Someone once said about playing the guitar, “It’s easy to play, but it certainly isn’t easy to play well.” The same thing can be said about interpolated encoders: with modern electronics, it’s not that hard to do, but it certainly is hard to do well. Encoder digital signals start as sine waves and can be interpolated to produce higher resolutions. Sine waves must be clean and free of noise for effective interpolation. Be sure to use encoders that offer advanced optic and electronics systems to provide superior sine waves and interpolation. The key to the successful operation of an optical encoder is the optics system, which consists of a light source, a resolution disk, and a sensor. During the operation of the encoder, the resolution disk rotates between the light source and the sensor. Resolution lines on the disk break the beam of light between the light source and the sensor as each line passes by. The output from the sensor is an analogue signal called a sine wave, a series of rising and falling voltages that varies with the amount of light reaching the sensor. Each sine wave period has a duration of 360 electrical degrees.
BEPC’s various high-resolution encoders are just that – high resolution – and their innovative approach ensures that the gains made in resolution are not lost in increased inaccuracies and poorer performance specifications. BEPC’s advanced optics system incorporates a proprietary sensor design to ensure the cleanest possible sine wave. Using these high-quality sine wave signals, BEPC’s high-resolution encoders generate highly accurate and reliable interpolated outputs while virtually eliminating the phase, offset, and amplitude errors common in many other encoder designs.
If you have questions about optics, resolution, or anything else encoder-related, give us a call. We are here to help.
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