The master drive point is the single drive point intended to control the overall speed of a web line. The master drive point (also called the pacer or lead section) sets the speed for the entire line through acceleration, steady speeds, and deceleration. If the master drive point slips, the web speed and tension control will be uncontrolled.
Each additional drive point beyond unwinding, master, and winding non-master are considered tensioning drive points or followers and create additional tension zones. Tensioning drive points will run near the master speed, but trim their speed or torque, as needed, to increase or decrease tension.