Precision angle measurement for joystick applications

Contelec: In joystick applications, the axis of rotation of the joystick is usually located near the top panel of the housing. Consequently, angle measurement requires rotary encoders with features such as compact size and a measurement system arranged as closely as possible to the periphery. Contelec has now launched a perfect solution to this problem in the form of its lightweight WAL 315 potentiometer. One of the key characteristics of the extremely affordable angle sensor is the peripherally arranged centre of rotation – just 5.5 mm from the edge. Combined with the noticeably compact, slim design, this allows complete joystick systems to be kept small. Despite the compact size, the WAL 315 enables the measurement of electrical angles up to 100° with ±1% linearity.

To meet high safety requirements, a fully redundant version of the WAL 315 is available, with duplicate power supply, ground and signal outputs. The redundant outputs can be used either as two independent output signals or, alternatively, the second signal output can implement application-specific switching functions (for example to define forward or reverse).

The WAL 315 potentiometer is potted in high-grade, temperature-resistant epoxy resin, making it extremely rugged and able to withstand harsh environmental conditions. This is evident in the specified protection rate of IP65 and permissible temperature range of -25 to +85°C. A further impres sive feature of the potentiometer is its amazing durability, specified with a life of 4 million movements, together with the attractive value for money that sets a new standard.