Pico Systems

Quadrature Encoder board

This board is a 4-channel 24-bit Quadrature Encoder Counter. It counts all transitions of quadrature encoders with a 24-bit signed binary counter. Control is through a bi-directional parallel port, with signals connected via the PPMC motherboard. The board has a 4-position DIP switch to set the range of addresses the board responds to. It occupies a block of 16 Byte addresses. This allows more than one encoder board to be used in a system, to obtain more than 4 axes of closed-loop motion control.

The board can accept differential encoder signals when an extra-cost option is installed. When this option is installed, jumpers can select from differential or single ended receivers on an encoder-by-encoder basis. (In fact, even the individual signals for one encoder can be selected this way, although such a use would be rare.)

Additional logic is provided to read an index or zero reference channel along with the encoder quadrature signals. This signal sets a register bit when a low-to-high transition is detected.

There is a 24-bit preset register that can be used to preset one (or all) counters to a specific value.

Register definition for the Encoder Counter

Connector Pinouts for the Encoder Counter

Price List

For more information, contact :
Jon Elson
Pico Systems
543 Lindeman Rd.
Kirkwood,  MO  63122
(314) 965-5523
or, email at : elson@pico-systems.com


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