Motors without mechanical transmissions

May 10, 2007
Conventional servosystems typically have 15 mechanical transmission components per axis of motion, and this limits performance and reliability while increasing costs.

 

An alternative, frameless direct-drive motors, can take months to design and then months more to install and get working properly. But perhaps the best alternative is a Cartridge DDR motor from Danaher Motion, Wood Dale, Ill. (danahermotion.com).

According to the company, they cut operating costs by more than $10K/axis, compared to conventional servos. They are available in frame sizes from 4.25 to 13.78 in. with four stack lengths per frame. The bearing-less devices need less maintenance and feature factory-aligned high-resolution feedback devices such as encoders. The motors are CE marked and UL listed for global applications, and are available with 240, 400, and 480-V ratings. Continuous torque ranges from 4.57 to 510 N-m, with peak torque to 1,017 N-m and speeds to 2,500 rpm.

Sponsored Recommendations

June 27, 2025
Ensure workplace safety and compliance with our comprehensive Lockout/Tagout (LOTO) Safety Training course. Learn critical procedures to prevent serious injuries.
June 27, 2025
Join our expert webinar to discover essential safety control measures and best practices for engineering a truly safe and compliant industrial environment.
June 25, 2025
An innovative aircraft with electric drives combines the best of both worlds. The cross between drone and helicopter could mean significantly faster and more efficient air emergency...
June 25, 2025
Effective when other materials fail, ceramics are particularly suitable for applications requiring wear and chemical resistance, sliding characteristics or biocompatibility. Discover...

Voice your opinion!

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