I'm using 18mm MDF as that's what I had laying around
1 x dimmer switch
1 x sewing machine motor
1 x old computer cable
2 x connector blocks
and a bunch of screws
Step 1: Rollers
If I had of thought about it a bit more I should have used round nails but hey too late now.
On one roller I need to form a indent for the drive band of the sewing machine motor to sit, this will stop it moving up and down the roller. to do this I used my drill as a make shift lathe, and just pleased a round file on the stick until the groove was at the right depth.
Step 2: Prepare the board
and mark up the board for where the motor will go and the other parts, also marking up the holes.
drill the holes and counter sink them.
Step 3: Attach all the supports and axels
when you attach the second axel support you need to insert the rollers, making sure the drive band is over the drive roller, the one with the grove in it. then attach the second axel.