The MintakaFulcrum

Mk 1.0

Materials List

• Materials for Stator
• 1. 2 - 3/8" x 3" mild steel bolts and 8 nuts.
  2. 4 - 3/8" x 1-1/8" outside diameter (min.) nylon washers for bolts.
  3. 1 roll of ½" masking tape.
  4. 1 roll of 1" masking tape.
  5. 2 rolls of black electrical tape or teflon tape.
  6. 100' - 200' of 22 gauge copper magnet wire. Use more wire for a higher resistance coil.
  7. 200' - 800' of 26 gauge copper magnet wire. Whatever length is used for the primary, then use 2 or 4 times the length for the secondary.
     
     
• Note: This is just enough material to build 2(two) stators.

• Materials for Rotor
• 1. 16, 24, or 32, 1" diameter x 0.25" thick ceramic disk magnets
  2. 2" thick material to cut into disk. I used Nylon disk. Diameter can vary. Suggest 6-8 inches for this scale of design.
  3. 2 - 8mm inside diameter bearings for shaft. Inside diameter will vary according to the design of your shaft.
  4. Something to make a spindle from. I had a machine shop make this for me out of two pieces of brass. One thought that I had, is to use the turntable out of an old record player.... 12 inch though!
  5. I used 4 long screws with nuts to hold the nylon disk between the rotor spindle halves.
     
     

• Materials for Switching and Coil Circuit
• 1. 1 reed switch, or hall ic magnetic field sensor.
  2. 1 NTE 36 Transistor and heat sink.... although you hopefully won't need the heat sink... that IS the name of the game!
  3. 1 330 ohm resistor 1/4 watt
  4. 1 5k6 ohm resistor 1/4 watt
  5. 2 -12 volt car batteries or other power supply and one battery for charge testing.
  6. 1 full wave bridge rectifier for the secondary coils... You may want to get two. One for each coil.
     
     

• Materials for Rotor Base and Coil Support.
• 1. 1 - 1' x 1' straight piece of hard wood or fairly thick plastic.
  2. Two 6" lengths of 2x4 or other suitable material.
  3. 3 - 4" L-brackets 4x4 square
  4. 1 - 16" long by at least 2" wide and deep enough to accommodate the bearing. There is enough left over to be used as a small support for the bottom bearing.
  5. Assorted sizes of mounting screws and washers used for spacers.
     
     

• Tools List
• 1. Drill and drill bits
  2. Electrical tape.
  3. Masking tape.
  4. Filiment tape.
  5. Soldering gun and solder.
  6. Knife and scissors
  7. Hot glue gun and glue sticks.
  8. Assorted screwdrivers
  9. Assorted wrenches
  10. At least 1 Digital Multi Meter. Good to have analog one too and scope.
  11. rpm gauge (recommended)
  12. Patience! You want to be as precise as possible.
      
      

CAUTION: The information here is for educational purposes only. Any attempt at replication is done at full liability for the person replicating it. These motors can develop high rpm and high voltage depending on how they are designed. Build and operate at you own risk!

email me: motorlab@shaw.ca

For the copy-right/claim© 2001-3 by: Ian Coke-Richards and The MintakaFulcrum and may be freely distributed with due respect. Not for commercial purposes without permission and licence from the author. All commercial uses are subject to the terms of the user licence.