

- Changchun Rongde Optics
- Co.,Ltd.
- Add:No.1666 Yaan Road,
- North Lake Development District,
- Changchun 130102,China
- Tel:86-431-81881745
- Fax:86-0431-85256892
- E-mail:rongdecui@roundss.net
- Skype:adacui_roundss
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Why do we chooes absolute encoder?!
Changchun Rongde Optics Co.,Ltd. Release time:2016/4/23 Browse:820Incremental rotary encoder rotates the output pulse by counting device to calculate its position, when the encoder does not move or power outage, counting on internal memory to remember the location of the device. Thus, when the power failure, the encoder does not have any movement, when work calls, encoder output pulse process, it can not have lost the pulse interference, or counting device will calculate and zero offset memory, and this species offset amount is impossible to know in order to know the results only after errors occur.
The solution is to increase the reference point, the encoder after every reference point, the reference position correction position count into the memory device. In the previous reference point, it is not guarantee the accuracy of the location. In the industrial in there every operation to go first reference point, turn the change and other methods.
Such methods for some industrial projects too much trouble, not even allowed to give change boot (boot will know the exact position), there are some conditions are not allowed due to interference effects arising from the wrong place, so there is an absolute encoder It appears.
There are many passages dynasty engraved lines on the absolute value of the optical encoder rotary encoder, each groove successively with 2 lines, 4 lines, 8 lines, 16 lines. . . . . . Choreography, so that in every position of the encoder, by reading the engraved lines per channel through the dark, get a unique set of binary coded 2 ^ n-1 from zero to the power of 2hexadecimal code (Gray code), which is called n-bit absolute encoder. Such an encoder is determined by the mechanical position of the optical encoder, it is not a power outage, the impact of interference, because each absolute encoder position determined by the mechanical position is unique, it requires no memory, no need to find a reference point, and it would not have to count, when you need to know where and when to go read its position. Thus, anti-jamming features of the encoder, greatly improving the reliability of data
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