Product category:
Rotary Position, Tilt and Angular Sensors
News Release from: Rotalink | Subject: Encoders
Edited by the Engineeringtalk Editorial
Team on 12 May 2000
Low-cost encoders for drive applications
A range of low-cost add-on encoder/tacho units which allow speed and/or positional feedback to be generated from existing drive units has been developed by Rotalink.
A range of low-cost add-on encoder/tacho units which allow speed and/or positional feedback to be generated from existing drive units has been developed by Rotalink An important feature of the design is that the encoder can be sandwiched between the DC motor and the gearbox, thereby allowing the more commonly available single-shafted low-cost DC motors to be utilised with a feedback device, where previously specialist types had to be used because of the need for a rear shaft
This article was originally published on Engineeringtalk on 30 Aug 2006 at 8.00am (UK)
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Mounting can also be achieved in the traditional way, on the rear of the motor.
The frame size currently available offers an encoder with a 48- or 50-line two-channel quadrature output (thereby giving 192 or 200 pulses per revolution with signal processing).
Long-life optical components are used in the design, which operates from a standard 5V supply.
The detector has internal amplification and a Schmitt trigger output for directly driving TTL or CMOS logic circuitry.
Where a basic non-directional output is required - primarily for speed information - a tacho version is offered as a lower-cost option.
This unit features a 12-line disc running inside a single phototransistor-type slotted switch.
Both units can be used with many types of motor or motor-gearbox combinations.
Each feedback device can be supplied with custom variants of number of pulses per revolution to suit individual requirements where necessary.
This may be particularly useful where a unit is selected for operation with an existing control system.
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