Technical Information Ver.2018-07 General MultiDimension Technology (MDT) Geartooth Encoder is a non-contact incremental encoder for spindle rotation speed or displacement measurement. The product uses independent research of the fourth generation magnetic sensing technology Tunneling Magnetoresistance (TMR) sensor Output signals are two orthogonal differential sin/cosine signals with an index signal and their inverse signals These series of products are designed for gears with different teeth number under 0.3/0.4/0.5module Gear is not included in the product Features Output signal level 1Vpp with high quality High frequency response,up to 1MHz With self-calibration function Temperature range from -20 C to 100 C Protection grade IP68 Advantages The internal components are fully encapsulated, and the metal housing ensures the maximum protection grade of the encoder No abrasion, vibration resistance and it can work in water, oil, dust and other severe environments Weak magnetic induction technology is adopted to prevent the gears from being magnetized, and the surface of the encoder is not easy to adsorb iron filings Large tolerance to air-gap and installation position by using high sensitivity TMR sensor chip Easy to install thanks to its inner self-calibration system Both Convex /Concave Tooth are capable for index shape Applications Rotary position and speed sensing in CNC machine Energy and power generation systems Railway traffic Elevators 1 5
Technical Data Electrical Data Vcc Supply Voltage 5±5% V Icc Input Current 20±1 ma No-load F Frequency Response 0~1M Hz To Working Temperature -20~100 C Ts Storage Temperature -30~110 C Vout Output Signal 1Vpp sin/cosine signals Aout Amplitude 1±10% V φout Phase Tolerance -5~5 Mechanical Data D Mounting Hole Distance 27 mm Using 2 M4 screws Gap Flight Distance 0.15/0.2/0.3 mm Corresponding to 0.3/0.4/0.5 Tol Mounting Tolerance ±0.05 mm modules respectively P Protection Grade IP68 Recommended Gear Data M Gear Module 0.3/0.4/0.5 mm Z Number of Teeth unlimited δ Width Min.10 mm Recommend 12mm Material ferromagnetic steel Recommend 45#steel Index Shape convex /concave tooth Recommend concave tooth Double-layer Tooth Width Ratio 1:1 Width of the index signal tooth is 6mm Gear Accuracy above level ISO8 Corresponding to level JIS4 Calculation method of gear parameters: Reference diameter (d) Circumference (c) Tooth pitch (p) d=mz (Reference diameter = Module x Number of teeth) z=d/m (Number of teeth = Reference diameter /Module) p=πm (Tooth pitch = π x Module) m=d/z(module = Reference diameter/number of teeth) 2 5
Description Output Signals The encoder outputs are 1Vpp differential sin/cosine signals. It has 6-way signals including A+A-B+B-Z+Z-. AB signals are two orthogonal differential sin/cosine signals. The following picture is the measured ABZ difference X-T signals. Number of Teeth In order to obtain accurate output waveform, the encoder should be selected according to different number of teeth. The recommended number of teeth is 128, 256, 512. When the difference is not large, the effect can be ignored. Installation Method The encoder adopts a miniaturized design, and the mounting hole is 27mm, which is compatible with most of the similar products on the market. The installation method is as follows: The following picture is the Lissajous-Figure of the measured X-Y signals. 1. Fix the encoder using 2 M4 screws. The screws are still not firmly tightened. The encoder should be loose. 2. Use a feeler to adjust spacing. 3. Keep close and pull out the feeler. Due to its inner self-calibration system, as long as the installation air gap is ensured within tolerance, the encoder output signal is totally available. Cable Gear Module These series of products are designed for gears with different teeth number under 0.3/0.4/0.5 module. The encoder adopts 8 core shielded twisted pair line. The cross section of the cable core is 0.14mm 2,and the outer diameter is 5.1±0.2mm. Standard cable length is 1m and other length can be customized. The following table shows the recommended installation gaps. Gear Module Flight Distance Mounting Tolerance 0.3 0.15mm ±0.05mm 0.4 0.2mm ±0.05mm 0.5 0.3mm ±0.05mm 3 5
Illustration Dimensions * Cable outlet can be customized according to the customer demand. Installation Position Index upward Depth: 2mm Drilling and Milling drawing 4 5
Connection GE-A GEARTOOTH ENCODER Connection Type L=1m * Cable length can be customized according to the customer demand. Connection Definition 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 VA+ VA- Vcc GND VB+ VB- VZ+ VZ- Green Yellow Brown White Blue Red Black Pink Type Code GE- -A- - 1 2 3 4 5 1 Series 2 Gear Module 3 Output Signal Type 4 Number of Teeth 5 Index Shape Geartooth Encoder 03=0.3mm A=Sin/Cosine signals 128 F=Concave tooth 04=0.4mm 256 M=Convex tooth 05=0.5mm 512 other 5 5