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Hardware
4.2 Set the Laser Height to 21.0 mm and tap Save.
4.3 Go back to the APP List Screen, tap Calibration to redo Auto Focus. If the Touchscreen keeps showing
Failed, and several lines fail to be burnt out, lower the laser height (to 19 mm, for example), and try again.
If the problem persists, please contact us at support@snapmaker.com for further assistance.