Linear Actuator ramps down, then ramps up.
Press Release Summary:
H Kit variable pitch linear actuator is suited for applications requiring deceleration, reversal, and gradual acceleration. Control of linear speed is mechanical, requiring no electronics or programming. Unit has auto-reverse, zero backlash, variable pitch, up to 800 lb of axial thrust, and accuracy to within +/- 0.005 in. Travel speed may be up to 13 ft/sec over maximum distance of 16 ft. Kit is available separately or as part of production assembly.Original Press Release:
Mechanical Linear Speed Contol On Rolling Ring Actuator Yields Smooth Reversal Without Complex Design
Aston, PA, February 2002 - Amacoil/Uhing has introduced the H Kit, a modified model of its variable pitch RG "rolling ring" linear actuator, for applications requiring deceleration prior to reversal, followed by gradual acceleration after reversal. "Ramp down/up" control of linear speed is purely mechanical requiring no electronics or programming. Design engineers wishing to eliminate sudden stops and starts that could jar the payload or shock the system, will find the H Kit a useful option which does not complicate design.
An optional modification to the Amacoil/Uhing RG rolling ring actuator, the H Kit is available separately or as part of a production assembly, ready for installation into the production line, and connection to the drive motor. RG rolling ring linear actuators are used for a wide range of linear motion applications including winding, spooling, slitting, spraying, cutting and grinding.
Features include auto-reverse, zero backlash, variable pitch, up to 800 lbs. of axial thrust, and accuracy to within +/- 0.005 inches. Travel speed may be up to 13 ft./sec. over a maximum distance of 16 feet. The only maintenance required for Amacoil/Uhing rolling ring linear actuators is periodic, light lubrication of the shaft.
Attached to the actuator's automatic reversal mechanism, the "H lever" is connected through the housing to the rolling ring bearing assembly. As the actuator contacts an end stop, the leading end of the H lever is turned which slightly pivots the bearing assembly thereby reducing the actuator's linear speed. Traveling at the reduced speed, the actuator then continues until the automatic reversal mechanism is tripped. The trailing end of the H-lever then catches a second stop which prevents the rolling ring assembly from assuming its full pitch position. This causes the actuator to travel back in the opposite direction - but at a reduced speed - until the trailing end of the H lever gradually clears the stop to permit the rolling ring bearing assembly to assume its full pitch position, ramping the actuator up to full linear speed.
Amacoil specializes in the design and production of rolling ring linear motion systems for reciprocating, positioning and indexing applications. In many cases, Amacoil/Uhing rolling ring linear actuators can eliminate complex controls from linear motion design
