Magnetic switch is one kind uses magnetic field signal to come parts of an apparatus of pilot circuitry switch, also call magnetism to accuse switch. Magnetic switch meaning comes through magnet namely of the induction, this " magnetism " it is magnet, magnet also has several kinds, commonly used magnet has boron of iron of neodymium of body of balata magnetism, permanent magnet oxygen, agglomeration to wait above the market. Switch is canal striking spring. Canal striking spring is the abbreviation that dry type reed is in charge of, it is element of a kind of passive electron switch that has contact, have a structure simple, volume is minor the advantage such as facilitating control, its crust is a sealed vitreous canal commonly, the stretch reed report that pledges of two iron in the canal board, return fill to have inert gase. At ordinary times, two in vitreous canal reed that make by special material are apart. When magnetic material stands by glass to be in charge of, below the action of magnetic field lines of force, two reed inside the canal are magnetized and attract a contact each other, reed can be sucked close together, the circuit that makes node place is received connects. After magnetic force disappears outside, two reed are apart as a result of the flexibility of itself, circuit also disconnected.
The action of magnetic switch is an induction only to piston lever give out a signal to give PLC, spacing does not use magnetic switch, just use as the sensor that the air cylinder condition such as PLC offers in automata, it can feedback only whether does air cylinder reach the designated position, cannot use at fixed position quite.
Magnetic switch can give out to reach the designated position only signal, the limitation of the journey needs mechanical spacing. If your cylinder load gets outside force greatly inertial perhaps very big, gas is compressed8. Piston lever can move, so if want accurate seat, still need mechanical spacing. Control what be no good for certain accurately so, did not ask greatly more commonly, also can use magnetic switch spacing, but can be rough location only, the circumstance with not high demand, can save a journey switch!
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