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15 Ton x 4' Used Niagara Mechanical Press Brake, Mdl. IB-15- In some applications such as clean rooms or food handling, this dust could be a contamination problem, so in these applications, the brake should be enclosed to prevent the particles from contaminating other surfaces around it. In many cases this can be significant it can be less than half of the static torque rating. Spring Type - When no current/voltage is applied to the brake, a spring(s) push against a pressure plate, squeezing the friction disk between the inner pressure plate and the outer cover plate. Electric motors are used in a wide variety of applications, with most of them requiring a brake. We're going to adjust our break gap. In the maximum torque condition, discs are rotated until the fields are directly opposing each other, so the magnetic fields bump against each other and have to travel circumferentially through the disc putting the maximum amount of magnetic drag on the disc. These lines of flux are transferred through the small air gap between the field and the armature and friction disks. Furthermore, the braking torque can also be varied by using different spring packages. Note: This method will give an approximate air gap of 0.018". We can offer high energy brakes for applications where the brake is required to stop very large loads repetitively. Almost all manufactures put the static rated torque for their brakes in their catalog. Where Rf = final resistance, Ri = initial resistance, 234.5 = copper wires temperature coefficient of resistance, Tf = final temperature, and Ti = initial temperature. DO NOT adjust if the motor shaft can be turned by hand, when released. Copper (sometimes aluminum) magnet wire used to create the coil which is held in the shell either by a bobbin or by an epoxy / adhesive. Based on V = I R, as resistance increases, available current falls. Operating vibrations from uneven loads, poor alignment, or misassembly will obviously destroy a unit if left unchecked . In high cycle applications where registration is important even the difference of 10 to 15 milliseconds can make a difference in registration of the driven material. Second factor in figuring out response time of a brake is actually much more important than the magnet wire or the air gap. Permanent Magnet Motors. Once it is known how much inertia is required for the brake to start or stop then the appropriate size of brake can be chosen. And as the name implies, you should always use it in emergencies. . Regardless of the transmission youre driving (automatic or manual), whether you want to park on a slope or level parking lot, or whether the weather is inclement or unpleasant, you should always park with the emergency brake. In reality this is what the end customer is most concerned with.