Tweedy™ Mixer Control System Upgrade Home › Customer Services › Upgrades › Tweedy™ Mixer Control System Upgrade Hundreds of Tweedy mixers supplied in the last 30 years are in daily use. While mechanically sound, their obsolete control systems provide limited functionality, are difficult to fault-find and expensive to maintain. In many cases spare parts are no longer available. Industry standard components Any Tweedy mixer can be upgraded by retrofitting the latest control system that is based on industry standard off-the-shelf components. Upgrade benefits A new control system provides a more user-friendly operator interface; it gives better consistency and security of the mixing process, with less maintenance. Tweedy™ Mixer Control System Upgrade Further Reading Technical Bulletin: Tweedy™ Mixer Control System Upgrade