Electrical news and engineering . Gillies Plant at —The mill is constructed ofsteel and concrete throughout—allmachinery electrically driven—equip-ment includes -18 electric motors. -?—-;i,mi>.iuiil|i|Li>Miiitawfrfc.,,,.,,,iT^»iiiii;.4.^^?^ THE ELECTRICAL NEWS A motor-driven Circular Saw—cutting samples for is determined largely by what the owners feel like spendingon the project, and the type of motor used is settled by themachine requirements. Lumber cutting is intermittent and, of course, the powerrequired varies in proportion to the size of th
Electrical news and engineering . Gillies Plant at —The mill is constructed ofsteel and concrete throughout—allmachinery electrically driven—equip-ment includes -18 electric motors. -?—-;i,mi>.iuiil|i|Li>Miiitawfrfc.,,,.,,,iT^»iiiii;.4.^^?^ THE ELECTRICAL NEWS A motor-driven Circular Saw—cutting samples for is determined largely by what the owners feel like spendingon the project, and the type of motor used is settled by themachine requirements. Lumber cutting is intermittent and, of course, the powerrequired varies in proportion to the size of the cut. Hencethe problem is to find a motor that has a long range of effi-ciency around normal load. The tendency is to overload themotors, with the result that efficiency drops and the runningcost amounts to more than it would have cost to instal alarger motor. Motors Used The squirrel-cage motor is used for driving the greatmajority of machines in the lumber mill, particularly edgers,trimmers, slashers, sizers, matchers, hogs, and in generalmachines that are not subjected to starting under very heavyloads. It is essentially a constant speed machine, and there-fore not suitable for applications where a variable speed isrequired. The wound-rotor motor is particularly suitable for appli-cation where the machines are started under heavy load,such a
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen31donm
