1. What is True Position Tolerance?

True Position Tolerance is a geometric dimensioning and tolerancing (GD&T) concept that defines the permissible deviation of a feature from its exact theoretical position. It is calculated using the formula: 2 × √(Δx² + Δy²).

2. How Does the Calculator Work?

The calculator uses the True Position formula:

Where:

• \( \Delta x \) — Deviation in the x-axis direction
• \( \Delta y \) — Deviation in the y-axis direction

Explanation: The formula calculates the diameter of the tolerance zone within which the center of a feature must lie relative to its true position.

3. Importance of True Position Calculation

Details: Accurate True Position calculation is crucial for ensuring proper fit and function of mechanical components, maintaining quality control in manufacturing, and meeting design specifications in engineering applications.

4. Using the Calculator

Tips: Enter the deviations in x and y directions in the same units. The calculator will compute the true position tolerance based on the input values.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for the deviations?
A: You can use any consistent unit system (mm, inches, etc.) as long as both Δx and Δy are in the same units.

Q2: How is True Position different from linear tolerance?
A: True Position defines a circular tolerance zone around the theoretical point, while linear tolerance defines separate rectangular zones for each axis.

Q3: When is True Position tolerance used?
A: It's commonly used in precision manufacturing, automotive, aerospace, and any application where the position of features relative to each other is critical.

Q4: Can True Position be applied to 3D coordinates?
A: While this calculator handles 2D positions, True Position can be extended to 3D using the formula: 2 × √(Δx² + Δy² + Δz²).

Q5: What does the result represent?
A: The result represents the diameter of the tolerance zone within which the actual position of the feature must lie to be within specification.