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lego_stewart

Pneumatic Lego Stewart Platform


Design Concept:


Parts List and Sources:
A lot of the parts needed for these tutorials have been discontinued by Lego. As a result, they must be bought from mostly secondhand stores. At the time of writing these tutorials, these were the vendors I found to have the most stock of each piece available.

Lego Store - Pick a Brick
Lego Store - Power Functions Shop
Bricklink - NEXUS GM Brick Store
Ebay - Burnhamh
Ebay - Ile9os

Part Description Part # Vendor Price [per] Qty
Technic Angle Connector (180 Degree) 32034 6
Technic Axle 2 Notched 32062 Pick a Brick $0.10 [1]         | 9 |
| Technic Axle 4                                           | 3705       | | | 9 |
| Technic Axle 5                                           | 32073     | | | 6 |
| Technic Axle 6                                           | 3706       | | | 6 |
| Technic Axle Joiner                                   | 6538a     | | | 4 |
| Technic Axle Pin                                        | 3749       | Pick a Brick                   | $0.10 [1] 6
Technic Brick 1 x 2 With Holes 32000 2
Technic Brick 1 x 4 With Holes 3701 NEXUS GM Brick Store $0.05 [1]         | 4 |
| Technic Brick 1 x 8 With Holes                  | 3702       | | | 2 |
| Technic Brick 1 x 10 With Hole                 | 2730        | | | 2 |
| Technic Brick 1 x 14 With Holes                | 32018     | NEXUS GM Brick Store | $0.67 [1] 2
Technic Brick 1 x 16 With Holes 3703 4
Technic Brick 2 x 4 3001 1
Technic Brick 2 x 6 2456 1
Technic Beam 3 32523 Burnhamh $8.00 [Beam Lot]  | 13 |
| Technic Beam 3 x 0.5                                | 6632       | | | 8 |
| Technic Beam 5                                         | 32316     | Burnhamh                     | $8.00 [Beam Lot] 12
Technic Beam 5 x 0.5 32017 NEXUS GM Brick Store $0.25 [1]         | 6 |
| Technic Beam 7                                         | 32524     | Burnhamh                     | $8.00 [Beam Lot] 3
Technic Beam 9 40490 6
Technic Beam 11 32525 3
Technic Beam 13 41239 3
Technic Bush with Two Flanges 3713 NEXUS GM Brick Store $0.03 [1]         | 12 |
| Technic Bush 1/2 Smooth                         | 32123     | | | 27 |
| Technic Bush with Three Axles                 | 57585     | | | 1 |
| Technic Connector (Pin/Bush) w/ 2 Studs | 3651       | | | 6 |
| Technic Connector (Axle/Bush)                 | 32039     | | | 3 |
| Technic Cross Block 1 x 3 (Axle/Pin/Axle)| 32184     | | | 12 |
| Technic Cross Block 1 x 3 (Axle/Pin/Pin)  | 42003     | | | 6 |
| Technic Pin With Friction                           | 4459       | Pick a Brick                   | $0.10 [1] 29
Technic Pin Long with Friction 6558 Pick a Brick $0.25 [1]         | 24 |
| Technic Pin                                                | 3673 | | | 2 |
| Technic Pneumatic Air Tank                       | 58120     | NEXUS GM Brick Store| $14.90 [1] 1
Technic Pneumatic Valve with Pegholes 47223b Ile9os $13.00 [4]        | 6 |
| Technic Pneumatic Cylinder                      | 47224c01  | Ile9os                          | $38.00 [4] 6
Technic Pneumatic Pump 1 x 1 6L 99798a 1
Technic Pneumatic T-Piece 4697b Pick a Brick $0.10 [1]         | 5 |
| Plate 6 x 16                                               | 3027      | | | 1 |
| Pneumatic Hose - Various Length            | 5102      | Ile9os                               |Included with Valve| 1 |
| Electric Power Functions M Motor           | 8883      | Power Functions Shop     | $7.49 [1] 1
Electric Power Functions Battery Box 88000 Power Functions Shop $12.99 [1] 1

Construction:

Step 1: Pneumatic Cylinders
Place an axle 5 through the base of a pneumatic cylinder and secure it with a smooth 1/2 bush on each side. Place two notched axle 2's in opposite ends of a 180 degree angle connector. Use the axle slots on two axle/pin/axle cross blocks to secure the cylinder and angle connector to each other as shown. This step will need to be repeated 5 more times for each cylinder.

Step 2: Platform Foundation
Use the technic beams, pins with friction [black pins], long pins with friction [blue pins], axle 4's, and pin/axle connectors to build the foundation for the platform. This is the piece that the six pistons will be mounted to, and it will sit underneath the actual platform. The construction has been broken down into four substeps shown in the pictures below.

2.1)

2.2)

2.3)

2.4)

Step 3: Platform
The platform is based around a technic bush with three axles. Each axle will be built upon. First an axle/bush connector is attached to each axle with a notched axle 2 through it's other hole. Two 3 x 0.5 beams are attached to the notched axle. Two 4 x 0.5 beams are inserted in between the two 3 x 0.5 beams and secured with a pin with friction and a notched axle. At the end of the 4 x 0.5 beam an axle 4 is inserted with a pin/pin/axle cross-block and a smooth 1/2 bush to secure it.

Step 4: Motorized Compressor and Switch Bay
Use the technic bricks, pins with friction, and a beam 3 to build the frame of the compressor and switch bay. Use the technic axle 6's, bushes with two flanges, and axle joiners to secure the six valves to the frame. Then connect the hosing in the fashion shown below. Finally, add the motor, air tank, and pump to the top with a platform.

4.1)

4.2)

4.3)

4.4)

Step 5: Putting it all together

5.1)

5.2)

5.3)


Finished Project

Demonstration:

lego_stewart.txt · Last modified: 2016/03/15 00:55 by jadintredup