Specifications

Lead swing : One of the most important operations in winding an armature is to lace the coil

leads in the proper commutator bars. Leads may be placed in the bars in any of the three

different positions, depending on the original location.

Fig. 6.5 Fig. 6.6

The following method is used in

determining the position of the leads in the

commutator.

Stretch a piece of cord or string through

the centre of a slot, as shown in Fig. 6.7, a,

b,& c. Note whether it is in alignment with

the commutator bar or with the mica between

the bars.

If the data call for a lead swing of the

three bars to the right, lace the lead of the

first coil three bars to the right, counting the

bar that lines u with the slot as no 1. All the

other leads follow in succession.

If the centre of the slot is in line with the

mica, consider the bar to the right of the mica

as bar No.1. Connection of winding ends with

the commutator segments.

After winding the armature, the end

leads of the armature conductors are laced

in the slits of the commutator raisers. (Raiser

slits should be properly cleaned and well

reared to receive the conductors.)

For secure and good electrical contact,

these conductors are well cleaned to remove

insulation and dirt. Then the conductor ends

are laced in the respective raiser slits and

soldered brazed or hot-stacked.

Fig. 6.7a

Fig. 6.7b

Fig. 6.7c