Observes the mechanical motion of the actuator shaft—a change of position and the rate of change. Converts the mechanical input into an electrical impulse and transmits a series of such impulses as a quadrature signal to a controller.

A servo motor, by definition, is under closed loop control. The term closed-loop control implies something that measures something else (a quantity, like position or velocity or angular rotation) that can change, and then tell a computer what it measured. The computer then tells the motor to move either forward or backward to create a desirable behavior (that was pre-programmed) based on the measurement that was reported to it. So an encoder is an example of that 'something that measured something else'. An encoder is technically a generic term that means 'something that encodes (measures) something else'. In the case of high-end servo motors, it usually refers to optical encoders (disc-type). Toy servos use a simple potentiometer, and high-quality/industrial servo motors use hall effect sensors (amongst other things). So, we need encoders in servo motors to provide a measurement to the controller (computer) so that it can correct for any undesirable behavior.

Five steps let you know how to select your encoder: 1.If you’ve already used encoders with other brands, plz feel free to send us the information of the brand info and encoder info, like model no, etc, our engineer will advise you with our euqivalent replacement at a high cost performance; 2.If you want to find an encoder for your application, plz first select encoder type: 1) Incremental encoder 2) Absolute encoder 3) Draw Wire Sensors 4) Manual Pluse Generator 3. Choose your output format(NPN/PNP/LINE DRIVER/PUSH PULL for incremental encoder) or interfaces(Parallel, SSI, BISS, Modbus, CANopen, Profibus, DeviceNET, Profinet, EtherCAT, Power Link, Modbus TCP); 4. Select the resolution of the encoder, Max.50000ppr for Gertech incremental encoder, Max.29bits for Gertech Absolute Encoder; 5. Select the housing Dia and shaft dia. of the encoder; Gertech is popular equivalent replacement for similar foreign products such as Sick/Heidenhain/Nemicon/Autonics/ Koyo/Omron/Baumer /Tamagawa/Hengstler /Trelectronic/Pepperl+Fuchs/Elco/Kuebler ,ETC.   Gertech Equivalent replace: Omron: E6A2-CS3C, E6A2-CS3E, E6A2-CS5C, E6A2-CS5C, E6A2-CW3C, E6A2-CW3E, E6A2-CW5C, E6A2-CWZ3C, E6A2-CWZ3E, E6A2-CWZ5C; E6B2-CS3C, E6B2-CS3E, E6B2-CS5C, E6A2-CS5C,E6B2-CW3C, E6B2-CW3E, E6B2-CW5C, E6B2-CWZ3C, E6B2-CWZ3E, E6B2-CBZ5C; E6C2-CS3C, E6C2-CS3E, E6C2-CS5C, E6C2-CS5C,E6C2-CW3C, E6C2-CW3E, E6C2-CW5C, E6C2-CWZ3C, E6C2-CWZ3E, E6C2-CBZ5C; Koyo: TRD-MX TRD-2E/1EH, TRD-2T, TRD-2TH, TRD-S, TRD-SH, TRD-N, TRD-NH, TRD-J TRD-GK, TRD-CH Series Autonics: E30S, E40S, E40H,E50S, E50H, E60S, E60H Series   Packaging Details The rotary encoder is packed in standard export packaging or as required by buyers;   FAQ: 1) How to select an encoder? Before ordering encoders, you could clearly know which type of encoder you may need. There are incremental encoder and absolute encoder, after this, our sale-service department would better work for you. 2) What specifications are requested before order an encoder? Encoder type—————-solid shaft or hollow shaft encoder External Diameter———-Min 25mm, MAX 100mm Shaft Diameter—————Min shaft 4mm, Max shaft 45mm Phase & Resolution———Min 20ppr, MAX 65536ppr Circuit Output Mode——-you could choose NPN,PNP,Voltage, Push-pull,Line driver, etc Power Supply Voltage——DC5V-30V 3) How to choose a right encoder by yourself ? Exact Specification Description Check The Installation Dimensions Contact Supplier to get more details 4) How many pieces to start ?  The MOQ is 20pcs .Less quantity is also ok but the freight  is  higher. 5) Why choose “Gertech” Brand Encoder? All encoders are designed and developed by our own engineer team since year 2004,and most of the electronic component of encoders are imported from overseas market. We own the Anti-static and no-dust workshopand our products pass the ISO9001. Never let our quality down,because quality is our culture. 6) How long is your lead time? Short lead time—-3 days for samples,7-10days for mass production 7) what is your guarantee policy? 1year warranty and life-long technical support 8)What are the benefit if we become your agency ? Special prices, Market protection and supporting. 9)What is the process to become Gertech agency? Please send us enquiry,we will contact you as soon as possible. 10)What is your production capacity? We produce 5000pcs every week.Now we are building second phrase production line.