Rolling-ring drive powers in-line spooler

April 15, 2004
Aspooling device from Amacoil Inc., Aston, Pa. places the take-up spool in line with the motor and drive.

Aspooling device from Amacoil Inc., Aston, Pa. (www.amacoil.com), places the take-up spool in line with the motor and drive. This keeps the entire package compact and provides mounting flexibility. A guide attached to the traversing rollingring drive moves back and forth to ensure even placement of material on the spool. The drive travels on a smooth, case-hardened (RC 60) shaft.

The rolling-ring drive from Uhing Co., Germany, uses angled bearings with a ridge machined on the inner race surfaces to convert the rotary motion of a threadless turning shaft inserted through the bearings into precise linear motion. Travel speed is a function of bearing angle and shaft rotation speed, while travel direction relies on bearing angle in relation to the shaft and direction of rotation. In the spooler, the shaft always turns the same way, and a linkage changes the bearing angle to alter travel direction.

The drive lets engineers control direction and travel speed mechanically, eliminating the need for programmable electronics, clutches, cams, gears, and reversible, variable-speed motors. Instead, a mechanical linkage reverses direction when the device hits an endstop, regardless of what direction the shaft is turning. Optional modifications to the linkage, made using simple hardware fixtures, lets users control drive-head movement. For example, acceleration and deceleration, as well as dwell time can be tailored to specific applications. It's also possible to change travel speed on the fly by turning a control that alters the drive's bearing angle. The threadless shaft will not collect oil, grease, and debris and does not need protective bellows or lip seals.

Sponsored Recommendations

Pumps Push the Boundaries of Low Temperature Technology

June 14, 2024
As an integral part of cryotechnology, KNF pumps facilitate scientific advances in cryostats, allowing them to push temperature boundaries and approach absolute zero.

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.

MONITORING RELAYS — TYPES AND APPLICATIONS

May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Solenoid Valve Mechanics: Understanding Force Balance Equations

May 13, 2024
When evaluating a solenoid valve for a particular application, it is important to ensure that the valve can both remain in state and transition between its de-energized and fully...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!