Page 188 - Demo

V012024 • © 2024 Portescap. Specifications subject to change without notice.GearheadsGearheads are used between the motor and the load to reduce the speed and/or increase the torque delivered to the load with the best possible efficiency. We offer both planetary and spur gearheads, with each design offering advantages suited to particular applications.EncodersEncoders provide feedback for accurate control of speed and positioning. We offer three types – optical, magnetic and magnetoresistive – all featuring a robust design suitable for severe environments. Resolutions from 1 to 1024 lines per revolution are available, with up to 3 channels.Output shaftPlanet plateRing gearFaceplateMotorEnd capMagnetEncoder chipEncoder capGearheads & EncodersOptical, Magnetic and Magnetoresistive EncodersType Details / Features Advantages for ApplicationOptical• Transmissive optical system• 3 Channel (A, B, Z)• Optional line driver• High accuracy• High line count• Ultra low jitter• Very precise positioning• No sensitivity to external magnetic fieldMagnetic: M-Sense• Hall sensor array interpolated• 3 Channel (A, B, Z)• Integrated RS422 line driver• Integrated design• High line count• High resolution in a compact design and low diameter• Long commutation lines can be handled between encoder and driver• Axial and radial cable outputMagnetic: MR2• Magnetoresistive sensor interpolated• 3 Channel (A, B, Z)• Integrated design• Compact design• High line count• Insensitive to temperature• Very low sensitivity to unwanted external field• High resolution in a shorter lengthMagnetic: Type D/F• Digital Hall sensor (not interpolated)• 2 Channel (A, B)• Insensititve to hostile environment• Compact design• Negligible unit length increase for Type F• Very low current consumption• Very low power consumption• Gamma ray-proof version available on requestSpur and Planetary GearheadsType Details Application AdvantagesSpur gear concept: Only one transmission point per train• Low friction per train• Multiple trains can be configured to suit design intent• Input and output shaft not necessarily in line• Dual output shafts possible• Direction of rotation can be reversed by using an odd number of reduction stages• Good efficiency, about 0.9 per train• Long gearbox of smaller diameter or short gearbox of large diameter• Free choice for placing the motor relative to the output shaft• Accommodates mounting of a sensor, potentiometer, etc.• Low noisePlanetary concept: 3 or 4 transmission points per train• Higher reduction ratio per train, with a tradeoff of higher friction• Can transmit higher torques• Input and output of a train have the same direction of rotation• Less backlash• Higher lifetime due to planetary arrangement• Efficiency about 0.85 per train• Exceptional performance in a very compact gearbox• For any number of trains, the load always rotates in the same direction as the motor• Less shock in case of a rapid reversal of motor rotation188