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Low-cost encoders feature high pulse per revolution

Posted: 14 Jul 2010 ?? ?Print Version ?Bookmark and Share

Keywords:incremental encoder? analog output? printer motor?

OPE1275 and OPE2275 miniature encoders

The OPE1275 and OPE2275 single- and dual-channel miniature incremental encoders from TT Electronics Optek Technology are designed specifically for use in printer motors, machine automation and machine safety equipment. The makers highlight the components' relatively low cost vis--vis performance, with the analog output miniature encoders achieving 256 pulses per revolution at speeds of up to 5,000 RPM. "These miniature incremental encoders cost less than half that of comparable incremental encoders available on the market," claimed TT Optek Technology VP of optoelectronic integrated solutions Roland Chapa.

The OPE1275 encoder provides a single-channel analog output for speed of rotation, while the OPE2275 device provides a dual-channel analog output for speed and direction of rotation. Electrical connection is achieved via a 4-pin connector providing V+, ground and output pins.

Frequency response ranges from DC to 25kHz, providing a maximum of 256 cycles per revolution (CPR) and 1024 quadrature states per revolution (PPR). Typical rise and fall times are 500ns and 100ns, respectively. Supply voltage (Vcc) is 5.0, while supply current (ICC) is 21mA. Operating temperature ranges from 0C to +85C.

The makers explain that the OPE1275 and OPE22275 are easy to install, requiring only a Phillips screwdriver for assembly. The extended shaft versions of the encoders are fully assembled and ready for immediate connection.

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