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How to quickly determine the stand or fall of speed encoder?

by:HENGXIANG     2020-11-26
How to quickly determine the stand or fall of speed encoder? Automation technology release date: 2019 - 3 - Browse 20 520 encoder is introduced to quickly determine speed encoder quality method is as follows: the encoder when stationary, can be measured the voltage of A and B phase is about 15 v or 0 v. Gently turn the encoder, should be able to get the above two kinds of voltage in turn. A - B - Corresponding to get or 0 v to 15 v voltage. The continuous rotary encoder, the output is the average voltage RMS, perhaps only about 3 ~ 5 v stable voltage value. Multimeter can only make a rough check, if the measured results differ with the above description is too large, you can preliminary think encoder has fault. But only use multimeter, cannot be accurately check the encoder is perfectly normal. Because when normal, encoder is the output of high frequency pulse signal, so suggest you had better use the oscilloscope to measure. Method is: will the output of the encoder is A phase or B # believe that received in the oscilloscope, and rotary encoder shaft, if at this point on the oscillograph observed 15 v high frequency square wave pulse signal, then the encoder is good. Also use multimeter gear test output voltage is normal, the encoder for NPN output: when measuring the positive and the signal output power line, the transistor set ON the output voltage closer to the power supply voltage, the transistor set OFF when the output voltage is close to 0 v. Encoder for PNP output: when the measured anode and the signal output power supply line, the transistor set ON the output voltage is close to the power supply voltage, the transistor set OFF when the output voltage is close to 0 v, tear open come down to the encoder, in electric power, turn the encoder with the hand, observation screen displays the data at the same time, to see if there is any change, such as data does not change, the encoder is bad, if there are any changes, it proved that the encoder is good. Encoder generally charged monitoring. If the encoder can tear open come down to the best, after power on the rotary encoder with the hand, if we can according to the servo motor encoder numerical change movement proved to be good, if the electricity by hand after the rotation, numerical irregular change or not change is the worst. Automation science and technology ( Shanghai) Co. , LTD. The main products are rotary encoder, photoelectric encoder, magnetoelectric encoder, composite encoder, bus encoder, absolute encoder, incremental encoder, miniature encoder, etc. A: on the accuracy of the servo encoder is introduced next article: mechanical photoelectric encoder how to choose the shape?
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