# Scanning Cartographer implements a Klipper [probe](https://www.klipper3d.org/Config_Reference.html#probe) interface and exposes functionality similar to what you'd expect from an induction probe, with the benefit of eddy current for accurate measurements. This means that homing, `QUAD_GANTRY_LEVEL` and `Z_TILT_ADJUST`, simply works as expected, but looks slightly different. Cartographer will lower until the trigger point of 2 mm and will then take 20 readings of the frequency to determine the exact distance.\ This means there is on reason to lift the probe and run a probing move again. #### Measure probe accuracy We can check the accuracy of the scan by running `PROBE_ACCURACY`.\ This will run a few probes and output some statistics, like seen below. > probe accuracy results: maximum 2.000898, minimum 1.999665, range 0.001233, average 2.000008, median 1.999758, standard deviation 0.000449 ## Bed mesh calibrate We can make use of the probes ability to take rapid measurements by scanning as we move quickly across the bed. After setting up Cartographer, your `BED_MESH_CALIBRATE` macro will by default do this. To take full advantage, we should increase the density of the mesh. We should be able to move across the bed with a speed of at least 300 mm/s. To fall back to the default Klipper behavior, run `BED_MESH_CALIBRATE METHOD=automatic` . --- # Agent Instructions: 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.cartographer3d.com/cartographer-probe/features/scanning.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.