Amacoil (Aston, PA) offers a reciprocating linear motion platform driven by a rolling ring drive that reciprocates automatically without requiring motor reversal. Designed for a PCB measurement/cleaning process, the assembly may also be used for scanning barcodes on parts and other applications requiring repetitive back-and-forth movement. Rolling ring bearings inside the drive assure a backlash-free motion. Smooth reversal is achieved with a modified reversal mechanism that dampens the reversal action, dissipating forward momentum at the reversal points.
Using a control knob on the assembly, adjustments to linear speed are possible on the fly, without changing motor speed or reducing gears. The device contains no hydraulics or pneumatics, and the linear drive requires lubrication once every three months. Speed and travel direction are controlled mechanically, eliminating the need for programming or electronics. Components are precision-machined to limit vertical and horizontal movement of the platform to within ±0.00". Length of travel may be increased or decreased via adjustable end stops.