Photoelectric Miniature Single Turn Absolute Encoder , SJ38 10 Bit IP50 Absolute Shaft Encoder

Miniature photoelectric absolute encoder SJ38 series 1024 steps per turn 10 bit IP50

Factory Encoder Production Capability

5000 pieces per month

-------- Production Line Capacity

50000 pieces per year

--------Actual Units Produced (Previous Year)

SJ38 absolute encoder Product Basis information

About Absolute encoder

Absolute encoders have an encoder disc (sporting marks or slots) on a power-transmission shaft and a stationary pickup, but the disc marks output a unique code for each shaft position. Absolute encoders are either single-turn or multi turn encoders. Single turn absolute encoders can verify position within a single turn of the encoder shaft. This makes them useful for short travel situations. In contrast, multiple-turn absolute encoders are better for more complex or longer positioning situations.

Engineers generally classify absolute encoders by the number of their output bits, which correlates to the number of the disc’s tracks—and the maximum rotary angle the encoder registers. More after the jump.

Absolute rotary encoders have the advantage of non-volatile memory. That is, they do not lose track of positioning even when power fails. So even if something moves the machine shaft when power is off, an absolute encoder keeps track of the rotary-position change when the machine powers on again. Usually, electronics store this information as binary code, ideally Gray binary code. Absolute rotary encoders can operate point-to-point as well. They are useful in situations where safety is a concern, because they position whenever machines power on. Immunity to electoral noise is another benefit. One caveat: absolute rotary encoders are generally more expensive than incremental encoders. However, the cost of absolute encoders has steadily decreased over the last decade, and that’s driven steady increase of their use.

Applications

• Petrochemical industry
• Pharmaceutical industry
• Food industry
• Aviation and aerospace industry
• Architectural decoration industry
• Oil and gas industry
• FFS machine
• VFFS machine
• Packing machinery
• Capsule filling machine
• Pharmaceutical machine
• VVVF motor
• DC motor
• Stepper motor

• Servo motion controller
• Gearbox
• DC garage door motor
• DC servo motor
• Stock driver
• PMDC geared motor