Great videos Dean sir, Can you do some videos on inspectors completing FAI’s (first article inspection)? I realize that gets into softwares like Net Inspect and it gets away from the actual physical inspection of the part but there are FAI reviewers out there that do just that - they just review the CMM part info, review input data in Net Inspect, and double check other paperwork. That would be great! Thank you so much for helping me understand GD&T.
Hi, thanks for the input! It’s on my list of videos to make. The short answer about composite position inspection is that the inspection part is generally the same, it is the interpretation of the data that is different.
I know you are also a user and teacher of Zeiss Calypso CMM Inspection software. Have you created a video on how to set up a two single segment positional tolerance inspection using Calypso? I have located a couple of references for this on the internet but we are still having issues at our manufacturing facility in how to establish this measurement.
Thank you fo the clever explanation, it's very clear. I have one question though, what happens if for a 4 X hole pattern we put just one line position tolerance diameter, .030 MMC to A, B & C. Like the first one you had before you explained the composite tolerance. I believe with that one we are not controling the relative position between holes, so how this could be inspected? Thank you again.
Great videos Dean, I am a new subscriber. at 2:38 you say rotational to B. Does that mean up down distance from the holes to B and that delta of each left to right to the .01 tolerance but float in the .03? You said no measurements needed but I feel like you need measurements but you compare the delta of the measurements? Also, is it the bottom left vs the bottom right or top left and top right??? Or all to each other?
I would have to disagree on the perpendicularity to A. The pattern tolerance, sure. But I don't believe it would be perpendicularity UNLESS it is a stand alone call-out. But since it is attached to a datum structured tolerance, the pattern is all that is necessary for the A tolerance
thank you “Composit Position” appears to be meaningless when the part is completely fixed in the assembled state and cannot move or rotate at all. So, is “composit position” used when parts can move or rotate slightly in the assembled state? I am curious in what cases “composit position” is applied to part drawings.
I just came across your videos search for a issue I'm having. I have a Two Single Segment Position tolerance on a hole top is 0.3 to one datum and bottom is 0.25 to the same one datum. I'm tasked with finding the min wall thickness of the hole to the outside edge of the part. I'm a drafter and rarely have to do stack ups but I know how to do them with a single position tolerance but not sure how to do it with two. Any suggestions would help.
Hi, because they are referenced to the same datum and are single segment, I would use the larger of the two for wall thickness calculations. Is the feature a hole positioned coaxially to a cylinder?
@@RDeanOdell The outside of the part tapers inward so as the farther down the hole is the less and less the wall thickness is. I needed to know the min wall thickness to make sure when the hole is drilled through the parts it always stays within the min wall thickness.
Hi, there is no support for composite position in ISO. With an ISO drawing, using one position symbol with two tolerances or two position symbols mean the same thing.
@@RDeanOdell Yes I got that perhaps I was not clearly in my question. When you look at ISO 5459-2013-05 page 76 composite curve is there but not explained in anywhere in the standard. Perhaps I overlooked it.
There is school math - .01 is 1 hundredth There is shop math - .01 is 10 "thou" The reason is most everything in the shop is based on thousandths of an inch... or 3 decimal places. So always assume it's 3 decimal places & call it "thou", even if it's not written that way. .1 = .100 = 100 thou (sandths) .03 = .030 = 30 thou (sandths) if you go to 4 decimals... that is tenths (for ten thousandths of an inch). .0011 is either 11 tenths or 1 thou 1 tenth .0204 is best said 20 thou 4 tenths (or 20 thou and 4 tenths). if you go beyond that it's in millionths (6 decimal places). .002002 = 2 thou 2 millionths .00202 = .002020 = 2 thou 20 millionths notice also there is no zero in front of the decimal... 0.03. The zero would mean the measurements are metric. Imperial does not put the zero in front of the decimal.
![[MV] A leap of faith...ความเชื่อใจครั้งสุดท้าย (From "Petrichor the series")](http://i.ytimg.com/vi/U1piZH2CNXA/mqdefault.jpg)
Great videos Dean sir,
Can you do some videos on inspectors completing FAI’s (first article inspection)? I realize that gets into softwares like Net Inspect and it gets away from the actual physical inspection of the part but there are FAI reviewers out there that do just that - they just review the CMM part info, review input data in Net Inspect, and double check other paperwork. That would be great! Thank you so much for helping me understand GD&T.
Thanks Dean for your excellent videos.
Would you like to make some videos ON INSPECTIONS of Composite tolerance with 1, 2 datum references? Thanks
Hi, thanks for the input! It’s on my list of videos to make. The short answer about composite position inspection is that the inspection part is generally the same, it is the interpretation of the data that is different.
