Applying the datum reference frame

00:09

In this exercise, we will be applying the Datum Reference Frame to Tolerance Features.

00:16

So on this part, we've already defined three Tolerance Features. Datum A - our primary datum, datum B - our secondary,

00:24

and datum C - our tertiary.

00:27

In the Tolerance Features folder, you'll see these reference frames listed here.

00:33

In the Tolerance Advisor, you'll see datum reference frame A, B, C that DRF is not referenced.

00:40

So once you've established multiple datums, you can then use that as a reference frame for additional Tolerance Features.

00:48

So if I create a new Tolerance Feature and I choose this whole pattern along the top, and then hit the check mark,

00:55

I can then define a new Tolerance Feature for these 0.27 inch holes.

01:01

There's eight of them, and you can see that it's given a positional tolerance here relative to A, B and C.

01:10

If I double-click on this datum reference frame A, B, C from the feature,

01:16

I can then choose if I only want it to reference A and B.

01:21

So if I don't need C to be established during that inspection, I can specify that.

01:27

You'll notice you can also create a new DRF right here.

01:32

Or if you select "DRF" from the top ribbon, that will also activate the new DRF command.

01:40

So if I click "New DRF,"

01:44

I can then establish a new reference frame where maybe I decide that my secondary datum is going to be datum C.

01:51

To do that, my "Primary" will still be A, my "Secondary" will be C, my "Tertiary" will be B.

01:60

You can also specify if any of these are going to have a max material boundary.

02:06

Then you can select "OK" to confirm the new reference frame A, C, B.

02:13

I'll then hit the "Check" mark to confirm that feature control frame.

02:17

So you'll notice now in my Tolerance Features folder, I have my A, B, C reference frame and the A, C, B reference frame that I just created.