RC08Chassis

As part of the RoboCup 2008 Mechanical, this is the skeleton of the robots everything attaches to it.

Assembly Structure

Parts List

1. 2 - Drive Module (RC-2008-03-00)
2. 2 - Drive Module Mirror (RC-2008-03-00-M)
3. 1 - Dribbler (RC-2008-04-00)
4. 1 - Kicker / Chipper (RC-2008-05-00)
5. 1 - Bottom Plate (RC-2008-07-01)
6. 1 - Electrical Plate (RC-2008-07-03)
7. 4 - 2 1/2" Long Hex Standoffs (RC-2008-07-02)
8. 10 - 6-32 1/4" Long (RC-2008-07-04)
9. 8 - 8-32 3/8"Long (RC-2008-03-13)
10. 8 - 8-32 Nylon Lock Nuts (RC-2008-07-05)
11. 1 - Electrical Board (RC-2008-07-06)

Configuration Notes

1. Due to space constraints drive modules are not orthogonal. They are X degrees off inward. (See drawings)

Parts & Components

Stock

Top Plates

Vendor - McMaster-Carr

Part No. - 89015K39

Cost - $43.33 Each

Description - Alloy 6061 Aluminum Sheet .063" Thick, 24" X 24"

Bottom Plate

Vendor - McMaster-Carr

Part No. - 8885K18

Cost - $35.62 Each

Description - Alloy 7075 Aluminum Sheet .050" Thick, 12" X 24"

Antenna Supporting Plate

Vendor - McMaster-Carr

Part No. - 8574K38

Cost - $6.29 Each

Description - Polycarbonate Sheet 1/16" Thick, 12" X 24", Clear

Fasteners

6-32 Low Head Socket Cap Screw

Vendor - McMaster-Carr

Part No. - 92220A141

Cost - $7.42 (Packs of 25)

Description - Alloy Steel Low Head Socket Cap Screw 6-32 Thread, 1/4" Length

8-32 Low Head Socket Cap Screw

Vendor - McMaster-Carr

Part No. - 92220A152

Cost - $11.60 (Packs of 100)

Description - Alloy Steel Low Head Socket Cap Screw 8-32 Thread, 3/8" Length

8-32 Nylon Lock Nut

Vendor - McMaster-Carr

Part No. - 90633A009

Cost - $2.21 (Packs of 100)

Description - Grade 2 Hex Thin (Jam) Nylon-Insert Locknut Zinc-Pltd Steel, 8-32 Screw Size, 11/32" W, 11/64" H

Other

1/4" Hex Standoff 2.5"

Vendor - DigiKey

Part No. - 1825K-ND

Cost - $1.14 Each (must order min 10)

Description - STANDOFF HEX 6-32THR 2.5"L ALUM

1/4" Hex Standoff 0.25"

Vendor - DigiKey

Part No. - 8717K-ND

Cost - $0.394 Each (must order min 10)

Description - STANDOFF HEX M/F 6-32 .250" ALUM

1/4" Hex Standoff 0.25"

Vendor - DigiKey

Part No. - 2208K-ND

Cost - $0.307 Each (must order min 10)

Description - STANDOFF HEX 6-32THR .250" ALUM

1/4" Hex Standoff 0.75"

Vendor - DigiKey

Part No. - 8416K-ND

Cost - $0.471 Each (must order min 10)

Description - STANDOFF HEX 6-32 0.75"L ALUM MALE FEMALE

1/4" Hex Standoff 1.25"

Vendor - DigiKey

Part No. - 1818K-ND

Cost - $0.776 Each (must order min 10)

Description - STANDOFF HEX 6-32THR 1.25"L ALUM

6-32 Low Head Socket Cap Screw

Vendor - McMaster-Carr

Part No. - 92220A144

Cost - $8.75 (Packs of 25)

Description - Alloy Steel Low Head Socket Cap Screw 6-32 Thread, 5/8" Length

Shell

Vendor - McMaster-Carr

Part No. - 91780A209

Cost - $0.44

Description - Aluminum Female Threaded Hex Standoff 1/4" Hex, 7/8" Length, 6-32 Screw Size

Vendor - McMaster-Carr

Part No. - 91780A339

Cost - $0.93

Description - Aluminum Female Threaded Hex Standoff 1/4" Hex, 2" Length, 6-32 Screw Size

Vendor - McMaster-Carr

Part No. - 91565A315

Cost - %6.58 (Pack of 100)

Description - Plain Steel Fully Threaded Stud 6-32 Thread, 1/2" Length

Action Log

1. 01/03/2008 - Bottom plate prototype completed.
2. 02/15/2008 - Top plate prototype completed.
3. 03/18/2008 - Ground clearance concerns have prompted investigating into correcting.

   Notes - Possible fixes, larger omni wheels, moving wheels down.

4. 03/30/2008 - Moving wheels down has been selected for fixing ground clearance.
5. 04/08/2008 - Standoffs for the electrical boards up to the shell have been found and overall height for the robot has been finalized.
6. 04/10/2008 - We have decided to go with pressing for creating space for output gears on the bottom plate. This allows us to move the wheels down for additional ground clearance.
7. 04/10/2008 - Cutouts for motor wires need to be moved in some to allow for more slack and connection with electrical board.
8. 04/15/2008 - Die for stamping bottom plate gear allowances has been made and the process produces successful results.
9. 04/22/2008 - Bigger cutouts for drive motor cabling, addition of antenna support plate, standoff change.
10. 05/15/2008 - Standoffs changed and selected.
11. 05/17/2008 - Mostly complete ball sensor integration accomplished.