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
| Items | Basic parameters |
| Brand | HENGXIANG |
| Encoder type | absolute encoder |
| External diameter | 38mm |
| Thickness | 28mm |
| Installation dimension | 30mm diameter |
| Shaft length | 13mm |
| Solid Shaft diameter | 6mm D shape |
| Bit(steps) | 5 bit;6 bit;7 bit;8bit;9bit;10 bit;11 bit;12bit |
| Supply voltage | DC5V ； DC8-30V |
| GND | not connect to encoder |
| starting torque | less than 4.4x 10-3N.m |
| Intertia moment | less than 1.5x 10-6kg.m2 |
| Shaft load | Radial 30N; Axial 20N |
| Top REV | 3000RPM ;IP65≤2000 RPM |
| Bearing life | 1.5x109 revs at rated load(100000hrs at 2500RPM) |
| Environmental temperature | Operating:-20 ～+85°C；storage:-25 ～+90°C |
| Environmental humidity | Operating and storage: 35-85%RH(noncondensing) |
| Vibration(endure) | Amplitude 0.75mm,10-55Hz,2 hours for three axis individually |
| Sock(endure) | 49m/s2 ,11 ms three times for X,Y,Z direction individually |
| Shaft Material | Stainless steel |
| Shell Material | die cast aluminum |
| Cable length | 1000mm(cable with shielding) |
| Allowable ripple | ≤3%rms |
| Load Voltage | ≤DC30V |
| Output code | gray code |
| Precision | 360/(resolution x 4) |
| Insulation strength | AC500V 60s |
| Insulation resistance | 10MΩ |
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
