> For the complete documentation index, see [llms.txt](https://docs.quilter.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.quilter.ai/using-quilter/fabricator-constraints.md). # Fabricator constraints ### Overview Fabricator constraints are a subset of the overall constraints that define the minimum geometric thresholds a fabricator can apply when manufacturing your circuit board. Specifically, Quilter's fabrication rule profiles include the following: * Minimum trace width * Minimum trace clearance * Minimum drill hole size * Minimum annular ring size * Minimum edge-to-copper clearance ### How Quilter uses fabrication rules These are the **absolute minimums** that your fabricator will allow. Any smaller dimension defined later, including by specifying a netwidth, will be ignored or will generate a DRC violation. ### How to specify If using your own stackup, these will be read from your ECAD files. When using a Quilter stackup, these will be part of that definition. In the Quilter app, you can double click a value to edit it. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.quilter.ai/using-quilter/fabricator-constraints.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.