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3DCS Tutorial Series - Spec Modes Relative vs Absolute

Aug 29, 2024 3:19:15 PM

Spec Modes Relative vs Absolute

               The purpose of any tolerance analysis model is to add measures to evaluate an area of concern. When adding measures in 3DCS the user has two options when it comes to Spec Modes. In most cases “Relative” spec mode will display the measurement data correctly. In other instances the user will need to utilize the “Absolute” Spec Mode for a measurement to display correctly.   

spec-modes-absolute-vs-relative  

Specification Limits (Spec. Limits)

Upper Spec.: Is the upper specification limit of the measurement visible in the histogram window after running the Simulation.

Lower Spec.: Is the lower specification limit of the measurement visible in the histogram window after running the Simulation.

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The Upper and Lower Spec. Limits can be activated or deactivated in a measure, showing only a N/A (Not Available) in the Simulation Window.

 

Specification ModeThe Spec. Mode can be set as Absolute or Relative to nominal.  For example, if the nominal value is 10, Absolute Spec. Limits would be 8.5 and 11.5 or if they were Relative they would be -1.5 and +1.5.

This video will highlight two different types of measurement scenarios. One of which will demonstrate when the Relative Spec Mode is the ideal choice to use and the other when to use Absolute as the proper Spec Mode. The video also discusses the difference between the Spec Modes and discuss why using one mode or the other is appropriate.

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https://blog.3dcs.com/topic/3dcs-tutorial

 

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