Twentieth century hand-book for steam engineers and electricians, with questions and answers .. . Red mark paintedon center band. FIGURE 53. ELECTRICITY FOR ENGINEERS 93 side of this coil just disappear under the left field.(See Fig. 52.) The position of the red lead and the red mark on theband are the same on all armatunes, but their positionsin the fields of the machines called left-hand (clock-wise rotation), should be as shown in Fig. 53 and 54when setting the commutator. When the armature of a right-hand machine is inposition, the commutator is turned on the shaft until. figure 54. segmen
Twentieth century hand-book for steam engineers and electricians, with questions and answers .. . Red mark paintedon center band. FIGURE 53. ELECTRICITY FOR ENGINEERS 93 side of this coil just disappear under the left field.(See Fig. 52.) The position of the red lead and the red mark on theband are the same on all armatunes, but their positionsin the fields of the machines called left-hand (clock-wise rotation), should be as shown in Fig. 53 and 54when setting the commutator. When the armature of a right-hand machine is inposition, the commutator is turned on the shaft until. figure 54. segment No. 1 is in the same relative position as thelast half of No. 1 coil; segment No. 2 should corres-pond with the last half of No. 2 coil, and segment with the last half of No. 3 coil, as shown on Figs. 51and 52. For left-hand machines, see Figs. 53 and 54. The distance from the tip of the brush, which is ontop, to the left-hand edge of No. 2 segment on a right-hand machine, or to the right-hand edge of No. 3 seg- f)4 ELECTRICITY FOR ENGINEERS ment in a left-hand machine is called the lead, andshould be made to correspond with the followingtable. TABLE OF LEADSDRUM ARMATURES. RING ARMATURES. C12 \ inch positive K12 ^g inch positive E12 /F M12 i negative E2 J « « M2 I H12 4 LD12 \ positive H2 J « « . LD* i MDi2^| MD2 if •< Place the screws in the binding posts at the lowerends of the sliding connections, and put on the dashpot connections between the brushes, with the headsof the connecting screws outward. In every case thebarrel part of the dash pot is c
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