1. The concentricity of the steel bar and the rolling head of the nail making machine is not the same, so it is necessary to improve the damage of the accessories by correcting the concentricity; 2. That is, the reset of our commonly used nail making machine is not in position. It ’s complicated, we need to remove the thread rolling head, clean and refuel at the same time, and then install it again; 3. There is also a problem with the material of the accessory, which we have no way to repair, only Replace the accessory to solve this problem. If the reinforcing bar does not have a cutting head, the same situation will occur. This is also a reminder that we are using a toothless saw to cut and process the reinforcing bar end and process the wire.