[An...] Posted July 17, 2024 Share Posted July 17, 2024 We are adding a four sided star probe to our arsenal and have ran into a snag when qualifying the Z+ position. Our reference sphere points up and out 45°. Similar to the one below. https://shop.metrology.zeiss.com/INTERS ... ation=true This won't work for qualifying Z+ since it runs into the shank. My thought is I have to go to something like this https://shop.metrology.zeiss.com/INTERS ... ation=true Does anyone have an alternative? Thanks in advance! Link to comment Share on other sites More sharing options...
[Mi...] Posted July 17, 2024 Share Posted July 17, 2024 Standard RSH Sphere adjusted down to 120° instead of the default 135° should let you calibrate +Z Probes we do it everywhere.. XXT and XT. Link to comment Share on other sites More sharing options...
[To...] Posted July 17, 2024 Share Posted July 17, 2024 Please sign in to view this quote. can you post a pic of your stylus system? Link to comment Share on other sites More sharing options...
[An...] Posted July 30, 2024 Author Share Posted July 30, 2024 Attached is my setupPXL_20240730_142648648.jpg Link to comment Share on other sites More sharing options...
[Mi...] Posted July 30, 2024 Share Posted July 30, 2024 Same as us except ours is XT/XXT direct ( same probe system in both versions) Adjust that RSH Sphere down to 120°, put the Rotation at 0°( or 180° depending on which direction it's facing) and it'll calibrateQuadStar 2.PNGQuadStar 1.PNG Link to comment Share on other sites More sharing options...
[Ri...] Posted July 30, 2024 Share Posted July 30, 2024 There is also a 6mm bolt on the back of the RSH that will allow you to rotate its "head" which will allow you lay the Reference Sphere over to 90° of tilt. This will give you the option to qualify all of those tips with one Reference Sphere position. You will need to rotate the base though to make it parallel with the XXT. Link to comment Share on other sites More sharing options...
[To...] Posted July 30, 2024 Share Posted July 30, 2024 If you're going to move the angle, I'd go all the way to 90°, like Richard said. The setting for this would be Tilt: 90 Rotation: 0IMG_0123.jpeg Link to comment Share on other sites More sharing options...
[To...] Posted July 30, 2024 Share Posted July 30, 2024 Please sign in to view this quote. I'm guessing you'd be a wee bit over 15 grams on this one. 😃 Link to comment Share on other sites More sharing options...
[Mi...] Posted July 30, 2024 Share Posted July 30, 2024 Please sign in to view this quote. Yes but only one of our machines actually has the fully built left and right sides of that system and it's calibrated constantly. Most of the production machines only have the left or right set of probes, and even then they often only half a couple of them. In simulation I program with complete stylus systems so I can move programs around to different machines and never have surprise crashes because I didn't account for a probe that isn't there on the original machine, but is present on another the program may get moved to. 90°/0° is absolutely better for that +Z Probe. The reason I said 120* and not all the way down to 90* is the RSH sphere is harder than it needs to be to adjust. 120* will let you calibrate all your regular probes on a standard star, and a +Z probe. So the tilt never has to change, just rotate the sphere, remaster and continue calibrating. Link to comment Share on other sites More sharing options...
[An...] Posted July 30, 2024 Author Share Posted July 30, 2024 Is this what you mean by 120°? I have threads on top pointing Z+, Threads facing up and out 135° and the position shown in the attached picture.PXL_20240730_171243076.jpg Link to comment Share on other sites More sharing options...
[Mi...] Posted July 30, 2024 Share Posted July 30, 2024 No. You were originally at 135°, 120° is only down a bit. That's an RSH Sphere, do you actually use the RSH function? It makes adjusting the sphere position so much easier. One of my favourite discoveries when I was new.Picture1.png Link to comment Share on other sites More sharing options...
[An...] Posted July 30, 2024 Author Share Posted July 30, 2024 What we have done for the last 12 years is have the reference sphere at 135°, put it 45°X+Y+ on the CMM to get the majority of our qualification program and swivel 90° to get the rest. So we do use the RSH function but in a very limited scope. This four sided star is the first time we haven't been able to get everything needed with the method described above. We have a second reference sphere in the lab, I am working on combining them into some combination so that we can get every position needed, see attached.PXL_20240730_181631101.jpgrhs.JPG Link to comment Share on other sites More sharing options...
[Mi...] Posted July 30, 2024 Share Posted July 30, 2024 You're actually not using the RSH, it's greyed out "RSH Shaft Definition". I suggest you set it up as it'll make this job you're doing easier. It's a built in way to make the CMM measure the Sphere tilt and rotation. Make a new sphere with the correct RSH components Then you can do this and get your angles exact. But yes, 120°45° (or 135,225,315) and 120°/0°( or 180) should allow you to calibrate a very wide range of probes without ever having to adjust the tilt which kinda sucks to do on the RSH if it's a regular job. Link to comment Share on other sites More sharing options...
[An...] Posted August 27, 2024 Author Share Posted August 27, 2024 Please sign in to view this quote. Thanks, I got all of this working Link to comment Share on other sites More sharing options...
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