FEEDROLLS STOP WITHIN 1/20 OF A SECOND
New Holland’s 30 years of experience with metal detectors has lead to the Metalert® III system. Here’s how it works. A magnet and sensor are housed in the lower front feedroll. The magnet emits a constant magnetic field between the two front stainless steel feedrolls. When a stray piece of iron or steel enters the feedrolls, a signal is sent to a solenoid located above the upper feedroll. The solenoid releases a spring pawl into the ratchet wheel, stopping the feedrolls. At the same time, it shuts off power to an electric clutch on the reversing gearbox, which shifts to neutral and stops power to the feedroll drive. All within 1/20 of a second!