Take a look at the Heidenhain RCN8000 absolute encoder[Copy link]
Our salesperson said that a customer sent us a scrapped encoder. It was a Heidenhain encoder. They are the best encoders. I took it and saw that it had been completely disassembled. Let's take a look! Learn a little Let's take a look at the parameters first. The calculation time is less than or equal to 5us. This is quite fast. The low-bit encoder we made is only 50us. The encoder resolution can reach 27bit or 29bit. This thing should cost more than 100,000 yuan (I don't know the exact price).
Seeing the code disk broken like this, I really think this encoder is a waste. There are so many large holes on the main body. It seems that they are reserved for receiving encoders of other digits. It seems that it uses photocells.
The light is emitted by 5 light emitting tubes + lens, which reduces power consumption and increases reliability. The high-position encoder of the hollow shaft should generally use matrix codes, which have many light emitting tubes (more than ten or more than 20). I have also seen a 21-bit encoder made of useful pseudo-random codes.
The above diamond-shaped iron sheet is generally called a leaf spring or a spring, which plays the role of connection, buffering and shock absorption. This encoder is designed to connect the encoder body and the shell.
I can't find some of the components on the circuit board. The ones with silk screen number 41A, like triode, are used to control the light-emitting tube, especially 1212MWM, which may be the self-produced chip
The details of the slit are a little unclear. There are more than ten code channels (the matrix code has only six or seven code channels, and the vernier code has fewer (three circles of code channels). I haven't seen any encoder with a large aperture)
41A.pdf(382.06 KB, downloads: 10)
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