Profile troubles

[jay R]

Hey everybody, it is a great day for me today and maybe not so much for you all!! I finally have internet access in my inspection lab, so posting questions will be a little easier for me.

As always thanks in advance for the help.

I finally got 3.25 mr3 up and running and am now having troubles with the profile dimensioning. When I try to do a profile dimension relative to a datum, it always outputs 2 profile dimensions, one for the feature and one for the datum, with no relationship between the two. Here is what it looks like when I try to relate the feature to the datum, the first picture, pro 1.

One thing I am not sure of, should I have a "use datums" field within the profile dimension window? I don't as shown in the second screen cap.

Let me know what else you require to help sort this out with me.

Thank you,

Jay

[jkb_mcg]

I'm not even sure if checking profile is the right thing to do?? I usually check profile to a scan (Linear Open). It sounds to me like all your trying to check is flatness. I think the reason your report looks like it does is because you have form and location checked. A profile tolerance is either unilateral (Form) or bilateral (Form and Location) . Your print should tell you which it is. The only time I use profile is when I'm trying to compare my part to the CAD Model. If you don't have a CAD Model, I would just check it as flatness.

HTH!

Josh

[Duckhunter]

profile of multile features

You will not have an otion for "use datums", the current alignment is the default profile reference. By selecting more than 1 feature in the profile field, all you are doing is telling PC-DMIS to profile more than one feature to the current datum structure.

[jay R]

OK, not sure I am understanding this. The print has a profile callout for this surface relative to the A, B, and C datums. In the past with my old version, 3.2 when I had this, I selected the plane(in this case the profile dimensioned feature) and then the a,b, and c, datums . In my case they are almost always bilateral, so I select form and location, provide a plus/minus tolerance and an extended length. The dimension output always showed me relative to the datums.

Now, I can't select datums as before, and if I am understanding you correctly, PCDMis is using my alignment to referance the profile back to a,b, and c datums. If this is the case, why am i always showing a zero measured value?

Let me know what else I need to clear this up for, as I am sure I am missing something here.

Thank you

JAY

[Paul Sarrach]

My opion is don't use profile, instead use Surface Points and then Tolerace the T Value for your call out. Not only is that what the T Value Funtion if for, it will also identify exactly where if any the Profile is out of Tolerance.

[Ravenmaniac]

What is with the profile issues as of late? Is it like suddenly profile became the most misunderstood thing in the dimensional universe this week? I better recheck the alignment of the planets ......B

[Mark Farren]

Well they did take 1 away!!!!!

[kbotta]

No doubt. now i can't een stand up straight...

[Paul Sarrach]

What is with the profile issues as of late? Is it like suddenly profile became the most misunderstood thing in the dimensional universe this week? I better recheck the alignment of the planets ......B

Does seem that way. But Jay just got online with us, Newbie Welcome. Dude use the Seach option also, there are a lot of answers there that will be quicker than a response. As for the planets I miss Pluto already http://www.physics.uc.edu/~hanson/AS.../pluto_dog.jpg

[Wes Cisco]

What is with the profile issues as of late? Is it like suddenly profile became the most misunderstood thing in the dimensional universe this week? I better recheck the alignment of the planets ......B

We are just giving trueposition with modifers on the datums a small break while the 4heads develop a strong false sense of security. Wait until next month!
BHWAHAHHAHAHHAHAHHAHHAHAHHAHAHAHHAHA!!!!!!!!!!!!!!

[dccfreak]

The need to choose the datums were removed in 3.25 and so on when doing profiles. You just need to choose your feature, PC-DMIS will now treat it relative to the current alignment so if you are leveled and squared to your datums, you should be okay.

The easiest way is to still use points and x,y,z and t deviations when doing those sorts of things.

[Ravenmaniac]

Sorry about the sarcasm Jay...welcome aboard. It's been a l-o-n-g week so far. And yeah...I do feel lightheaded now that Pluto is only a Disney dog again.....B

[Wes Cisco]

Sorry about the sarcasm Jay...welcome aboard. It's been a l-o-n-g week so far. And yeah...I do feel lightheaded now that Pluto is only a Disney dog again.....B

WRS (What Ravenmaniac said)

Welcome to the forum. I think DCCFreak has the answer you need, but you should note that not only is there the search tool, but once you start a new thread, scroll to the bottom of the screen, and you will see that the forum automatically provides a list of similar threads. There has been a masssive outbreak of profile queasiness of late. Could have been something we ate. . .

[jay R]

Thanks guys, not totally new, was at the other forum before the move here. Please bear in mind that I am entirely self taught regarding GD&T and the use of PCDMis and our CMM, (or cnn as one of my superior intellect colleagues calls it!!).

I believe my first question was how to do an alignment, well past that now.

It took me a while to get profile worked out with 3.2, but finally did, then after much trouble, I finally got my 3.25 operational and felt retarded again.

I have read every single thread on the forum in an effort to increase my proficiency with this machine and system.

The problem I had here was that the profile was called out respective to datum targets/casting points. Once I was able to align to those, my profile worked perfectly. Like I said, the biggest confusion I was facing was the difference between 3.2 and 3.25.

Thanks again for the help guys, sarcasm aside, you did help me find the answer I was looking for.