The proprietary Fmin system ( developed by Mr. Allen Face in 1979) limits the allowable transverse and longitudinal tilt, angular rotations, and angular accelerations (6 variables in total) that occur when moving on an existing fixed track a particular lift truck. For this reason, the permissible values of the variables responsible for the transverse and longitudinal movements and the truck’s dynamic and static effects must be specified and limited.
The allowable values of these variables are “compressed” into a single dimensionless parameter-the Fmin number-wich sets the largest cross aisle(transverse) and down- aisle(longitudinal) ride roughness and mast tilt values to be tolerated. The higher the Fmin number, the higher the accuracy, the lower the tolerance thresholds for shortwave and horizontality.
The required Fmin number for a particular truck geometry(known wheel configuration) in a given aisle to ensure optimum truck speed is determined from the truck geometry, the aisle length, and the maximum lift height: details contain the Fmin specification.
Fmin is thus a full-fledged Vehicle Simulation System that controls the the truck’s statics and dynamics at all locations within the aisle (side-to-side and front-to back tilt, angular velocity, and angular acceleration).
Thus, the Fmin system is the only system that can control the the truck’s static and dynamic motion conditions in wheel tracks with the correct flatness of the floor surface at the lowest cost.