Channel steel punching machine in use, as long as the various parameters are set according to the demand, it can automatically punch the material, improve work efficiency and save manpower. However, when the channel steel punching machine is running, its punch can produce high-speed movement and has strong impact force. Therefore, in order to improve production safety, the following inspection should be done before use.     If the power circuit and voltage are abnormal, it will cause different degrees of damage to the punching machine equipment. Therefore, before operating the channel steel punching machine, the power supply circuit and voltage must be checked first. Only when all the circuit facilities are normal and the voltage meets the requirements, can the power supply be connected to make the channel steel punching machine power on and power on.     The main composition system channel steel punching machine equipment has several very important constituent systems, respectively is the lubrication system, the hydraulic system and the compressed air system, the good operation of the lubrication system can reduce the wear of important transmission parts in the equipment, before starting to operate the channel steel punching machine, the staff need to carefully check these working systems to ensure lubrication The oil quantity, oil pressure and air pressure of oil and hydraulic oil meet the operation requirements.     Safety protection device because channel steel punching machine will produce strong impact force during operation. In order to ensure the operation safety of staff, channel steel punching machine is usually equipped with perfect protection device. Therefore, it is necessary to check the protection device before use. If the protection device is not normal, it can not be started up and needs to be repaired. When starting the punching machine, the operator should also ensure that there is no other personnel and debris in the working range of the machine tool. Before using the channel steel punching machine, the staff check the power supply circuit to protect the equipment from abnormal current damage and avoid accidents caused by staff. The purpose of checking the main system components is to ensure that the punching operation can be carried out smoothly and reduce the wear and damage to the equipment. Therefore, in the channel steel punching machine before use to check all aspects.