Digital Line Guide System is used for any winding and unwinding application for guiding the web to reduce the wastages of the material and get high production output with minimum man power. The System has application for slitter re-winder machine to slit any material like laminates, plain or printed polyester or any other material. The System has photo cell that senses colour, line or edge of the material and accordingly it gives reference to the motor for forward or reverse movement. The Digital Line Guide System is capable of providing efficient performance.