Draw Wire Measurement Principle
Draw wire displacement sensors measure linear movements using a highly flexible steel cable. The cable drum is attached to a sensor element which provides a proportional output signal.Measurements are performed with high accuracy and high dynamic response, and the measuring drum is axially coupled with a multi-turn potentiometer, an incremental encoder, or an absolute encoder, thus, a linear movement is transformed into a rotary movement and then converted into a resistance change or into countable increments.The use of high quality components guarantees a long life cycle and high operational reliability. GI-D20 Series encoder is a 0-1200mm measurement range high accuracy draw wire sensor.The aluminum housing provides a reliable sensor ideal for industrial environments. Being both economical and compact, these are appropriate for a wide variety of applications.D20 Series provide extremely precise measurements because of the inherent accuracy of the encoders(both absolute and incremental encoders) and the rugged construction ensures reliable performance even under extreme conditions. Measurements are highly accurate, reliable and the systems have very long lifetimes without losing its inherent characteristics. ▶Size:50x50x76mm; ▶Measurement Range: 0-1200mm; ▶Supply Voltage:5v,8-29v,24v; ▶Output Format: Analog-0-10v, 4-20mA; Incremental:NPN/PNP open collector, Push pull, Line Driver; Absolute:Biss, SSI, Modbus, CANopen, Profibus-DP, Profinet, EtherCAT, Parallel etc. ▶Widely used in various fields of automatic control and measurement system,such as machinery manufacturing, shipping, textile, printing, aviation, military industry Testing machine, elevator, etc. ▶Vibration-resistant, corros With a draw-wire sensor, a linear movement is transformed into a rotary movement. The free end of the wire is attached to the movable body. An optional eyelet at the free end of the wire can be screwed onto or attached to the measurement object. The rotary movement produced by drawing out the wire is converted into an electrical signal using a rotary encoder. A spring motor provides sufficient pre-tension of the wire. The spring motor is a coil spring with torque load, similar to those used in mechanical watch mechanisms. The further the wire is drawn out, the higher the tensioning force of the spring. In horizontal mountings, this has the benefit of minimising wire sag.| Product characteristics | ||
| Size: | 50x50x76mm | |
| Measurement Range: | 0-1200mm; | |
| Electrical Data | ||
| Output Format: | Analog: 0-10v, 4-20mA;Incremental:NPN/PNP open collector, Push pull, Line Driver;Absolute:Biss, SSI, Modbus, CANopen, Profibus-DP, Profinet, EtherCAT, Parallel etc. | |
| Insulation resistance | Min 1000Ω | |
| Power | 2W | |
| Supply Voltage: | 24v | |
| Mechanical Data | ||
| Accuracy | 0.2% | |
| Linear Tolerance | ±0.1% | |
| Wire Rope Dia. | 0.6mm | |
| Pull | Min.10N | |
| Pulling Speed | Max.100mm/s | |
| Working Life | Min.50000h | |
| Case Material | Metal | |
| Cable Length | 1m 2m or as per requested | |
| Environment Data | ||
| Working Temp. | -25~80℃ | |
| Storage Temp. | -30~80℃ | |
| Protection Grade | IP54 | |
| Dimensions |
Note: ▶Adopt elastic soft connection shall be applied between encoder shaft and output shaft of user end to avoid damage of encoder shaft system due to serial movement and run out of user shaft. ▶Please pay attention to the allowable axle load during installation. ▶Make Sure that the difference Between Axial Degree of encoder shaft and user output shaft shall be no more than 0.20mm, and the deviation angle with axis shall be less than 1.5 °. ▶Try to avoid knocking and falling collision during installation; ▶Do not connect the power line and the ground wire in reverse. ▶The GND wire shall be as thick as possible, generally larger than φ 3. ▶Output lines of encoder shall not be overlapped with each other to avoid damaging output circuit. ▶Signal line of encoder shall not be connected to DC power supply or AC current to avoid damaging output circuit. ▶The motor and other equipment connected to the encoder shall be well grounded without static electricity. ▶Shielded cable shall be used for wiring. ▶Before starting the machine, carefully check whether the wiring is correct. ▶During long-distance transmission, the signal attenuation factor shall be considered, and the output mode with low output impedance and strong anti-interference ability shall be selected. ▶Avoid using in strong electromagnetic wave environment. 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. Packaging Details The rotary encoder is packed in standard export packaging or as required by buyers; FAQ: About Delivery: Leading time: Delivery can be within a week after full payment by DHL or other logics as per requested; About Payment: Payment can be made through bank transfer, west union and Paypal; Quality Control: Professional and experienced quality inspection team leaded by Mr. Hu, can ensure the quality of each product when it leaves the factory.Mr. Hu has more than 10 years experience in the industries of encoders, About technique support: Professional and experienced technique team leaded by Doctor Zhang, has accomplished many breakthroughs in the development of encoders, apart from normal incremental encoders, Gertech now has finished Profinet, EtherCAT, Modbus-TCP and Powe-rlink development; Certificate: CE,ISO9001,Rohs and KC is under process; About Inquiry: Any inquiry will be replied within 24 hours, and customer also can add what's app or wechat for Instant messaging, our marketing team and technical team will offer professional service and suggestion; Guarantee policy: Gertech offers 1year warranty and life-long technical support; We're here to help. Our engineers and encoder experts will respond quickly to your toughest, most technical encoder questions. Expedite options are available on many models. Contact us for details:Terry_Marketing@gertechsensors.com;