# Calibration Home the machine in X and Y: ``` G28 X Y ``` Position the nozzle in the center of the bed. You will need to adjust the coordinates for your machine. ``` G0 X125 Y125 ``` Start the calibration process: ``` IDM_CALIBRATE ``` You can either use the web interface to adjust the nozzle height from the bed, or `TESTZ Z=-0.01` to lower it. \ \ Use a piece of paper or a feeler gauge to measure the offset. Once finished remove the paper/gauge and accept the position. ``` ACCEPT ``` Save the results to your config file. ``` SAVE_CONFIG ``` #### Initial Tests Home your printer. ``` G28 ``` You can test the accuracy. ``` PROBE_ACCURACY ``` You can also measure the backlash of your Z axis ``` IDM_ESTIMATE_BACKLASH ``` You can now run a Bed Mesh Calibration (I would advise doing either a `Z_TILT` or `QUAD_GANTRY_LEVEL` before. ``` BED_MESH_CALIBRATE ``` Your Cartographer is now calibrated and ready to go. --- # 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/archive/v1-rp2040-based-probes/cartographer-rp2040-1.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.