Aston, PA, June 2002 - A linear drive assembly, developed by Amacoil/Uhing, requires no programming, and has mechanically triggered controls which automatically adjust the tool head stroke length and reversal points to meet application requirements. The assembly is designed for use in high volume production and assembly lines where it is necessary to gradually increase or decrease the tool head stroke length, without stopping or slowing down the system. Typically, tools and payloads mount directly to the traversing nut and do not require a separate load carrier. Example applications are loading/unloading machines, parts feeding systems, winding onto spools with outwardly tapered flanges, surface finishing systems, glue/adhesive application equipment, stirring/mixing processes, metrology procedures, and other applications requiring reciprocating linear motion. Amacoil can provide design and assembly, or retrofit an existing Amacoil assembly.

The desired increase or decrease in stroke length is set via a control knob on the front of the assembly. As the system operates, a ratchet lever attached to the framework is actuated when the linear drive passes by causing the "end stops" to automatically move apart or together in increments relative to the dialed-in value. The end stops trigger the spring-actuated reversal mechanism on the rolling ring linear drive so, as the end stops change position, the tool head's stroke length and reversal points change accordingly. Because the changes are made while the system is in operation, independently of the drive motor's speed and rotational direction, the need for clutches, gears and complex control systems is eliminated, permitting the use of an affordable unidirectional, single speed motor to drive the system.

The rolling ring drive in the assembly runs on a smooth shaft - there are no threads where dirt and debris can collect, which means a protective shaft bellows assembly is unnecessary. Additionally, the design of the rolling ring bearing assures continuous point contact between the bearing and the drive shaft, thus eliminating backlash.

Rolling ring drive assemblies provide up to 800 lbs. of axial thrust. Travel speed is up to 13 ft./sec. at constant RPMs, over distances of up 16 feet (max.). Selectable features include automatic reversal, variable pitch, load carriers for heavy or off-center payloads, integrated linear scale to meet high precision requirements, delayed reversal, "dwell" capability, and more. Amacoil specializes in the design and production of rolling ring linear motion systems for reciprocating, positioning and indexing applications.

For more information please contact Amacoil.
Tel: 800-252-2645
email: amacoil@amacoil.com