Laser marking machine may have different effects depending on the material. This is not necessarily solved by changing the parameters. But we can still try to modify the parameters.
1. Adjust the speed and power in marking software ezcad.
Change the marking speed to 100. The lower the speed, the deeper the marking depth will be.
Of course this is also related to power. The more power, the deeper it mark. Adjust the power value to 100%.

2. Change the laser.
Change the laser to a high power, such as a 50 watt 100 watt or higher power laser marking machine.
The depth of marking are different on different materials. This is almost impossible to control through a parameter. So we’d better make multiple parameters and multiple changes to test its depth and how deep it can mark.