[Lu...] Posted February 26 Share Posted February 26 I recently purchase a tiny star probe, to be able to reach into an inner diameter groove. Basically a C-clip groove. Trying to measure without destroying the part. 4 probes @ .5mm ball Ø. I'm trying to understand, if possible, the basics of creating a new smaller Reference Sphere. So that I can calibrate the tiny star probe. I have an extra small 16mm sphere that is used for one of our non-Zeiss CMM's. The Zeiss factory sphere is too large. It cannot complete the 180° calibration. Shaft lengths preclude it from full calibration. I have tried looking for instructions in the Help. As well, tried searching "probe qualification", "small Ø probes", etc. To no avail. Would be great to get some help, or a how-to instructions. 18 years of programming and I've never had to use a different type of sphere. lol Thanks Link to comment Share on other sites More sharing options...
[Ca...] Posted February 26 Share Posted February 26 Hi Luis, You can input a new reference sphere into CALYPSO by following these instructions: https://portal.zeiss.com/knowledge-base?id=567033 The 16mm reference sphere, though, may not be small enough. If you need a smaller reference sphere, here is a link to an 8mm reference sphere: https://shop.metrology.zeiss.com/INTERSHOP/web/WFS/IMT-US-Site/en_US/-/USD/ViewProduct-Start?SKU=600332-8443-000&CategoryName=460110&CatalogID=400000&ExtendedNavigation=true Link to comment Share on other sites More sharing options...
[Ch...] Posted February 26 Share Posted February 26 Hi Luis, for smal Radius Probes we change the sphere coverage(angle) maybe 90°-100°, also the probing force an dynamic. Link to comment Share on other sites More sharing options...
[DW...] Posted February 26 Share Posted February 26 Please sign in to view this quote. Please sign in to view this username. You are going to need the Zeiss 8mm sphere to do 180° coverage on a 0.5mm probe. Please sign in to view this username. is correct you can decrease the coverage, which may work in your situation. Also do you have the original certificate for the 16mm sphere indicating its actual size? If you do not know its actual size, placing "8mm" in the reference sphere management sphere radius is going to give you trouble with accurate measurements. Link to comment Share on other sites More sharing options...
[Mi...] Posted February 26 Share Posted February 26 Decreasing the coverage only works on XT machines FYI, XXT will always scan half the ball. Depending on the machine you have, I'm not sure the 16mm ball will work. I bought an 8mm ball for this same job type. How much time did I waste on that in the early days.... Link to comment Share on other sites More sharing options...
[Lu...] Posted February 26 Author Share Posted February 26 Good info. Thanks everyone! Link to comment Share on other sites More sharing options...
[Cl...] Posted February 26 Share Posted February 26 Please sign in to view this quote. On one of our Conturas with an RDS/XXT. One of our other programmers built a 0.3mm very short stylus. It qualifies on an 8mm sphere. It scans at 180° and shanks the shaft behind the probe tip. That cannot be changed. You can reduce the coverage so when it takes the six points (Geometry Requalification) directly after the scan it won't shank. Since the scanning portion calculates the bending parameters, should it even matter that it shanked? The stylus qualifies just fine. It's also used in several programs that have easily passed a type-2. Link to comment Share on other sites More sharing options...
[To...] Posted February 26 Share Posted February 26 An 8mm reference sphere may not work. The distance from tip to tip is 16, meaning the distance from center to center is 16-0.5 or 15.5. The diameter of the hub is 8mm which means the distance from the center of one tip to the hub is 3.5. This means the hub could potentially hit the sphere when the probe is at the equator of the ref sphere. I created pic below for another application but it shows the issue I'm trying to explain Link to comment Share on other sites More sharing options...
[Cl...] Posted February 26 Share Posted February 26 (edited) Calc_Sphere_Coverage.xlsmCalc_Sphere_Coverage.xlsm I got this from someone in the forum years ago. Edited February 26 Addition Link to comment Share on other sites More sharing options...
[Da...] Posted February 26 Share Posted February 26 I use a 6mm probe as a reference sphere and it works well. Link to comment Share on other sites More sharing options...
[na...] Posted February 26 Share Posted February 26 Please sign in to view this quote. How do you mount it, can you share a picture? Link to comment Share on other sites More sharing options...
[Ma...] Posted February 27 Share Posted February 27 It could be calculated, but missing crucial dimension ( missing dimension: 3.? ) Link to comment Share on other sites More sharing options...
[Ün...] Posted February 27 Share Posted February 27 GearPro I use Ø0.5 probe for gear measurement, I use Ø8 sphere for this. I have not had any problems. I also use the sphere in a 180º upright position Link to comment Share on other sites More sharing options...
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