Diameter angle intersect

[QS920]

Good morning all,

I'm having some sort of brain malfunction on how to measure this diameter to the intersection length.
I did a search on this and didn't find what I was looking for, any help with this is very much appreciated.
See attached
Thanks in advance!

[dph51]

Maybe ...........
Measure cone
construct diameter at height

Can’t read your picture

[QS920]

I'll try that thank you.

[QS920]

Capture2.JPG
Here's another print

[Schlag]

Those are all BASIC. Is there an all around PROFILE callout ? If that's the case the intersections don't really mean anything and they ware looking at 100% of the form. Yeah depending on the manufacturing process those numbers might be need for part adjustment information but as far as FAI reporting they mean nothing.

[QS920]

There is a .030 profile callout.

[QS920]

Here is the profile callout Capture3.JPG

[KIRBSTER269]

Well according to what you have shown "Y" is a Legit Datum, because it is an actual feature (surface). But "X" can't be an imaginary center line. Is it the center of an inside Cylinder? Outside Cylinder? Is it a String? Sorry if your going to call it back to Datums, they have to actually exist. But as far as the question Schlag is on it. Profile is the purpose of those Basics, it will control Form and Location if you can figure out what "X" actual is

[QS920]

Agreed, we've had this conversation with the customer, we were instructed to create cylinder of the the 7.20 diameter set that as datum x.
So would a cone be the best way to measure these diameter callouts as dph51 suggested?

[KIRBSTER269]

you can do that or do some scans, maybe a bunch of close scans, tie them all together or separate your choice and report profile and then choose Analysis under Insert/Report Command/ Analysis so you can see the shape or shapes in the tolerance zone

[KIRBSTER269]

Just an example


Screenshot (1).jpg

just another example bilateral scans to the left unilateral to the right, blue lines represent tolerance zone, why you only see one to the right

Capture.JPG

image_18247[1].jpg

[KIRBSTER269]

I would do open scan or scans also in the "X" direction across all the cones.

[QS920]

Excellent example!!

[QS920]

Good suggestion, thank you, however I don't have scanning, we have tp20 and pcdmis cad, not pcdmis cad++.

[KIRBSTER269]

you can still do those scans

[QS920]

with points across the surface, then create feature set and dimension that??

[KIRBSTER269]

yep !

[KIRBSTER269]

Can't remember with no ++ if these scans are grayed out then create a bunch of points and then create a Feature Set. This will be your scan.

Capture.JPGimage_18247[1].jpg

[QS920]

Yes they are all grayed out, I will try the feature set way when I get a part. thank you

[KIRBSTER269]

make sure your cursor is in the DCC part of your program before you rule it out

[QS920]

I checked still grayed out, thanks for the thought.

[QS920]

I will post what happens when I get a part, THANK YOU everybody!

[A-machine-insp]

What I do with parts like that is make 2D features to measure it. This is assuming you need to capture the basic dimensions as I have to do.

In your case I would set the part up sitting on the (what I would call) the bottom (ref 2.15 dimension, 7.20 diameter pointing Z+). Align the part with Datum X as X & Y zero and parallel to Z axis, and Datum Y as Z zero . Now you can take points and create exactly what you are seeing in the drawing on both sides of the part.. Create your lines, radii, and intersection points to get the basic dimensions. With Datum X as X & Y zero, you can easily take points in a straight line by setting the points at X or Y zero. Example: Say the print is looking Y+, those points would be at Y0 with a perfect 0,1,0 or 0,-1,0 vector. Now, me being me, I would do it in more than one spot so I would create it on one side of the part then do a pattern offset rotating the pattern about Z however many times you want. After that, you just have to make the probe clear for tip rotations and add the correct tip angles. You can effectively check

At my job, we have to capture basic dimensions as well as the profile/true position/ect. If you have to do the same, say you pattern offset and create the above in 4 places (both sides of the cross section 45° apart) around the part, you can also create a scan set from those points and profile the scan killing 2 birds with 1 CMM.

[QS920]

Good info thank you!

[A-machine-insp]

QS920 In cases like this (and many others), paste with pattern is your friend... or mistress. I go out of my way to find ways to use it because it can save so much time during programming.

[QS920]

All,
On friday the customer's engineer has decided that the "the numbers don't add up with this print" so now the project is on hold. Go figure!!
I did decide to measure the diameter's with cones and constructed diameter at the print length as suggested above, also I took a whole lot of points along the profile created a set and dimensioned that with the profile callout also as suggested above.

So thanks again, to be continued...

[Cumofo]

I would shoot for something like "GAUGE DIAMETER"?