Most pneumatic positioning systems control position by controlling directional flow. However, the Rexroth Electro-Pneumatic Positioning System (EPPS) utilizes our expertise in direct-acting proportional pressure regulators to control position, and can be applied equally well to both piston rod and rodless pneumatic cylinders, in a considerable range of bore sizes and stroke lengths. The EPPS uses standard, off-the-shelf components to reduce cost and improve availability. The positioning feedback is provided by a non-contact Hall-effect sensor mounted externally to the cylinder, thus avoiding the need for an expensive gun-drilled piston rod and internal transducer. Simple analog control (0-10VDC and 4-20mA standard), is applied to a closed loop controller, no G-code programming required. The cylinder position tracks the analog input.
Email us at LHTV@livhaven.com for more information on products and technology available from Aventics (formerly Rexroth Pneumatics).