Part 6 (1/2)

Instead of using only one pole of a stationarythe stationary net This e have the benefit of the attracting and repelling forces from both poles The effect is doubled

We can also ires around this circular iron and net we use no brushes because ant the current to flow in one direction only

The stationary electronet is the _armature_

WHAT TO DO: Make A Motor

_Tools Needed:_

Pocket knife, hammer, vise (or 2 pairs of pliers)

_Materials Needed_:

1 roll of No 24 enameled wire 1 roll of electrician's tape 3 - 4” (20-penny) nails 4 - 2-1/2” (8-penny) nails 4 - 3” brads (10 penny) Wood board for motor base 2 staples or 4 small brads 2 tacks 2 - 3 volt dry cell batteries (or a 6 volt transformer)

Step No 1-Armature

Wrap about 1-1/2” of a 4” nail with two layers of tape This will be the shaft

The iron core will be made of two pairs of 2-1/2” nails Wrap tape around each pair with heads and points alternated

Center both pairs on each side of the shaft Place theether with two layers of tape from tip to tip

Start at the shaft and wind No 24 enameled wire to one end and back

Then do the same on the other end Alind in the same direction

Leave 6” of spare wire at start and finish

Step No 2-Commutator

Scrape all insulation off the ends of the wire Bend the bare ends back and forth as shown Lay them flat over the taped shaft-one on each side of the shaft

Hold the cohtly near the core and at the opposite end

Step No 3-Field

Make the core by bending two 4” nails in the les

space the heads about 3” apart to forether with two layers of tape

Wind about 400 turns of wire around the center Leave 4” of spare wire at start and finish Attach to wood base with staples at each end of the wire Small brads, bent over, will do just as well