Electric Motor Lab
Additional Information

1. Additional supplies and equipment useful in constructing the electric motor.

Equipment	Notes
Soldering Iron and Solder	Use to reconnect accidentally broken coil wires.
Light oil, or WD-40	Apply a small amount to shaft to help increase speed.
Clear nail polish	Use to re-insulate accidentally over-stripped magent wire, preventing unwanted electrical contact.
Digital Multi meter	Useful for trouble shooting non-functioning motors.
Compass	Use to establish polarity of motor magnets when trouble shooting.
6V lantern battery	Use to start finicky motors to see if they work at all.

2. When working with a large group it is useful to have a supply of extra parts. The motor involves a number of small and breakable components. Some loss is inevitable.
3. Common Problems and troubleshooting. If the motor does not work, here are some common problems to consider.
• Brushes not adjusted properly.
• Armature not spinning freely. Check from rubbing on field magnet.
• Poor electrical connections.
• Insulation not removed completely on commutator. Scrape with knife blade.
• Armature not wound properly. Switch with armature from a functioning motor to check.
4. A small cardboard box is recommended for holding the completed motors. They damage easily when transported. The box protects the motor from damage.