The Rotomation Product Line
The Rotomation product line includes pneumatic and low pressure hydraulic actuators operating at typical pressures of 80 and 250 psi, respectively. All of our actuators, except for the AL75, provide rotary motions generated by a rack and pinion mechanism, in which a piston pushes one of the ends of a gear rack, turning the meshed pinion gear back and forth, depending on which piston is pressurized at the moment. Our rotary actuators have a one-piece pinion shaft so that back and forth torque is directly transferred to the shaft. Our stepping actuators deliver torque in a single direction in steps by connecting the pinion to the shaft with a one-way clutch. With a similar drive mechanism but with precise stopping capability, our indexing actuators produce accurate angular steps using a ratchet and pawl mechanism that provide the solid stop on its shaft. Pick and place actuators combine rotary motions and linear motions by transmitting rotary torque to a rod in its linear cylinder via a shaft-spline connection.
In all the rotary devices below, the torque can be doubled by placing an additional rack with pistons and cylinders on the other side of the pinion and arranging plumbing for pressure and exhaust to diagonally opposite cylinders. These dual rack units are designated with a number 2 following the actuator's size or the series' second digit, i.e. 12,22, 32, or 42 (e.g. A22).
Our miniature or compact actuators are pneumatic but all other actuators can be operated on air or hydraulic oil. In instances where motion control is required, one or more cylinders can be driven by air and the others by oil, through a regulated flow control. Operating conditions and required controls define actuator features to mesh with system control.
The Rotomation product line includes actuators capable of producing eight motions, which allows them to drive process machines directly, without requiring complex mechanical conversion or driving components.
The basic motions are listed below with icons describing and identifying each. Two additional motions can be achieved as described in the "Pick & Place Actuators" section below.