In the selection of cam indexer model at the same time, will certainly choose the cam indexer reducer reduction ratio, today we take this opportunity to discuss the cam indexer reducer reduction ratio.
According to the working condition of the customer cam indexer, we know the rotation time of rotating the turntable to rotate one station. According to the site above "cam indexer drive angle why often choose 270 degrees? detailed explanation, we have a clear idea that the rotation time + standstill time (default drive cam indexer motor continuous operation without stopping) = input shaft rotation time, since we know the input shaft rotation time, through the unit of conversion (elementary school knowledge, haha), then you can calculate the number of revolutions of the input shaft is how much (the unit of rotation speed is rpm), calculated after the speed reducer output rotations Then divide the number of motor revolutions by the number of speed reducer output revolutions for the speed reducer reduction ratio. It should be added that the standstill time is calculated by the ratio of the standstill angle to the drive angle.
If the rotation time is 1 second, the standstill time is 3 seconds. First of all, we have to determine the drive angle, the ratio of static and dynamic time is 1:3, then we choose the drive angle of 90 degrees, the stationary angle of 270 degrees, this is right, as if there is no problem, in fact, there is a problem. As we said, the cam indexer drive angle the larger the smoother the operation, the drive angle of 270 degrees is best, 90 degrees is too small, it is best not to choose, otherwise the operation is not smooth resulting in jitter is the probability of phenomena.
It is recommended to choose the drive angle of 270 degrees. At this point you have another problem came up, the drive angle of 270 degrees, the stationary angle of 90 degrees, static ratio is not 3:1, not my initial 1:3 ah, you forget, we can stop the motor to extend the cam indexer of the rest time ah, that is, the rotation time of 1 second, the rest time of 1/3 seconds, and then by stopping the motor to extend the rest time to 3 seconds can be.
Turning time 1 second + stationary time 1/3 second = input shaft rotation time, that is, the input shaft rotation of a circle to 4/3 seconds, through the unit conversion, the input shaft rotation is 45 rpm, cam indexer input shaft rotation is the output speed reducer, that is to say, the speed reducer output rotation is 45 rpm.
Generally, the motor speed is 1400 rpm, reducer speed ratio = motor speed divided by reducer output speed = 1400 divided by 45 = 31, reducer speed ratio of 30 is close to that speed ratio selection 30.