Babbage's Difference engine. Can calculate polynomials.

Animation: http://www.youtube.com/watch?v=8X6iIpjawZU

This is a revision of thing 7609, but is not compatible.

This in incomplete.

Parts Remaining

• Carry Mechanism
• Timing/Lift Mechanism
• Detents for wheels (prevents unwanted rotation)
• Thrust bearings

Not all parts exist yet
Parts that do not exist are in italics
Parts that exist are in Bold

A machine with n columns can calculate polynomials of up to the (n-1)th degree. (3 columns to solve quadratic, 4 for cubic, etc.)

Customizer Changes

• Change the Tab Offset until Bottom Plates A and B fit tightly together.
• Change the Sliding Tab Offsets until the tabs on Sector Wheel Bearing Plate loosely slide in the slots in Bottom Plate A.

Parts

Print/find two Lego Technic axles for for each column.
Print one of each part for each column.
Except
Print two of Thrust Bearings for each column.
Print one of ODD or EVEN parts for every odd or even column.

Assembly

1. Press together all Bottom Plates, alternating A and B
2. Press all Lift Plates 15mm onto Technic axles
3. Insert Technic axles with Lift Plates into holes in Bottom Plate A. Lift Plates should be touching Bottom Plate A
4. Insert remaining Technic Axles into Bottom Plate B
5. Slide one Thrust Bearing onto each Plate A axle
6. Slide Bearing Plates onto Plate A axles. The tabs on the Bearing Plates should go into the slots in Bottom Plate A
7. Slide one Thrust Bearing onto each Plate A axle
8. Press all Sector Wheel Tabs into Sector Wheels
9. Slide Sector Wheels onto Plate A axles
10. Slide Figure Wheels onto Plate B axles
11. Press Sector Wheel Restore Arms onto Plate A axles
12. Press Figure Wheel Restore Arms onto Plate B axles