What is the solution for RDC6555G cutting with a protrusion at the starting position?

It should be that your initial power is too high. Try using the initial power suppression function

The problem may occur in the setting of cutting starting points, jump point path planning, or laser pre ignition parameters, resulting in uneven heating of the material, especially on thin plates or sensitive materials.

At the beginning of processing, if the cutting head fails to make smooth contact with the material surface, it may cause obvious raised marks at the starting position, which may be due to inaccurate zero calibration of the system.