The truck's separately excited control of two D.C. traction motors ensures smooth operation and high-speed transistor switching for efficient control of traction and lift. Contactorless directional control offers constant speed and torque control plus continuously variable travel speeds with fully proportional plugging. Position-hold feature retains truck in place if no travel is commanded. Stall protection feature safeguards motors and major components, if no movement is detected when control handle is engaged. Startup and run diagnostics continuously monitor condition of the control system, and provide feedback on temperature and current on major switching and motor components.
Control system employs regenerative braking for improved energy management.
Interactive operator display and control of all programmable features provide unique operational control opportunities. Motors Dual drive traction motors feature internal fan for bi-directional cooling. Separately excited motor configuration provides optimum efficiency and control flexibility. Lift motor and power steering motors are design for quiet and long-lasting operation. Transmission Dockstocker design features upright motors with easy access to brushes bolted directly to dual independent single piece cast drive units.