It sounds like you're experiencing some issues with your Sovol SV06 and the Mainsail/Klipper setup. Here are some suggestions to help troubleshoot your problem:
Check your G-code commands: Make sure you're using the correct G-code commands for your firmware. The "PROBE_CALIBRATE" and "SAVE_CONFIG" commands seem to be working fine, but "TESTZ" might not be a valid command. Refer to the Mainsail and Klipper documentation or firmware configuration files to find the correct command for testing Z-axis movement.
Verify your Z-offset: Double-check that the correct Z-offset value is being applied. If the Z distance is consistently incorrect after running "PROBE_CALIBRATE," there might be an issue with your probe or its connection. Ensure that the probe is properly connected and functioning correctly. You may also want to re-run the calibration process to see if it provides consistent results.
Update firmware and software: Ensure that you're using the latest firmware version supp...
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