[Ia...] Posted April 30, 2020 Share Posted April 30, 2020 Has anyone ever come across this. One one flank of the gear tooth the probe follows the profile correctly. One the other side it follows the profile correctly, but reports a deviation of my probe width. Roughly 2mm(0.078"). This has only started doing this recently. It's as if the software cannot determine which side of the probe to report with. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/ Share on other sites More sharing options...
[Da...] Posted April 30, 2020 Share Posted April 30, 2020 What is the size of the Probe? Looks like probe calculation problem. Probe center vs Stylus Radius Correction Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72898 Share on other sites More sharing options...
[Ia...] Posted April 30, 2020 Author Share Posted April 30, 2020 2mm(0.078") Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72900 Share on other sites More sharing options...
[Da...] Posted April 30, 2020 Share Posted April 30, 2020 Is there a Setting for Stylus Radius Correction? Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72902 Share on other sites More sharing options...
[Ia...] Posted April 30, 2020 Author Share Posted April 30, 2020 Not sure. This has not been an issue until recently. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72904 Share on other sites More sharing options...
[Cl...] Posted April 30, 2020 Share Posted April 30, 2020 How did you create the curve? Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72906 Share on other sites More sharing options...
[Kl...] Posted April 30, 2020 Share Posted April 30, 2020 - Could be a wrong or missing planar Rotation ? - Try BestFit around space axis and check the Rotation angle Deviation - the plot do not Show the normal direction ? - search distance for actual used for Deviation ? Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72908 Share on other sites More sharing options...
[Ia...] Posted April 30, 2020 Author Share Posted April 30, 2020 I re ran the curve using a smaller probe 1mm(0.039") and it turned out ok. Not sure why it didn't like the 2mm. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72910 Share on other sites More sharing options...
[Cl...] Posted April 30, 2020 Share Posted April 30, 2020 Maybe the part size and point spacing in the curve conflict with the larger probe? Like maybe a ratio thing going on? Just thinking out loud. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72912 Share on other sites More sharing options...
[Ia...] Posted April 30, 2020 Author Share Posted April 30, 2020 Max search distance is at default 0.1969. Best Fit Rotation is fixed around Z axis. Translation Fixed along X and Y. I created the curve by using CAD, Creating Features, Section (then I select the feature that I want), Hierarchy (which is where I select the profile that I want, and eliminate the points that I don't want), Creation ( I key in the number of points that I want, then click Curve). Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72914 Share on other sites More sharing options...
[Ia...] Posted April 30, 2020 Author Share Posted April 30, 2020 I can try reducing the point density with the 2mm probe and see how that goes. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72916 Share on other sites More sharing options...
[Cl...] Posted April 30, 2020 Share Posted April 30, 2020 So you section the part, go to wire frame, pick on the curves all the way around and select (2d) curve from creation? Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72918 Share on other sites More sharing options...
[Ri...] Posted April 30, 2020 Share Posted April 30, 2020 Please sign in to view this quote. Turn off the Rotation in the Z axis and see what it looks like. I've never seen this error before, but what might be happening is the error isn't being split correctly for the Best Fit. You might even try aligning to one tooth/gap, and measuring to that alignment instead of using the need of the Best Fit (at least in the Rotation side). Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72920 Share on other sites More sharing options...
[Ia...] Posted April 30, 2020 Author Share Posted April 30, 2020 I Section the part, then go to Hierarchy. Toggle the top box off which has the file name in it. Then pick the curves that I want measured. Then go to Creation Type the number of points I want in the points box, then select Curve. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72922 Share on other sites More sharing options...
[Ia...] Posted September 17, 2020 Author Share Posted September 17, 2020 It looks like the radius at the root is too tight, and the Calypso software isn't sophisticated enough to be able to calculate the transition. Even with best fit off, it improves, but there are still several random teeth where this error is present. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72924 Share on other sites More sharing options...
[Ia...] Posted November 19, 2020 Author Share Posted November 19, 2020 I'm still struggling with this. Calypso randomly switches the measurement output one full diameter of the probe while performing a curve trace. I am currently using a 0.8mm probe, and this trace was run at 0.005 speed. Does any one have any insight into this? Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72926 Share on other sites More sharing options...
[Ch...] Posted November 19, 2020 Share Posted November 19, 2020 Is this a 2D curve? If so, then it may be that you need to "Digitize" the curve. Apologies if I'm off-base. I'm short on time and could only skim this thread; However, most of the time that i've had probe radius corrections errors on 2D curves it was a result of not Digitizing the curve. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72928 Share on other sites More sharing options...
[Ia...] Posted November 19, 2020 Author Share Posted November 19, 2020 Yes, it is a 2D Curve. How do you Digitize a curve? Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72930 Share on other sites More sharing options...
[Ch...] Posted November 19, 2020 Share Posted November 19, 2020 open up the curve feature and in the middle drop down menu there is a digitizing option somewhere in there. If you have it off, I think they make it bright red or something. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72932 Share on other sites More sharing options...
[Ia...] Posted November 19, 2020 Author Share Posted November 19, 2020 Ok, I found it. Sadly, Digitizing was turned on, so not the fix I was hoping for. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72934 Share on other sites More sharing options...
[Ow...] Posted November 19, 2020 Share Posted November 19, 2020 He created the curve off the cad model so, I can't see digitalizing it doing any good. Digitalizing is creating new nominals by scanning around the gear teeth to acquire them (new nominals) and unless you have a master part, I wouldn't recommend it. When you open up the curve feature, does it show all the nominal vectors perpendicular to the surface, i.e pointing away from the curve line? If some of the nominal vectors, any for that mater, point the opposite way, then that may be the problem. If so, I'd recommend recreating the curve from the model or you could go in an reverse each vector but, recreating it would be probably be quicker. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72936 Share on other sites More sharing options...
[Ia...] Posted November 19, 2020 Author Share Posted November 19, 2020 All of the vectors look fine. It usually crashes on me if they weren't. I should note, that this isn't a gear in this case. It's a series of grooves in a plate. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72938 Share on other sites More sharing options...
[Ia...] Posted November 19, 2020 Author Share Posted November 19, 2020 This is how it looks in the Curve creation screen. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72940 Share on other sites More sharing options...
[Ia...] Posted November 19, 2020 Author Share Posted November 19, 2020 I measured this same part in September 2019, and it didn't look like this. This seems to have started after an upgrade has happened. Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72942 Share on other sites More sharing options...
[Ri...] Posted November 19, 2020 Share Posted November 19, 2020 Yeah. I think you have a bug. What SP are you on? Link to comment https://qualityforum.zeiss.com/topic/14050-probe-deviation-in-curve/#findComment-72944 Share on other sites More sharing options...
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