Mechanical Rotary Encoders

Mechanical rotary encoders, also called shaft encoders, are electro-mechanical devices that convert the angular motions (movement around fixed points) of rotary shafts into either analogue or digital signals.

What are mechanical rotary encoders used for?

Applications that require precision shaft rotation (movement around a specific point) make use of mechanical rotary encoders.

These include industrial control machinery in factories, rotating radar platforms in satellite structures or computer input devices like trackballs and mice.


Types of mechanical rotary encoders

Absolute encoders:

  • have tracking functions to determine specific shaft positioning points in industrial equipment like CNC machines, lathes and bore machines.
  • maintain positioning data even when power is cut from the system. When the system is switched on again it begins operating from the point where it stopped previously.


Incremental (relative) encoders:

  • record deviations in shaft position points over certain time frames. With each new time frame after power is cut and switched on again the encoder starts recording from a predetermined reference and measures the distance between the previous point and the current point.

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Description Price Pulses Per Revolution Shaft Style Shaft Diameter Encoder Reading Encoder Signal Mounting Type Shaft Length Index Output Maximum Operating Speed Mounting Hole Diameter Current Rating
RS Stock No. 714-2693
Mfr. Part No.AEAT-6012-A06
BrandBroadcom
£21.40
Each
Units
- Plain 6 mm Absolute - - 8.5mm - 12000rpm 0.13mm -
New
RS Stock No. 189-4750
Mfr. Part No.AEAT-6012-A06
BrandBroadcom
£16.258
Each (In a Tube of 280)
Units
1024 (Positions) - 6 mm Absolute - Screw Mount 8.5mm - 12000rpm 17mm 20mA
RS Stock No. 178-2944
Mfr. Part No.AEAT-6010-A06
BrandBroadcom
£15.709
Each (In a Tray of 280)
Units
- Plain 6 mm Absolute - Screw Mount 8.5mm Not Indexed 12000rpm 0.13mm -
RS Stock No. 714-0234
Mfr. Part No.AEAT-6010-A06
BrandBroadcom
£19.19
Each
Units
- Plain 6 mm Absolute - Screw Mount 8.5mm Not Indexed 12000rpm 0.13mm -