[Ca...] Posted September 18, 2019 Share Posted September 18, 2019 This is from an older program, it ran normally yesterday. Any ideas???Capture.JPG Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/ Share on other sites More sharing options...
[No...] Posted September 19, 2019 Share Posted September 19, 2019 What kind of feature is it? Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/#findComment-84102 Share on other sites More sharing options...
[Ca...] Posted September 19, 2019 Author Share Posted September 19, 2019 A big and shallow ID Cylinder, scanned at 2 heights. Close to 14" in diameter, and 0.200" deep. Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/#findComment-84104 Share on other sites More sharing options...
[Ma...] Posted June 9, 2020 Share Posted June 9, 2020 I am getting this same message "No Start Value for Iteration" on a similar cylinder. This does not happen on every part. Any ideas what would cause this? Thanks Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/#findComment-84106 Share on other sites More sharing options...
[Ma...] Posted June 9, 2020 Share Posted June 9, 2020 It is part specific also. I can execute just the cylinder on a different part with no problem and then remeasure the cylinder on the first part and get the message again. Filter and outlier elimination turned on or off appear to have no effect on this as well. The only thing I have seen get rid of the message is changing the evaluation range. The problem is I would need to adjust it to the point where there is not much measurement left to accurately evaluate. Then the message will go away. Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/#findComment-84108 Share on other sites More sharing options...
[Cl...] Posted June 9, 2020 Share Posted June 9, 2020 Might this have something to do with the second measurement that happens automatically when your speed is set to slow, or too fast? The word "iteration" prompted me to ask the question. Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/#findComment-84110 Share on other sites More sharing options...
[Mi...] Posted June 9, 2020 Share Posted June 9, 2020 My understanding is that this error has something to do with the algorithm that is used to best-fit cylinders (and maybe other geometry, too). I usually run into it checking large diameter, short length cylinders like you mentioned. I don't know of a fix, but depending on what you need to measure, you might be able to measure several 2d circles at different heights and recall them into a 3d line instead. Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/#findComment-84112 Share on other sites More sharing options...
[Ma...] Posted June 9, 2020 Share Posted June 9, 2020 Please sign in to view this quote. I think that's the route i'm going to take. Thank you Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/#findComment-84114 Share on other sites More sharing options...
[Ma...] Posted June 10, 2020 Share Posted June 10, 2020 I created more space between the 2 cylinder circle paths and the issue went away. Working with a part around Ø200 mm and 9mm thick. One circle path at -2mm from the top and the other at -7mm. I dropped the height of the bottom path by 1mm. In case anyone else was interested. Link to comment https://qualityforum.zeiss.com/topic/15526-no-start-value-for-iteration/#findComment-84116 Share on other sites More sharing options...
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