Another MMC Slot Thread

[Lukas]

I tried to use the search function, and I couldn't find this particular method. I think I've used it before, but I just wanted to make sure it's legit before I run my first piece:

1. Create a plane on each side of the slot
2. Create a 3d constructed width feature using the two planes
3. Create a constructed "projection" circle of the width feature
4. Dimension the position of that circle in the one axis and utilize MMC

[Sora5]

If your version of PCDMIS have the construct width feature, why not dimension the width feature? Step 3 and 4 is unnecessary.

[Lukas]

I don't see width features on my list when I go to dimension the position

[louisd]

Interpretation of position control for a slot is highly dependent upon how it is called out on the print. Show us what you are working with and we can help.

[Lukas]

Interpretation of position control for a slot is highly dependent upon how it is called out on the print. Show us what you are working with and we can help.

width mmc.PNG
I'm afraid I can't post the print, but here you go. It's not actually a slot⁠—it's the position of the width of each arm at MMC to A, B, C (A being the ID of the part, B being the front face of the part, and C being the plane on top of the ID). As you can see, I created a width feature and a constructed projection circle, which randomly appeared in the center (not where my width feature is). Hope this helps.

[louisd]

Yeah, without seeing the feature control frame, and how the extension line is attached to the drawing feature, it's still ambiguous.

[louisd]

From your pic, it looks like you are constructing a circle based upon both arms/slots... But you explain the print calls out position of each arm/slot, which is it?

[Lukas]

I only used one width feature to construct the circle, but as I said the constructed "projection" circle appeared at X=0.

[vpt.se]

Create a generic circle, use the XYZ from the width (theos and meas) and use the widths dimension (both theo and the meas) for the diameter of the generic circle.

[vpt.se]

You should...

use the widths dimension (both theo and the meas) for the diameter of the generic circle

.

If you have a TP for the length as well, just copy the generic circle you created for the width - rename it and change the width in the generic circle to the slot length instead. The generic circle now should have the slot length as theo/meas diam.

[Lukas]

Sorry I got confused by "width dimension." I thought you were referring to a distance dimension. So I will use the width feature for both the XYZ and the diameter of the generic circle.

[vpt.se]

Correct. The "width" in the slot feature is the the same as SLOT1.DIAM, the length of the slot is SLOT1.LENGTH (assuming the slot is named SLOT1).