> For the complete documentation index, see [llms.txt](https://docs.cartographer3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cartographer3d.com/cartographer-probe/features/z-backlash-estimation.md).

# Z Backlash Estimation

We can measure any backlash on the z movements.\
This is useful to increase the precision on any moves done by the Cartographe3D plugin, but also useful to diagnose problems in Z motions, like belt tension and lead screws.

You can run `CARTOGRAPHER_ESTIMATE_BACKLASH CALIBRATE=1` to calibrate the backlash at your zero reference position.

Can move your toolhead to anywhere on the plate and run `CARTOGRAPHER_ESTIMATE_BACKLASH` for that position. Your backlash should be similar on all spots on your plate.\
A good test is to run backlash estimation close by your mounting points for whatever drives your Z.


---

# 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 by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.cartographer3d.com/cartographer-probe/features/z-backlash-estimation.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.