The
cam indexer relies on the motor as the driving source. Commonly used are ordinary gear reduction motors, stepping motors, servo motors, etc. So, how to choose the reduction ratio of the motor?
The speed ratio of the motor used by the indexer is the speed change. Because the selection of the motor speed takes into account factors such as the load and torque of the indexer, the selected motor has a high speed and cannot meet the requirements for use. The speed needs to be adjusted to the required The speed can only be used. For example, if the reduction ratio is 1:20, the torque of its output shaft theoretically increases by 20 times, and the speed is reduced by 20 times. If the output of the motor is 3000 revolutions per minute, then after After the reducer, the speed is 150 revolutions.
The
indexer uses the deceleration ratio of a stepping motor. In theory, it is the transmission ratio of the motor deceleration device. It refers to the ratio of the instantaneous input speed to the output speed in the deceleration mechanism. The symbol "i" represents the deceleration ratio: for example, the reduction ratio is 1/64. , That is, if the stepper motor outputs a torque of 1N.m, the output torque converted by the gearbox is 64N.m, and of course the speed is reduced to 1/64 of the original speed. Generally, the expression method of reduction ratio is 1 as the denominator, and the ratio of input speed and output speed connected by ":". For example, the input speed is 1500r/min and the output speed is 25r/min, then the reduction ratio is: i= 60:1.
The reduction ratio of the general reduction mechanism used in the motor is marked with the actual reduction ratio, but some special reducers such as cycloid reducers or harmonic reducers are sometimes rounded up without the denominator, as the actual reduction ratio may be It is 28.13, and 28 is generally marked when labeling.
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