Creo Parametric 9.0 introduces an innovative Center option for assembly shift bias. This feature aids in accurately reflecting the real-world scenario of manufactured parts within the tolerance stack-up definition. Additionally, a new simple fit check has been incorporated to identify clearance issues between two size features. Furthermore, users can now utilize cross-section planes as the annotation plane when defining a new stack-up.

The EZ Tolerance Analysis in Creo Parametric 9.0 boasts several enhancements geared towards boosting productivity in the definition of tolerance stack-ups.

Consider a brake caliper assembly that already has a defined stack-up for the rotor and the brake caliper gap.

Within this stack-up, a bolt is intended to go through a threaded insert inside the orange part. Although this thread has not been modeled yet, it is known that there should be no clearance between the shaft and the hole of these two components in the stack-up definition. The stack-up should accurately represent the final state of the assembly.

When EZ Tolerance Analysis identifies a clearance between a shaft and a hole, it offers options for handling positional variation between the two features. By default, the shaft is allowed to float within the hole, treated as additional tolerance in the stack-up results. However, with the new Creo 9.0 enhancement, users can set the Assembly Shift to be Center, thereby eliminating its impact on the tolerance stack-up.

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