I am looking for someone who knows how to measure gears.

I need this rack to be pulled down by these series of gears.

Each system is the same in the picture I am providing but I need the gears of each system to be able to pull down separately the distance of 1 inch, 2 inches and 3 inches.

Also if you can please provide the equations you used and any suggestions to make the system more efficient, thanks.

Here's a link to the picture of the system:

http://i6.photobucket.com/albums/y2...a/GearTrain.jpg

The pole connecting to the Worm Gear will be connected to an arm that will be turning an arm connected to it 3/4 an inch in distance.

Here's a picture of what I mean:

http://i6.photobucket.com/albums/y2...kzelda/Pole.jpg

I also would need calculations for the gear measurements to be able to bring that rack down those distances if the arm were only turned 1/2 an inch.

The circle will be 6 inches in circumference for the arm that turns 3/4 an inch and 4 inches in circumference for the arm turning 1/2 inches.

Also, please let me know if the circle needs to be bigger to compensate for the possible size of the gears.