@@RDeanOdell Thanks Dean. I'd like to learn it on Calypso :)
I know you are also a user and teacher of Zeiss Calypso CMM Inspection software. Have you created a video on how to set up a two single segment positional tolerance inspection using Calypso? I have located a couple of references for this on the internet but we are still having issues at our manufacturing facility in how to establish this measurement.
Thanks Dean for your excellent videos.
You’re welcome! Thanks!
Thank you fo the clever explanation, it's very clear. I have one question though, what happens if for a 4 X hole pattern we put just one line position tolerance diameter, .030 MMC to A, B & C. Like the first one you had before you explained the composite tolerance. I believe with that one we are not controling the relative position between holes, so how this could be inspected? Thank you again.
Great videos Dean, I am a new subscriber. at 2:38 you say rotational to B. Does that mean up down distance from the holes to B and that delta of each left to right to the .01 tolerance but float in the .03? You said no measurements needed but I feel like you need measurements but you compare the delta of the measurements? Also, is it the bottom left vs the bottom right or top left and top right??? Or all to each other?
I have learnt a lot. Thank you.
Glad to hear that!
I would have to disagree on the perpendicularity to A. The pattern tolerance, sure. But I don't believe it would be perpendicularity UNLESS it is a stand alone call-out. But since it is attached to a datum structured tolerance, the pattern is all that is necessary for the A tolerance
Hello Dean...Now understood clearly. Thanks for the Video.
Great to hear! Thank you for the feedback.
Can you pls give me the link for light switch ex as you said in the video...
@@raghavendrapalekar6739 Here it is: GD&T ASME Y14.5 Composite Position Tolerance Practical Explanation
th-cam.com/video/NOX9t2XxgI4/w-d-xo.html
thank you
“Composit Position” appears to be meaningless when the part is completely fixed in the assembled state and cannot move or rotate at all.
So, is “composit position” used when parts can move or rotate slightly in the assembled state?
I am curious in what cases “composit position” is applied to part drawings.
I just came across your videos search for a issue I'm having. I have a Two Single Segment Position tolerance on a hole top is 0.3 to one datum and bottom is 0.25 to the same one datum. I'm tasked with finding the min wall thickness of the hole to the outside edge of the part. I'm a drafter and rarely have to do stack ups but I know how to do them with a single position tolerance but not sure how to do it with two. Any suggestions would help.
Hi, because they are referenced to the same datum and are single segment, I would use the larger of the two for wall thickness calculations. Is the feature a hole positioned coaxially to a cylinder?
@@RDeanOdell The outside of the part tapers inward so as the farther down the hole is the less and less the wall thickness is. I needed to know the min wall thickness to make sure when the hole is drilled through the parts it always stays within the min wall thickness.
Thanks Dean
You’re welcome! Thanks for watching.
In ISO Standard Composite Tolerance is not explained as far as I know. I think it is something only used by ANSI.
Hi, there is no support for composite position in ISO. With an ISO drawing, using one position symbol with two tolerances or two position symbols mean the same thing.
@@RDeanOdell Yes I got that perhaps I was not clearly in my question. When you look at ISO 5459-2013-05 page 76 composite curve is there but not explained in anywhere in the standard. Perhaps I overlooked it.
In ISO you need to use CZ,SZ or CZR modifier to have composite controls
Thanks for the explanation
You are welcome! Thanks for watching.
True position without any datum, what that mean?
Are those ten-thousandths or one hundredth? Likewise, thirty-thousandths or three-hundredths? I thought 1/100 and 3/100 respectively.
There is school math - .01 is 1 hundredth
There is shop math - .01 is 10 "thou"
The reason is most everything in the shop is based on thousandths of an inch... or 3 decimal places. So always assume it's 3 decimal places & call it "thou", even if it's not written that way.
.1 = .100 = 100 thou (sandths)
.03 = .030 = 30 thou (sandths)
if you go to 4 decimals... that is tenths (for ten thousandths of an inch).
.0011 is either 11 tenths or 1 thou 1 tenth
.0204 is best said 20 thou 4 tenths (or 20 thou and 4 tenths).
if you go beyond that it's in millionths (6 decimal places).
.002002 = 2 thou 2 millionths
.00202 = .002020 = 2 thou 20 millionths
notice also there is no zero in front of the decimal... 0.03. The zero would mean the measurements are metric. Imperial does not put the zero in front of the decimal.
So easy a caveman can do it.