X-Y Positioning

In X-Y positioning applications, such as automated pick-and-place, rotary encoders provide feedback on two axis of motion in order to determine X-Y coordinates.

The encoder can be attached to the shaft of a ball screw or the drive motor of an actuator. In some cases a pinion gear and rack system or measuring wheel can be used to provide position information.

Mechanically, shaft, thru-bore and even measuring wheel encoders can be applied, depending what design is most readily integrated into the system.

Electrically, variables such as resolution, output type, channels, voltage, etc, all should be specified to meet the individual application requirements. Due to the reciprocating motion, quadrature output is a must since direction must be determined. Additionally an index pulse should be specified to ensure the ability to find a home position.

Both incremental and absolute encoders are suitable for X-Y positioning.

Environmentally, proximity of the encoder to potential exposure to liquids, fine particulates and extreme temperatures will dictate specification. In applications with wash down requirements, an IP66 or IP67 seal can offer protection against moisture ingress. However, consider a stainless steel or polymer composite housing or shielding the encoder to mitigate the effects of harsh cleaning chemicals and solvents.

Examples:

Pick and place packaging robots
SMT (surface mount technology) machines
Automated microbiology testing machines

Encoders for X-Y Positioning

Model A58SBS

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Model A36SB

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Model 25SP

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Model A36HB

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Model A58SB

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Model 858

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Model 121

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Model 958

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Model A25SB

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Model 15S

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Model 755HS

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Model A36R

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Model 802S

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Model 260

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Model 58TP

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Model 925

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Model 960

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Model 15T & 15H

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Model A58HE

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Model A58HB

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