Cam is a fitting spring power transmission system, a cam for adjusting machine master the technology is relatively high, but not convex turbine all adopt servo motor independent control of each station, debugging is relatively much more convenient. Cam arm position is relatively fixed, the internal space relative to the cam machine is small, so, many special products is not good, easy to hit the knife, but no cam arm can be disassembled in the panel to any location, trajectory staggered molding products, and this is no different from the cam of the cam second advantages, ability to do special-shaped spring strong convex turbine; a motor drives the cam to rotate all, each run an action, all cam to a turn, and no cam machine, arm alone operation, travel set free, there is no effective action, the speed of fast, this is no cam different from the cam third advantages. Therefore, no cam and spring machine shaft, is a trend in the development of spring machinery industry, in the long run, no cam spring machine more practical, more long-lasting durability, now with no cam mechanism, 10 years will not be backward! More and more well-known domestic manufacturers has been the introduction of camless equipment, is the best proof.