2009:Robot Design Details

Main Robot Design

General layout design of the robot, Dimensions ARE NOT exact.

 

     

Drivetrain

• 4-wheel drive
• Banebots Transmissions
• 4 2.5" CIM motors
• Victor 884 [Drive] Speed Controllers
• Fixed wheels (slip-style steering)
  
• Banebots encoders on each wheel (http://banebots.com/pc/ELECTRONICS/EN-G0561-KT) -- mounted at transmission outputs.
• 27.25” LONG x 37.25” WIDE
  
• Rear wheel axis at 5.625 from most rear surfaces (adjustable down to 4.625 corner brace regime permitting)
  
• Front wheel axis at 11.625 from front most surfaces (adjustable ± 2.00”)
• Still need to determine a few hardware items but I think we could use a few PEM fasteners to further minimize fastener system weight
• We will need to design a few spacers “on the fly” as we determine the best approach while building
• The 6-hole patterns in the wheels need to be tapped for 10-32 Depth TBD
• Need to add the stiffener element between the wheels (1/side 1”x1” ext. Al stock is light and will work well and can be welded)
• Need to cut necessary smaller frame elements from stock
• Need to design in provisions for front “dummy wheels” biased 1/8” up for roll over protection

• Need to order the following parts from the shop by tomorrow (01/09/2009):
• 2009-wheel-hub (1/8 wheel retainer plate) QTY:4
• Hub-bearing (just a spacer in the hub for support not a bearing) QTY:4
• Brkt-wheel-asy-1 (trans/motor mount left front and right rear) QTY:2
• Brkt-wheel-asy-2 (trans/motor mount left rear and right front) QTY:2
• Bearing-block (main double bearing holder for each drive assembly) QTY:4
  

Lower Ball Collector

• Is now part of the front conveyor

Ball Hopper

• Open top entry for human player introduction
• Entry from conveyor at top of robot; entry controlled by upper ejector
• Exit is a "trap door" at the bottom of the hopper down to the area behind the lower ball collector and at the base of the conveyor system.
• Trap door and Lower collection blocker powered by Nippon Denso Window motor (possibly a rack & pinion arrangement?)
• Two Limit Switches sensors to tell when door is in open/closed position
• Jaguar speed controller

Ball Conveyor

• Two conveyors opposite each other, working together to move balls from ball intake and/or below the ball hopper up to the upper ball ejector/hopper entry point.
• Powered by two independent motors (RS-545 Banebots motors with 25:1 reduction gearboxes)
• XXX sensor to detect ball "ready to shoot" at the top of the conveyor.
• Jaguar speed controller
• Sensor to detect that conveyor is full

Upper Ball Ejector

• Spinning ejector directs, based on direction, balls out of robot or in to hopper entry point.
• Powered by Fischer Price 00968-2910 motor with plastic gearbox removed and AndyMark 67:1 Gearbox added
• Jaguar speed controller