Common problems and solutions for engraving machines: 1. Engraving is mis-placed, 2. Engraving patterns are reversed, 3. Engraving patterns are irregular. 4.1 The engraving misalignment is caused by the mismatch of software configura-tion parameters, which causes the engraving machine to run too fast. Solution: Reconfigure the software parameters and run the engraving machine to see if it can return to normal. If it does not recover, it may be that the motor drive voltage does not match. Check the drive voltage with a multi-meter (the normal value of the X-axis drive voltage is 0.8V, Y The normal value of the shaft drive voltage is 1.4V.) The driving voltage adjustment method is as follows: Vref measures the intermediate voltage between GND and the volt-age meter. Rotate the potentiometer clockwise to decrease the current, and counterclockwise to increase the current. 4.2 The engraving pattern is reversed due to incorrect software configuration parame ters. Method: Re-import LaserGRBL through the configuration file in TF card. 4.3 Irregular carving patterns are caused by machine assembly problems. Method: 1. Please check whether the X axis of the engraving machine is parallel to the bottom frame and whether the bottom frame is parallel and the diagonal size. 2. Please check whether the X-axis laser head module shakes. If there is shaking, please adjust the eccentric nut of the POM wheel to ensure that the laser head module slides smoothly.