Incremental Encoders
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Incremental Encoders

Incremental shaft encoders also known as Incremental Rotary Shaft Encoders are ideal for monitoring sensing a rotating shaft, or even linear position sensing when used in conjunction with ball screws etc, rollers. When integrated into a control system, they provide speed, position, acceleration & direction feedback data to the system. Incremental encoders produce a series of pulses directly proportional to movement of its shaft. Incremental encoder pulses usually consist of two square-wave signals known as A channel & B channel (also known as 1 channel & 2 channel).

The two digital square-wave signals are identical, but are phase shifted by 90 electrical degrees from each other. One of the square-wave pulses (A or B) could be simply counted measured to provide position and or speed, acceleration etc. However, by using the B signal together with the A signal, with the correct decoding it is possible to determine direction of rotation of the shaft so that pulses can be added in one direct, whilst deducted in the opposite direction. In addition it is possible to use the A & B signals to multiply the resolution by 2x or 4x, again depending on the type of decoding required.

An incremental encoder is also provided with a digital Marker Pulse (also known as a Reference pulse, Z channel, or 0 channel). This is a single pulse per revolution of the shaft. The pulse can be used by the control system counter as a reset, reference, checking pulses, revolution counter as well as many other functions. The Marker channel can usually be supplied in various forms such as, un-gated (of no fixed width), gated with A (only high when A is high), gated with B (only high when B is high), or gated with A & B (only high when A & B are high).
Solid Shaft

40SA frame size
40mm
IP54 to IP64 up to 30,000ppr (available in Aluminium) 40SA datasheet further information
58AA frame size
58mm
IP65 up to 30,000ppr (Aluminium) 58AA datasheet further information
58BA frame size
58mm
IP65 up to 30,000ppr (Aluminium) 58BA datasheet further information
58CA frame size
58mm
IP66/IP67 up to 30,000ppr (Aluminium) 58CA datasheet further information
58DA frame size
58mm
IP66/IP67 up to 30,000ppr (Aluminium) 58DA datasheet further information
58DS frame size
58mm
IP66/IP67 up to 30,000ppr (Stainless Steel) 58DS datasheet further information
70AA frame size
70mm
IP65 up to 30,000ppr (Aluminium) 70AA datasheet further information
70BA frame size
70mm
IP65 up to 30,000ppr (Aluminium) 70BA datasheet further information
70DA frame size
70mm
IP66/IP67 up to 30,000ppr (Aluminium) 70DA datasheet further information
70DS frame size
70mm
IP66/IP67 up to 30,000ppr (Stainless Steel) 70DS datasheet further information
63UA frame size
63.5mm
IP65 up to 30,000ppr (Aluminium) 63UA datasheet further information
90BA frame size
90mm
IP65 up to 30,000ppr (Aluminium) 90BA datasheet further information
90DA frame size
90mm
IP66/IP67 up to 30,000ppr (Stainless Steel) 90DA datasheet further information
90DS frame size
90mm
IP66/IP67 up to 30,000ppr (Stainless Steel) 90DS datasheet further information
Semi Hollow Shaft

40SA IP65 up to 30,000ppr (Aluminium) 40SA datasheet further information
58SA frame size
58mm
IP54, IP65, IP66/IP67 up to 30,000ppr (Aluminium) 58SA datasheet further information
Hollow Shaft

51HA frame size
51mm
IP65 up to 30,000ppr (Aluminium) 51HA datasheet further information
75HA frame size
75mm
IP65 or IP66/IP67 up to 5000ppr (Aluminium) 75HA datasheet further information
75HS frame size
75mm
IP65 or IP66/IP67 up to 5000ppr (Stainless Steel Frame) 75HS datasheet further information
90HA frame size
90mm
IP65 or IP66/IP67 up to 5000ppr (Aluminium) 90HA datasheet further information
75HS frame size
75mm
IP65 or IP66/IP67 up to 5000ppr (Aluminium) 75HS datasheet further information
102HS frame size
102mm
IP66/IP67 102HS datasheet further information
110HA Large Bore Hollow Shaft Encoder 110HA datasheet further information
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