Cube Encoders: Updating an Industry Favorite

Cube encoders–incremental rotary encoders with a cube-shaped housing–have been popular with machine builders since the 1960’s, largely because these devices are easy to install without special mounts or brackets. Now Posital, a sub-group of Fraba, has updated this old favourite with features and capabilities made to keep this design relevant for years to come.

Posital cube encoders are built around the company’s magnetic measurement platform. The measurement module inside the cube is designed to provide high levels of accuracy and dynamic response in a rugged package that is supposed to be tolerant of shock and vibration loading, dust, and moisture. These measurement modules are also programmable. Resolution (number of pulses per revolution) is designed to be set anywhere from one to 16,384 pulses per revolution (PPR) by simply updating the devices’ software, with no changes to mechanical components. Similarly, pulse direction and the output driver–either Push-Pull (HTL), RS422 (TTL) or Open Collector (NPN)–are defined through software, according to the company. Device programmability is especially significant for distributors, system integrators, or machine builders since it helps them control inventories. With programmable devices, they are made to hold a relatively small stock of ‘standard’ models and set them up for specific applications on an as-needed basis. When restock is necessary, Posital’s international production system claims it would be able to deliver product anywhere in the world in a matter of days at competitive prices, with the minimum order quantity being one.

Posital’s cube encoders are designed to be used as drop-in replacements for traditional cube designs, with identical mechanical dimensions and interfaces. They are meant to retain the easy-to-install characteristics of the original design, while introducing up-to-date levels of performance and durability.