What is an electronic gear? How does it change the pulse frequency? -Solutions - Huaqiang Electronic Network

Photocoupler

1. What is an electronic gear? How does it change the pulse frequency?

2. The essence of the electronic gear is a binary counter:

1) 17-bit binary counter, we are numbered from the lowest digit, and the 17-bit binary counter consists of 1 bit, 2 bits, 3 bits, ..., 17 bits. Just like the familiar decimal digits, there are one bit, ten bits, Hundreds, thousands, ...

2) Binary counter, each bit can only output 0 or 1. When counting, each digit continuously changes from 0 to 1, and then changes from 1 to 0. At this time, a rectangular pulse is output.

3) When we input a rectangular pulse to the counter, the counter starts counting the input pulses, and you will find that the number of pulses output by each digit is different:

For example, when we input 131072 pulses, the number of pulses output by each digit is:

1st place: 131072

2 digits: 65536

3 digits: 32768

4 digits: 16384

5 digits: 8192

6 digits: 4096

7 digits: 2048

8 digits: 1024

9 digits: 512

10 digits: 256

11 digits: 128

12 digits: 64

13 digits: 32

14 digits: 16

15 digits: 8

16 digits: 4

17 digits: 2

4) When we give a 17-bit binary counter, the input pulse frequency is 131072 / s, then the output pulse frequency of each bit of the counter is:

1st place: 131072/s

2 digits: 65536 / s

......

16 digits: 4 / s

17 digits: 2 / s

5) Then 18-bit, 19-bit, 20-bit, 21-bit counters, each pulse frequency is:

1st place: 131072/s262144 524288 10485762097152

2 digits: 65536 / s131072262144 524288 1048576

3 digits: 32768 / s65536 131072262144 524288

4 digits: 16384 / s32768 65536131072262144

5 digits: 8192/s16384 3276865536131072

6 digits: 4096 / s8192163843276865536

7 digits: 2048 / s 4096819216384 32768

8 digits: 1024 / s204840968192 16384

6) You found out that there is no 20-bit encoder that you actually bought at a big price, but the number of pulses and the pulse frequency of the 1-bit input of the counter are different;

7) 17-bit, 18-bit, 19-bit, 20-bit, 21-bit encoders, the essence is the same, the structure is the same, he can casually say the 17-bit encoder as a 20-bit encoder;

8) Of course, the 18-bit, 19-bit, 20-bit, and 21-bit counters are the same, but the encoder's reticle is different, that is, the number of pulses input to the counter is different.

9) Therefore, the number of engraved lines of the encoder is large, the process is complicated, the price is high, and the focus is not on the "bit" problem;

3. The principle of changing the frequency of the electronic gear is that the binary counter frequency division is changed from the low bit to the high bit output, and the multiplier is changed from the high bit to the low bit output;

4. The electronic gear changes the frequency, which can change the output frequency of the encoder, and can also change the frequency of the output of the upper computer;

5. If the electronic gear binary counter is installed on the encoder, it is convenient to change the feedback pulse frequency of the encoder output;

6. If the electronic gear binary counter is installed on the upper computer, it is convenient to change the command pulse frequency output by the upper computer;

7, so these related calculations, and the manufacturer's design has a decisive relationship, how they define, how to calculate, they have the final say;

8, so everyone understands the truth, there is no need to use a method to negate another method, the principles are the same!