but it will always give me a sigma value of .008mm when qualifying on the XTR cmm. The 2mm on the XTR gives around .0007mm but the 1.5mm jumps to .008mm I don't understand if people are actually running their cmms like that. or what are they doing to make sure its good. Link to comment Share on other sites More sharing options...
[Je...] Posted July 16, 2023 Share Posted July 16, 2023 Please sign in to view this quote. Link to comment Share on other sites More sharing options...
[Je...] Posted July 17, 2023 Share Posted July 17, 2023 Please sign in to view this quote. I have interchanged the probes between the machines. Still the same. Working OK on two Duramax with XXT, don´t work on VAST XT. Measuring the same gauge ring with scanning and single point and single point VAST- Probing. Deviation about all this measurements on both Duramax machines less then 2 micron. On the Accura I have deviations up to 6 micron. Link to comment Share on other sites More sharing options...
[Wo...] Posted July 26, 2023 Share Posted July 26, 2023 Please sign in to view this quote. Link to comment Share on other sites More sharing options...
[Ri...] Posted August 2, 2023 Share Posted August 2, 2023 Can you use a stepped Ø1.5 probe? This is just an example, not 57mm length. https://shop.metrology.zeiss.com/INTERSHOP/web/WFS/IMT-US-Site/en_US/-/USD/ViewProduct-Start?SKU=626115-0151-030&ExtendedNavigation=true Link to comment Share on other sites More sharing options...
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