Can servo and stepping improve the accuracy of cam indexers

Engineers who are accustomed to using servo motors or stepping motors as drive sources are mainly because these types of motors have higher precision and are more convenient for electronic control and selection. So, does the use of a servo or a stepping motor to drive the cam indexer affect the accuracy of the indexer? Can the indexer and the entire automation system be more accurate?

We know that stepping and servo motors mainly rely on control pulses to control the rotation angle. Servo motors control the length of the pulse time to achieve corner control, and stepping motors control the number of pulses to control the rotation angle. Corresponds to a step angle. The accuracy of these two types of motors is higher than that of ordinary geared motors. Therefore, in common sense, using servo and stepping to drive the indexer may increase the accuracy of the cam indexer. This is a completely wrong view.

The accuracy of the cam indexer comes from the special structure of the arc cam. The input cam ribs of the indexer and the output turret rollers are engaged and divided mechanically. It is a fixed mechanical cycle. The input shaft and the input cam continuously rotate, and the output shaft For intermittent output, the completion of a complete set of mechanical actions is the result of the fixed mechanical structure of the indexer itself combined with the mechanical action. Therefore, the indexer maintains its mechanical properties in terms of mechanical movement and mechanical accuracy. In this case, any driving source will not affect it, including the station, accuracy, driving angle, etc.

Therefore, we say that the choice of cam indexer drive source can completely meet the requirements of use with an ordinary gear reduction motor. This is the reason. From the perspective of cost, the use of servo motors or stepping motors is used to drive intermittent motions. The indexer may be a little overkill, but if you use an indexer with a 360-degree drive angle, Lianyin engineers recommend using these two types of motors.