Main Control ChipAdopt STMicroelectronics' latest G0 series main control chip STM32G0B1RET6 or STM32G0B0RET6; Add thermistor interface protection circuit to prevent damage to the main control chip. Three CNC FanIncrease the heat dissipation controllable fan to reduce the printer temperature when the device is working; The fan port needs to ensure that the fan voltage specifications are consistent with the motherboard power supply, otherwise the fan will have no voltage.