Tolerance analysis - Part 2

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Hello, my name is Thom Tremblay from Concepts and Design.

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This course is on a modern approach to creating documentation.

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The learning path for this course, we'll look at annotating a 3D model and sharing the annotated model,

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analyzing tolerance relationships in an assembly, and then sharing the results of that analysis.

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This is the fourth course in the series.

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This chapter will be in two parts and will be focusing on setting up a tolerance analysis.

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Now we'll focus on using the Tolerance Analysis tools by selecting Components and selecting the appropriate faces.

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Then we'll revisit, modifying tolerances and reviewing the results.

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Still working in the tolerance analysis assembly, we'll focus in on the bottom portion of the assembly.

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Selecting the new stack up tool again, we’ll pick the seed of the boar in the plate where the bearing is placed,

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and then the mating face of the outer race on the bearing using Select Other.

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We'll then select the YZ plane for the annotation plane and place the initial tolerance.

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This time because there are no relationships between the components, we'll be asked to select components to include in the tolerance stack.

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We'll build from the plate out and then back.

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So first, we'll select the gasket, then the gear cover, the far bearing, the gear,

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and then the bearing that was already included in the initial selection.

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Once that's done, the components will disappear.

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But you'll notice one component, the back plate is visible.

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And if you orbit around, you'll see that the gasket is present but not enabled.

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We'll select the appropriate face on the plate, then it will be disabled.

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Then we'll need to pick the mating face on the gasket.

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Once this is selected, the back plate will disappear and the cover will reappear but not be enabled.

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We'll select the opposite side of the gasket and then the mating face on the cover.

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We'll continue to do this as objects fade in and other objects become prominent.

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You'll notice that it's keeping track of how many out of 10 mating faces have been selected.

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We'll continue to select until we get the last relationship between the gear and the first bearing that was selected.

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And after clicking OK, we'll get the tolerance stack analysis in the panel on the right.

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To make the dimensions a little easier to see or to fit in view, we can go to Settings and change the Annotation Scale.

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Now, we're free to go through the process of modifying the tolerances that were brought in from the components selected.

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One thing that's worth noting is that tolerances that were modified in the first stack up analysis,

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for example, on the bearings, those tolerances carry over as those components have had that tolerance applied to them.

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Going through and changing the results display, we can see that everything that we were able to do,

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leveraging assembly constraints is still possible in the tolerance analysis when using selected components.