Description

If you want to build a project where the machine can control the speed of the conveyer belt as well as the direction of movement, a rotary encoder is a must-have component. Keeping this in mind,Robodo.inis introducing the brand new orange 400PPR 2-PhaseIncrementalOptical Rotary Encoderat a competitive price.

A rotary encoder is a type of position sensor which is used for determining the angular position of a rotating shaft. It generates an electrical signal, either analog or digital, according to the rotational movement.

Orange 400PPRIncrementalOptical Rotary Encoderis a hi-resolution optical encoder with quadrature outputs for increment counting. It will give2400 transitionsper rotation between outputs A and B. A quadrature decoder is required to convert the pulses to an up count. The Encoder is built to Industrial grade.

The Encoder comes with a Standard1.5 m cable lengthwhich can be extended with extra cable if needed.

Consider Adding Pull up resistor to both A and B phases of the encoder output to avoid the effect of interference in output and get the precise logical output value from the encoder Also adding a pull-up resistor to all phase output lines protects the open collector output-triode from damage due to direct Vcc supply short circuit.

Note: A sample tutorial code has been given in the Description Section.

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Power and Input Terminal Assignments:

Terminal Name Wire Color Description Phase A White Quadrature encoded output A Phase B Green Quadrature encoded output B VCC Red VCC should be connected to +ve of supply GND Black The ground should be connected to negative the supply Shield Golden The shield should be connected to GND

Shielding is important. Ata minimum, the cable should be protected either by a foil jacket with a drain wire or by a braided-wire shield that is grounded. For very sensitive applications or high-EMI environments, foil jacketed wires in combination with an overall braided-wire shield around the cable should be used to avoid interference and precise encoder output.

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Features :

1. High cost-efficient advantages.
2. Incremental rotary encoder internal adopts ASIC devices
3. High reliability, long life
4. Anti-jamming performance
5. Small size, lightweight, compact structure
6. Easy installation
7. Stainless steel shaft, High resolution, High quality, line interface with waterproof protection

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Tutorial Code:

//these pins can not be changed 2/3 are special pins
int encoderPin1 = 2;
int encoderPin2 = 3;

volatile int lastEncoded = 0;
volatile long encoderValue = 0;

long lastencoderValue = 0;

int lastMSB = 0;
int lastLSB = 0;

void setup() {
Serial.begin (9600);

pinMode(encoderPin1, INPUT);
pinMode(encoderPin2, INPUT);

digitalWrite(encoderPin1, HIGH); //turn pullup resistor on
digitalWrite(encoderPin2, HIGH); //turn pullup resistor on

//call updateEncoder() when any high/low changed seen
//on interrupt 0 (pin 2), or interrupt 1 (pin 3)
attachInterrupt(0, updateEncoder, CHANGE);
attachInterrupt(1, updateEncoder, CHANGE);

}

void loop(){
//Do stuff here

Serial.println(encoderValue);
delay(1000); //just here to slow down the output, and show it will work even during a delay
}

void updateEncoder(){
int MSB = digitalRead(encoderPin1); //MSB = most significant bit
int LSB = digitalRead(encoderPin2); //LSB = least significant bit

int encoded = (MSB << 1) |LSB; //converting the 2 pin value to single number
int sum = (lastEncoded << 2) | encoded; //adding it to the previous encoded value

if(sum == 0b1101 || sum == 0b0100 || sum == 0b0010 || sum == 0b1011) encoderValue ++;
if(sum == 0b1110 || sum == 0b0111 || sum == 0b0001 || sum == 0b1000) encoderValue –;

lastEncoded = encoded; //store this value for next time
}

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Specification:

Model No.:

3806-OPTI-400-AB-OC

Encoder Type

Incremental

Operating Voltage (VDC):

5 ~ 24

Current Consumption (mA):

40

Maximum Speed

5000 RPM

Pulse Per Revolution (PPR)

400

Counts Per Revolution (CPR)

2400

Operating Temperature (C)

-24 to 84

Output Phase

AB

Protection Standard

IP52

Shaft Type

D Type, Solid

Shaft Length (mm):

12

Shaft diameter (mm):

6

Mounting Hole (mm)

M3

Weight (g):

121

Body Dimensions (D x L) mm

40 x 38.40

Cable Length (m):

1.5

Shipping Weight 0.19 kg Shipping Dimensions 10 8 5 cm

Package Includes :

1 x Pro-Range 400 PPR 2-Phase Incremental Optical Rotary Encoder