For example,the welding machine hits the maximum welding current (rated current),working time is 10 minutes as a cycle, working for 6 minutes and resting for 4 minutes to repeat the cycle, the welding machine is just not protected from damage, the load continuity rate is 60%. The duty cycles of DIY MMA inverter welders are mainly 35%,50%,because the size of welding material for DIY is generally small, it does not need a long time of continuous welding.