Encoder parameters
The main parameters of the encoder are as follows:
1. Mechanical installation dimensions: including positioning stop, shaft diameter, mounting hole position; cable outlet method; installation space volume; whether the working environment protection level meets the requirements.
2. Resolution: This refers to the number of pulses output per revolution of the encoder during operation, and whether it meets the accuracy requirements of the design.
3. Electrical Interface: Common encoder output methods include push-pull output (F-type HTL format), voltage output (E), open collector (C, commonly C is for NPN transistor output, C2 is for PNP transistor output), and long-line driver output. The output method should match the interface circuit of its control system.
4. Power input and output signals, such as current and voltage.
Encoder Model Description
Encoders are a common type of human-computer interaction input device, mainly divided into two categories: photoelectric encoders and contact encoders. Today, we will mainly share with you the models and naming rules of contact rotary encoders.
Many encoder manufacturers do not have industry-wide standards for encoder models and naming; instead, they create their own standardized models. The following example of a rotary encoder will be used to explain the model naming specifications, which also apply to rotary encoders.
As shown in the figure below: RE1103IC1-H01-0006(15P30, AA9F4) This is a typical complete encoder model.
A: RE is the code for encoder. Different manufacturers have different naming rules, so the code may vary. For example, RE is the first letter of the English word "rotary encoder".
B: The key size of the appearance is 11, which refers to the size of a certain surface, which is about 11mm.
C: 03 is a thin base product with a switch. There are also products such as 00 thick base without a switch, 01 thick base with a switch, etc.
D: The shape code for the bushing, which is a 35mm long unthreaded bushing. Other options include 7mm, 5mm, and 10mm bushings with or without threads. E: The bracket code, where C bracket indicates a plug-in mounting method, the bracket leg width is 2.0mm, and the total span of the bracket legs is 13.2mm. There are also 2.5mm wide bracket legs with a span of 12.9mm and surface mount bracket legs, etc.
F: indicates whether the bottom cover has positioning posts; 1 indicates no posts. There are also options like 2 indicating two positioning posts, 3 indicating two large positioning posts, and so on.
G: Terminal pin type, H01 represents a vertical insertion pin. There are also V01 and other parameters such as the number of terminal pins, terminal pin shape, and terminal pin span. H: Internal serial number, the information of which is shown in parentheses.
1: Pulse count, which represents the pulse information of the product. Different types of encoders have different pulse counts, such as 9 pulses, 12 pulses, 15 pulses, 20 pulses, 24 pulses, etc.
J: The direction of pulse output, indicating whether the pulse is output through clockwise or counterclockwise rotation. P represents clockwise rotation, and T represents counterclockwise rotation.
K: Positioning quantity, representing how many positioning points are in this rotation, which is also the gear feel. The positioning quantity and the number of pulses must appear in a ratio of 1:1 or 2:1.
L: Shaft shape, A represents D-shaped half shaft, K represents plum blossom tooth broaching shaft, etc.
M represents the shaft material, A represents aluminum alloy, B represents zinc alloy, C represents copper, D represents stainless steel, L represents plastic, etc.
N: 15 represents the actual installation height, from the PCB to the top. O: F represents the direction of the spindle opening, which is generally only found on A-axis D-shaped half-shafts.
P:7 represents the length of the operating part of the shaft core. N and Q can be selected according to specific actual requirements.
The above code combinations constitute a complete product model. Each manufacturer has different naming rules. In reality, buyers only need a few key pieces of information. Especially for new projects, it is best to provide your requirements and let the manufacturer recommend a model. If you are looking for a substitute, you need to go through a detailed matching process.
