Monday, November 23, 2009

Encoder Selection Notice

The encoder is divided into incremental rotary encoders and absolute rotary encoders. The following are two kinds of encoder installation Precautions Note:

Incremental Rotary Encoder selection should pay attention to three parameters:

(1) Mechanical installation dimensions, including location only the mouth of the shaft diameter, the installation holes; cable outlet way; installation space volume; work environment protection rating meets the requirements. Incremental Rotary Encoder selection should pay attention to three parameters:

(2) Resolution, that is, the work of the encoder output pulses for each lap number, is designed to be used to meet the required precision.

. (3) Electrical interface, the encoder outputs are push-pull output common mode (F-type HTL format) , the voltage output (E), open collector (C, common C for the NPN-tube output, C2 for the PNP-tube output), long-term driver outputs.

A manner that its output and its control system interface circuit match.

Absolute rotary encoders Selection Notice (1) of the mechanical parts: ① measuring length and angle measurement, the measured length of how mechanical conversion (there are some in the above description, such as the call is not clear to discussion). Absolute rotary encoders Selection Notice
Measured angle is within a 360-degree (single circle), or may be too 360 degree (multi-turn). Measured angle is 360 degrees inside the (single circle), or may be too 360 degree (multi-turn). The production process is in one direction rotating cycle to work, or back and forth direction of the work cycle. The direction of the production process is a rotating cycle to work, or back and forth direction of the work cycle. ② shaft connected to install the form, there are axial coupling through the soft link, or sleeve-type connections. ② shaft connected to install the form, there are axial coupling through the soft link, or sleeve-type connections. ③ use of the environment: dust, water vapor, vibration, impact? (2) Electrical part ① Connect the output of receiving part of that? ② signal form? ③ resolution requirements? ④ control requirements?

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