Heavy Duty Encoder - Hengstler Encoders

Technology overviewThe cover insures that the encoder is protected from the outsideelements of the application. This could be washdown for thefood industry, stainless for marine applications, or heavy duty forvolatile environments.The Multi turn PCB and gear train keeps an accurate countof the amount times the shaft has made a full rotation. On thePCB, there are three opto asics cascaded and transmittingposition down the line using the BiSS protocol. Each opto asicis reading a transparent gear that is coded with an absoluteposition. The last ASIC transmits a complete 12 bit turn countto the single turn PCB. It is important to note that this is donewithout the use of a battery, so the count will be valid for the lifeof the encoder.The single turn PCB has a single opto asic reading from a diskthat is coded similar to the gears above it. The exception is thatthe disk has more tracks plus an incremental sinusoidal trackthat is used for a secondary output or for interpolating up to22 bits.The spindle primarily contains the bearing, flange, and shaft thatmeet the mechanical demands of the application. The spindleguarantees that the encoder will stand up to the specified shockand vibration, but proper assembly also insures that the encodermeets the specified accuracy.Absolute encoders are typically used in CNC, medical, androbot applications where high resolution is required and absolutefeedback reduces power up sequences.Figure 3: Coded GearFigure 4: Absolute Disk Section2048 cycles/360˚A-A*O° 360°/2048B-B*Figure 5: Incremental Sinusoidal OutputA.05