Creo Parametric - Geometric Tolerances (GD&T) - Model Based Definition (MBD)

I took this excellent training class in geometric dimensioning and tolerancing from Scott Newman of technical consultants incorporated and you can find more information about them at wgal.com and I wanted to take one of their parts and go through the different dimensioning and tolerancing of it so I've got the part open I'm on my m BD 5 set datums combination state and I'm gonna start off with my geometric tolerance for the flatness of the a datum so let's go to the annotate tab and here we have geometric tolerance and actually before I do that let me make sure that I am using the right annotation plane unless yeah I think I actually do want to use yeah let's start with actually let's start with the left one because eventually I'm gonna use this essay and this as being missus C so it might be helpful to look at it in this orientation so with left active let's now go to geometric tolerance and my first one is going to be for the flatness of this surface and we move out about over here and then middle mouse click and right now it's using my surface profile if you go to the geometric characteristic drop-down list you can change the type that you're using and this one should not have any datum references so let's remove them that's why you can see that red horizontal bar underneath they're telling that there's something wrong and get rid of the last one and that's good now we have our flatness depicted and with that created now I can make a datum feature symbol indicating that that is a Celeste click on datum future symbol and I will select the geometric tolerance as the reference I'm gonna drag it down than the middle mouse button and there we have our a reference for the B reference it's going to be the bottom surface here and I'm gonna qualify that with a perpendicularity tolerance let's again go to 2 your tolerance and I'm going to select the surface and then drag out over here let's change the geometric characteristic from flatness to perpendicularity and again we've got a little red horizontal bar indicating that there is an error and it needs a datum to reference to pick the a datum I can either enter it manually but I actually prefer to select the data reference from the model which is what this icon does and then I can pick the a reference then let's click OK out of the select dialog box and it is using a lets click on the background of the screens get out of there now I can create my be datum click on datum feature symbol select the geometric tolerance as the reference middle mouse click and there I have the be reference and for the seat reference it's going to be perpendicular with respect to both a and B and for this one in a change I was gonna the c reference is going to be this surface but i don't want it to be parallel to my to existing datums let's use the back annotation plane so that's good now we'll go to geometric tolerance and I'll pick this surface and then middle mouse click and it's perpendicular with the value that I want with respect to a let's add in our second reference and we can click the icon and then select the be datum then click OK and click on the background to get out now we will create our c datum datum feature symbol select this drag down and then middle mouse click and now I have all my ABC datums created so now I want to start creating my different annotations and for that I'm going to use the MB d7 a combination state you'll notice that since I switched States those three that were on MB d5 went away and when I jumped back to 5 realize I forgot to save my new orientation and let's say I want to look at it like such maybe I want to grab this and drag it so that it's not overlapping on model geometry and then I can click update so it remembers that this is the orientation actually that's make it a little bigger now I'll click update again all right back over to MB d7a and first I'm going to start off by displaying a bunch of the different dimensions I'll click show annotations and let's pick the major extrude and I see all the different dimensions visible on here and I actually want all of them so I'm going to select all and then click OK and now we'll start cleaning them up and right now all of them are selected and I want them out to three decimal places I have a mix of values here actually yeah I'll ask to change all to 3 decimal places I don't want them rounded and for most of these dimensions they are going to be basic dimensions now I have a note that says that all dimensions should be basic but I can go let's see let's deselect them on here my 45 dimension is sitting in the middle of the part let's also select all these different annotations and move them to the front plane I'll use my selection filter to go to annotation and then swipe a box over all of them let's close this message and I can right mouse click and choose move to plane bring it up to the front surface that makes it a little easier alright for cleaning up let's select this 45 dimension I can drag it out over here so again it's not on geometry and for this 45 dimension maybe I want it to be zero decimal places for some of the other different dimensions like the 750 over here I can go to the tolerance and make that one basic puts the box around it and let me see here for these other different dimensions let's also make them basic dimensions so that's good for a few then let's see what other dimensions am I missing let's go to show annotations again and let's select this hole and there we have one of our important dimensions for the diameter of the hole