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PBEI | March 2017 11 Prepare the motor for operation. Before you start the motor for the first time, check that all wiring from the sifter to the motor and motor starter conforms to the wiring dia- gram. Also check that the voltage, phase, and frequency on the motor's nameplate match your line circuit's voltage, phase, and frequency. If you can, remove all external load on the motor and turn the motor's rotor by hand to make sure that it rotates freely. Before running the sifter with material, start the motor without a load and run it long enough to en- sure that the sifter doesn't develop an unusual condition (such as a strange noise or wobbly or jerky gyration) that could mean the drive mechanism is out of balance. Once the gyratory sifter is operating in your process, make sure that it's working correctly by performing two simple checks each day: First, visually inspect the sifter, both when it's idle and when it's operating, for leaks, loose hold-down rods, loose screen decks, jerky gyration, and other problems. Second, when the sifter is operating, check its gyratory motion by hold- ing a felt-tip pen so that it lightly touches the sifter's top cover. The sifter's motion should cause the pen to draw a perfect circle on the cover. If the sifter loses contact with the pen or pushes it up, the sifter isn't shimmed properly or a bushing in the drive mechanism has failed. Screen deck maintenance The following information describes maintenance you should provide at monthly and yearly intervals to keep your screen decks clean and in good working condition. One note: To minimize your sifter's downtime for repairs and the lost production that goes along with it, stock spare parts for the screen decks, including one set of screen inserts, one set of screen cleaners (if your sifter uses them), and one set of screen deck gaskets and sealing adhesive. (Consult the sifter manu- facturer for advice about other spare parts to keep on hand for your sifter, such as hold-down rods and fasteners and drive mechanism components.) Monthly maintenance. Once a month, clean the screen decks and inspect them for wear, following these steps: Disassemble the screen deck stack. After you ensure that the material feed to the sifter has been stopped and that all material has been discharged from the sifter, stop the sifter. Remove the flexible tubes at the sifter inlet and outlet, then remove the hold-down rods (or similar devices) holding the screen decks on the sifter, and lift the top cover off. (Some gyratory sifters have a large side access door in the housing that allows individual screen decks to be removed without a need to disassemble the screen deck stack.) Starting at the top, remove each screen deck one at a time, carefully avoiding any damage to the screen deck frame or the screen insert. You should be able to easily remove each deck without using tools; if you must use tools, make sure that they can't damage or distort the screen deck. Caution: Never operate the sifter with the screen decks removed. FOR EMERGENCY SHUTDOWN OF CONVEYORS Provides 200' of coverage Cannot be accidentally reset Explosion-proof models available Broken cable detection models available UL & CSA Certified ISO 9001 Registered 130 Seltzer Road • PO Box 167 • Croswell, MI 48422 Phone: 800-233-3233 • Fax: 810-679-4510 FOR MORE INFORMATION Visit www.conveyorcomponents.com or email us at info@conveyorcomponents.com MODELRS CABLE OPERATED SAFETY STOP CONTROL FOR CONVEYORS