# Circle Fixture

The Circle Fixture tool allows you to find a circle and use it as a fixture. The X, Y of the fixture is the center of the circle and the fixture provides no angle information. This fixture works for only translation on the X, Y plane.

To use the Circle Fixture tool:

1. Open the Inspect tool palette, expand the Locate tool group, and select the Circle Fixture tool.

2. Select a circle. The selected circle is indicated with purple.

3. Click OK.

The tool creates a fixture from the selected circle.

To adjust the circle settings:

Use the Polarity setting to change the direction of edge finding between dark and light areas. The available options:

- black-to-white

- white-to-black

- either (default)

Adjust the Accept Threshold to change the acceptance threshold for finding features in your images, such as patterns, circles, and edges.

- Decrease the threshold to accept both strong matches and weaker matches.

- Raise the threshold to only accept stronger matches and ignore weaker matches.

To adjust the Accept Threshold:

- Use the slider.

- Or enter a numerical value into the box.