that's good let's click OK and I'm gonna grab it and drag it out here off of the part and from the mini toolbar I can choose to flip the arrows and for this one this is going to have a position geometric tolerance so let's create that let's go to geometric tolerance and actually let's change let's get out of there and make sure that we are using the correct annotation plane and now I will go to geometric tolerance again and let's select the dimension and the geometric characteristic for this one it's not going to be perpendicular it is going to be position and the value is going to be 0.01 oh and it updates automatically on the screen and it's gonna be with respect to the a B and C datums I'll click on this and grab the C D term I'm gonna jump over to m BD v and select my C datum then click OK and jump back over to MB d7 and there we can see the C datum in there and one other thing about this this position tolerance is going to be with the Max material boundary so let's click up in the collector where we have the value and then from these symbols I can scroll down in here to find Max material boundary and it adds it in there and it's located within that annotation all right good for that one now and one adjusting it in here let's update the orientation on the screen let's take a look at some of the other different dimensions that should be in here actually as I see it I see the 2.5 dimension in here grab this drag it off I didn't like how it was sticking out in space there let's go to show annotations and sometimes I just walk down the tree and see a what other different dimensions do I want on here and yes I want this dimension actually wants in this case all of them let's just select all and then click OK and like before I want all these out to three decimal places and I don't want them rounded and now I can grab individual dimensions let's drag it off the geometry Neil knows that it's automatically snapping to the midpoint as I'm dragging it and for the 344 dimension come on there we go I've got it drag it off the part and from the mini toolbar by right-clicking I can flip the arrows to the outside as well and this particular dimension it's going to have plus/minus tolerance and the plus is going to be plus 0.05 and the minus is going to be minus zero two for the geometric tolerance for this one and it's also going to be a position tolerance let's select it and let's see what else do I want in here this one we're going to have a value of point Oh 12 and Max material condition with respect to a B and C and let's see I think oh let's see a few other different things oh yeah this is going to be a basic dimension let's select it and go to basic same with this one select it go to tolerance and then basic and doing a quick check to see to do to do let's see grabbing that maybe reposition this one a little bit over here so can it's off of the park geometry and there are a couple other different ones that I want to do and we're gonna have a surface profile but it's only going to be in effect from essentially this edge around these outer surfaces down to this bottom edge so I'm going to create some notes to indicate my different position references let's start off by creating a note and for this note it's going to be on this edge over here and then middle mouse click and we're going to indicate this with letter X and let's do the same thing down at the bottom create a note and then add over here middle mouse click and let's use the letter Y oops hit the enter key click on the background of the screen a couple times to deselect everything and for my final surface profile tolerance let's go to the geometric tolerance and I'm gonna select this surface and then middle mouse click to locate it let's change the geometric character characteristic to profile of a surface and it's not gonna be max material condition Stevan warning me that I'm using a symbol that's not allowed so I can just delete it and change the value and it is gonna be with respect to a B and C but it's just going to be from X all the way to Y and here's where I'm going to do a little trick I'm gonna go to the additional text and I want X and then the double arrow to Y located down here and if I go to the symbols drop down I can see that it's listed right here and it puts it up right next to the value and it says hey there are invalid characters following the tolerance highs value no kidding so I'm highlighting it I'll use control X and let's go back to additional text I'll type in X space and then ctrl V to paste that symbol back in there and then Y and let's Center it in there and we have our final geometric tolerance created that's great let's hit the Update button and in this way oh wait one more thing I forgot let's make this also a basic dimension there you go now I am complete in terms of creating my annotations for the dimensions and tolerances of the whole bar I hope you enjoyed this video for more information please visit WWE windchill comm if you learned something from this video please give it a thumbs up and if you liked this video please click the subscribe button to be informed when new videos are uploaded thank you very much

Channel: Creo Parametric

Views: 19,808

Keywords: creo parametric, ptc creo, creo ptc, creo parametric tutorial, creo parametric 2.0, creo parametric 2.0 tutorial, creo parametric 3.0, creo parametric 3.0 tutorial, creo parametric 4.0, creo parametric 4.0 tutorial, creo parametric 5.0, creo parametric 5.0 tutorial, creo parametric 6.0, creo parametric 6.0 tutorial

Id: 6FjFrxUwBXY

Length: 13min 51sec (831 seconds)

Published: Wed Jun 05 2019