Tolerance Stack Up Analysis:
How To Handle Clearances
In this guide, we will explore practical examples of handling clearances during tolerance stack-up analysis.
First, we will cover a simple, generalized approach to managing clearances. Then, we will dive into a more specific scenario involving pin-joints.
See episode 2 of the "How to set up a tolerance stack" series
Basic Example Of Clearances and best practise
• Set up your tolerance stack as usual when working with clearances.
• For every clearance, add a guiding line on each side
• This ensures the program calculates your tolerances accurately
• Pushing the boxes to the left and "removing" the clearance has no effect on the calculations. So best practice is to put the object in its neutral position
Handling stack up with pin-joints
• When performing tolerance stack-up analysis with pin-joints, best practise is to place the pin-joint in a neutral position
• This does not affect the calculations, but makes a nicer process.
Advanced tolerance stack example: Part 1
In this example, we need ensure that there is at least 1mm overlap between the yellow arm and the blue arm. To achieve this:
• The image shows two pin joints ,each with its own arm
• First put the object in its neutral position, for a smooth setup
Advanced tolerance stack example: Part 2
• Set up guiding lines
• Place a guide line on each side of every clearance
• Now setup parameter arrows, they should follow the alternating pattern shown in the image
Advanced tolerance stack example: Part 3
• Add parameter values as diameters, not radii. This is corrected when defining the transfer function
Advanced tolerance stack example: Part 4
• When defining the transfer function, manually convert diameter values that should be radii by multiplying them by 0.5
• Add your requirements and run the simulation
Advanced tolerance stack example: Final result
• The final result now shows as passed, which means that our design is robust.
More scenarios
• When defining the transfer function, manually convert diameter values that should be radii by multiplying them by 0.5
• Add your requirements and run the simulation
More scenarios
• When defining the transfer function, manually convert diameter values that should be radii by multiplying them by 0.5
• Add your requirements and run the simulation
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