As the worlds first excavator to incorporate master/slave force feedback control
technology, the Kraft HAZ-TRAK system combines the power and mobility of a
conventional excavator, with the dexterity and controllability of a Kraft 7-function force
feedback manipulator arm.
Using a single hand controller, master/slave control allows the HAZ-TRAK operator to
intuitively control up to seven hydraulic functions, with one hand, as if the machine were
an extension of the operator's own arm. Force feedback allows the operator to feel what's
happening, and control the forces of the machine with great ease. In hazardous
environments HAZ-TRAK may be operated by remote control from hundreds of meters
away, while providing the operator with a level of confidence and controllability never
Built as a technology demonstrator the Kraft HAZ-TRAK force feedback excavator was
selected by Popular Science magazine as one of the year's 100 greatest achievements
in science and technology.
HAZ-TRAK pioneered the use of advanced master/slave force feedback control systems
technology for the control of large hydraulically powered equipment, and paved the way
for future applications of the technology.
HAZ-TRAK in the conventional excavator configuration with bucket.
Special tools and attachments on the end of the HAZ-TRAK excavator arm demonstrated
the ability of the machine to perform a variety of complex tasks. Shown is HAZ-TRAK as a material handling robot with a dexterous pitch, yaw, roll wrist and barrel handler end effector.