MechanicalDesign

UPDATED: 10-09-2010 to match rev5 hardware

Description

Overview of the system and/or a breakdown of the documentation format that follows.

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h2. Contact

Person(s) in charge of system design and/or maintenance.

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h2. Parts overview

See BOM for more details.

  • Materials: cast urethane, acrylic, 5052-H32 aluminum
  • Fasteners: #4-40, #2-56 CSK machine screws
  • Motors: 625rpm/15oz-in Micro Metal Gearmotors, 7.5deg Unipolar Stepper

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h2. Machining

  • Aluminum templates were machined from a waterjet, but can also be milled on a CNC.
  • Bent parts were formed using a small sheet metal bender and large pliers.
  • All countersinks for flathead screws added post bending
  • Rocker blocks machined on a 3-axis mill manually, but could be automated.
  • Standoffs cut from aluminum rod and drilled and tapped on a lathe.

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h2. Finishing

  • After all part forming is complete, burs are sanded or filed off
  • Each part is sandblasted for a uniform surface and to break sharp edges
  • Paint primer can be applied at this time
  • Basecoat is applied and allowed to cure for several hours
  • John Deere offered to powder coat chassis components - can do black, green, yellow, tan

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h2. References

Link to or list any resources used in the design of this system.