Stepper motor speed change measurement

Source:Industry News     Release time:2022-06-07     Clicks:     Popular:Reduction motor manufacturer

步进电机

The use of stepper motors is roughly divided into position control and speed control. The speed range of speed control can be variable speed control or constant speed from low speed to high speed, but there is the problem of speed change.


This is a measurement of the speed change rate, measured with equivalent inertia or friction torque based on the actual load inertia, to approximate the actual usage value. Especially when the inertia is large, the speed change rate (also called stall, jitter, swing, etc.) is also large. Therefore, we must pay attention to the speed operating range of the stepper motor. The faster the speed, the smaller the speed change rate.


This measurement method is roughly divided into a method using an encoder and a laser measurement method. When using an encoder, pay attention to the concentricity of the encoder axis and the coupling of the stepper motor, and also consider the influence of the encoder inertia. To calculate the speed change rate, first count the number of pulses in the encoder per unit time one by one, and then calculate the speed change rate.


Using the laser measurement method, a disc is installed on the stepper motor. The disc reflects the laser beam, reflects the light back, and uses the Doppler effect to calculate the speed change. It is available on the market. If there are no special requirements to use an encoder for measurement, it is best to use a laser measuring instrument.


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