1. Drilling parameters: The setting of drilling parameters is crucial. If the drilling speed is too fast, the drilling nozzle will break due to excessive force, and if the drilling speed is too slow, it will reduce production efficiency. Due to differences in the thickness, copper thickness, and material structure of PCB boards produced by various board manufacturers, PCBs need to be set according to specific circumstances. Select the most suitable drilling parameters through calculation and testing. Generally, for a 0.3mm drill bit, the cutting speed should be between 1.5-1.7m/min, and the drilling depth should be controlled between 0.5-0.8.

　　2. The cushion plate used for drilling aluminum sheets requires a moderate hardness, uniform thickness, flatness, and a thickness difference of no more than 0.076mm. If the distribution of the cushion plate's softness and hardness is irregular, it is easy to get stuck in the drilling nozzle. If the cushion plate is uneven, it will cause the pressure foot to not press tightly, causing the drilling nozzle to twist and break. In addition, the plate will also move along with the drilling nozzle during the up and down movement, and the drilling nozzle will break due to uneven force when returning the tool. Its function is:

　　(1) Suppress the occurrence of burrs inside the hole.

　　(2) Fully penetrate the PCB board.

　　(3) Reduce the temperature of the drilling nozzle and cutting edge to reduce drilling breakage.

　　The aluminum sheet used for drilling must have a certain degree of rigidity to prevent the plate from shaking when lifting the knife, and it needs to have corresponding elasticity. The drill bit immediately becomes soft at the moment of contact during drilling, which precisely aligns the drill bit with the position being drilled, without causing the drill bit to deviate from the original hole position and causing the drill bit to break.