This case study outlines the upgrade of an existing 30-ton capacity Class E magnet service crane.
Originally sold as a cab controlled static stepless crane with wound rotor motors, the crane had performed well over its first 35 years of service. However, Static Stepless control and wound rotor motors have dramatic negatives in this era of crane design and maintenance. Controls that not only provide a high degree of operational readiness, but give maintenance personnel an advantage with trouble shooting and preventative repairs are a huge asset for cranes used in plant production.
The scope of the project included a structural survey, as well as a mechanical inspection of drums, gearing, couplings, and all wearing items to ensure the crane could function better than new after the modernization was completed.
The goals for this project included:
Zero injuries or accidents during the work period
Replace all controls for the crane
Replace wound rotor motors with invertor duty squirrel cage motors
Replace all brakes with Thruster brakes
Replace the entire festoon
Replace the cab controllers and provide a better ergonomic environment in the cab
Leave the crane with more operational time, with lower cost of ownership controls and devices
The pictures below are to show the condition of the crane prior to the upgrade.
The results are fantastic, and the crane now provides new crane reliability and the operators love the operation of the crane with an upgraded cab.
Long term, Magnetek variable frequency controls will reduce the number and type of mechanical breakdowns as the motors cannot generate un-needed (additional) torque to crane motions. This will extend wheels, couplings, shafting, and increase gear durability.
6 months after the installation the customer wrote us to express how happy they are with the results. If you have an old crane and want to investigate a modernization instead of a replacement, please call Engineered Lifting Systems or contact us today!