[Ro...] Posted March 12, 2020 Share Posted March 12, 2020 Hello All, I have a question regarding true position. What is the difference between these 2 true postions? Any help is much appreciated.InkedIMG_93191_LI.jpg Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/ Share on other sites More sharing options...
[To...] Posted March 12, 2020 Share Posted March 12, 2020 Because SPC can't deal with a variable tolerance that results from using MMC, the (M) is a percentage value of the tolerance used. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89234 Share on other sites More sharing options...
[Ro...] Posted March 12, 2020 Author Share Posted March 12, 2020 Please sign in to view this quote. Hello Tom, Thank you for your reply. If a customer asks me for a value which value should I be reporting to them? Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89236 Share on other sites More sharing options...
[To...] Posted March 12, 2020 Share Posted March 12, 2020 Please sign in to view this quote. The result without the (M). I've seen posts on how to edit this result out of the report but I can't locate them. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89238 Share on other sites More sharing options...
[Ro...] Posted March 12, 2020 Author Share Posted March 12, 2020 Please sign in to view this quote. Thank you for your help and time Tom, I will look for it. Thank you so much Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89240 Share on other sites More sharing options...
[Ri...] Posted March 13, 2020 Share Posted March 13, 2020 viewtopic.php?f=14&t=864 Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89242 Share on other sites More sharing options...
[Ro...] Posted March 13, 2020 Author Share Posted March 13, 2020 Please sign in to view this quote. I have just one more question, the ones without (M) changes it's tolerance by itself. for example- I have a TP of 0.200 and have a MMC on it. Checked it on the CMM and got 0.254 while the tolerance increased too 0.451. If I do report 0.254, it's out of spec (to our customers). Is this something Claypso does by itself and is so, can it be changed (the tolerance) Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89244 Share on other sites More sharing options...
[Am...] Posted March 16, 2020 Share Posted March 16, 2020 QC-Calc Realtime can handle a variable true position with mmc. You have to create a combined plot, the software has instructions and it isn't difficult to do. The only changes you will have to make to your program is you need to report, x,y (if your tp is in xy) location of feature, the size of the mmc feature and the true position. It will take these 4 sets of data to create a combined plot and it will give you a cpk calculation of the TP with mmc. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89246 Share on other sites More sharing options...
[To...] Posted March 30, 2020 Share Posted March 30, 2020 Please sign in to view this quote. That's how MMC works and should not be out of spec for your customers. You gained .251 of bonus tolerance from your feature because of the size of the feature and its' tolerance. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89248 Share on other sites More sharing options...
[Da...] Posted March 31, 2020 Share Posted March 31, 2020 Rohan, check this thread also -> viewtopic.php?p=16343#p16343 Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89250 Share on other sites More sharing options...
[SH...] Posted March 31, 2020 Share Posted March 31, 2020 Please sign in to view this quote. First up all, this is gd&t concept, not CMM, please read the page 32,33,34. I have attached the standard.ASME-Y14.5M-2009.pdf Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89252 Share on other sites More sharing options...
[SH...] Posted March 31, 2020 Share Posted March 31, 2020 Please sign in to view this quote. calypso will automatically report the co-ordinate feature xyz whatever it would be, you have to select additional print out from characteristic feature setting editor, then select true position ON. It would save lot of time. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89254 Share on other sites More sharing options...
[Ke...] Posted March 31, 2020 Share Posted March 31, 2020 Please sign in to view this quote. Thanks for clearing that up for us 😐 Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89256 Share on other sites More sharing options...
[Ri...] Posted March 31, 2020 Share Posted March 31, 2020 This is why percentage of tolerance is better for reporting (also the only way to do CPK/PPK analysis). Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89258 Share on other sites More sharing options...
[Am...] Posted April 2, 2020 Share Posted April 2, 2020 Please sign in to view this quote. This doesn't help if you are trying to create the plot with MMC and calculate a cpk, QC-Calc Real-Time needs to get the data for x,y and size. It doesn't take any time to check 3 boxes instead of two. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89260 Share on other sites More sharing options...
[SH...] Posted April 2, 2020 Share Posted April 2, 2020 Please sign in to view this quote. Is there is any option to calculate cpk value without the use of QC calc Real time. I have piweb,but don't know it will workout. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89262 Share on other sites More sharing options...
[Ri...] Posted April 2, 2020 Share Posted April 2, 2020 Use the Process Protocol, it already has a built-in Histogram, and Process Capability analysis. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89264 Share on other sites More sharing options...
[Am...] Posted April 2, 2020 Share Posted April 2, 2020 I have to have it export all data to QC-Calc, Because all the other equipment feeds data to the QC calc charts as well and its all on one report instead of getting 1 report from the Zeiss, 1 from keyence, 1 from hand tools, and so on. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89266 Share on other sites More sharing options...
[Ri...] Posted April 2, 2020 Share Posted April 2, 2020 Please sign in to view this quote. Just so you are aware, PiWeb SBS/Enterprise can handle all of those tasks, and it much more visually appealing/user appealing. I was a user of QC-CALC for a few years before PiWeb Enterprise launched. All it took was one demo, and we never looked back. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89268 Share on other sites More sharing options...
[Am...] Posted April 2, 2020 Share Posted April 2, 2020 The problem is we have a ton of QC-Calc licenses from years ago and getting this company to change at this point is impossible. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89270 Share on other sites More sharing options...
[Ri...] Posted April 2, 2020 Share Posted April 2, 2020 I understand. It's hard to change, especially if you are heavily invested. Link to comment https://qualityforum.zeiss.com/topic/16114-differences-in-true-postion/#findComment-89272 Share on other sites More sharing options...
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