Test Semi-Dynamic Repeatability

This section introduces how to test semi-dynamic repeatability.

Semi-dynamic repeatability testing

In semi-dynamic repeatability testing, the part is fixed in place using a fixture, and the robot, equipped with a camera, moves sequentially to the measurement positions of each feature on the part and takes photos. After completing one round of photo captures, the same operation is repeated to complete the remaining rounds. For example, if a part has 5 features, the semi-dynamic repeatability testing is performed as follows:

Secure the part: Secure the part using a fixture.
First round of photo capture: The robot, equipped with the camera, takes photos of all the features on the part in sequence (Feature 1 → Feature 2 → Feature 3 → Feature 4 → Feature 5).
Repeat the process: The robot repeats step 2 for the remaining 19 rounds of photo captures. The semi-dynamic repeatability test for the current part is then complete.

Factors Affecting Semi-Dynamic Repeatability

Factors affecting semi-dynamic accuracy:

The robot accuracy is poor.
Unstable foundations lead to greater shaking.
Significant vibration sources exist around the device.
Fixture stability is poor.

Troubleshooting:

If the data quality is poor, you can use ImageJ software to help observe the positional changes of the same hole across multiple captures in the camera’s color images. Additionally, consider reducing the robot’s operating speed as needed.