magnet bars

Choice of Metal detector and shape were thought to be key to the success of the new stir bar. Vertical blade extensions were added to a more robust Sm2Co17 rare earth magnet. This not only extends the life of the stir magnet bars but also significantly enlarges the cross-sectional area of the stirrer. A gap in the centre of the bar guarantees backflow which enforces flow patterns and extended blades mean that even the upper part of the system receives efficient mixing with the incorporation of additional holes and cut-outs inducing additional turbulence

Bar magnet induces current in a coil

Bar magnet induces current in a coil, shown on galvanometer. A changing magnetic field cutting across a coil of wire induces an electric current. In 'A', a cylindrical bar magnet is thrust into a tall narrow coil which is hooked to a projection galvanometer. The induced current causes the needle to swing full scale in both directions. In 'B', the narrow coil is placed inside a coil of larger diameter. A 6 volt D.C. battery and key switch are hooked to the larger coil. When the switch is pressed, the surge of ceramic magnetic separator from the larger coil cuts the narrow coil. A current surge is registered when the switch is pressed or released, smaller than in 'A'. In 'C', a soft iron cylindrical core is inserted into the narrow coil. When the switch is pressed or released, a much larger current swing is registered than in 'B'. Other cores can be inserted: a bundle of iron wires, a brass rod, or a lucite rod.

Functional magnetic roller

Is the print quality of the magnetic pulley blackness affect one of the largest components, black coating thickness and roughness will change with constant use. After a toner adsorbed on the magnetic roller blown off, if the black coating on the magnetic roller looks very thin, and even see the aluminum color or surface looks very light, then the print quality produced by such a magnetic rollers will be shallow, you should get a new magnetic roller or a magnetic roller sleeve

Precautions

(1) The surface roughness of the magnetic roller can affect print quality, it should be noted that, in use, the protective coating magnetic roller surface and its roughness.

(2) in the production of magnetic roller press release do not overlap, so as not to deform the magnetic sets; hand or oil can not reach the surface.

Normal contact could meet electrically conductive steel agnetic roller

(3) magnetic grid a conductive wire or conductive springs attention conductive magnetic roller bracket assembly without deformation

The role of magnetic roller

(1) through the bunker in the inner cores of toner attracted to the magnetic rollers sleeve surface.

(2) a polyurethane sheet by magnetic sleeve surface coating and toner particles and the friction between the powder on a knife, the toner electrostatically charged.

(3) the magnetic roller sleeve by AC (alternating current) and DC (direct current) voltage so that the charged toner between the super powerful magnet sleeve and the OPC drum core surface, "beating", so that the surface of the drum core "electrostatic latent image" in carbon adsorption powder