# Fixturing

By default, every image acquisition uses a root coordinate space with the origin of the coordinate system located at the upper-left corner of the image. If no other coordinate space is defined with fixturing, all tools in the EasyBuilder tool chain produce results in the root coordinate space.

However, if the tools in your job operate using root coordinate space, they can only produce good results if the inspected objects always appear in the same location and position on the acquired images. To account for differences in the location or position of the inspected objects, you have to add a fixturing tool to the beginning of the tool chain.

Fixtures align the operating coordinate space to a found feature on each individual acquisition. To create a fixture, add a Locate tool to your tool chain. For example, you can add a Circle Fixture tool to identify the same circle on every inspected object, and create a fixtured coordinate space for that image acquisition where the origin of the coordinate system is in the center of the found circle.

All tools that are after the fixturing tool in the tool chain operate using the fixtured coordinate space of each individual acquisition.

For more information about fixturing tools, see Locate Tools.