Day 11: Prototyping, Design, CAD, and Testing

by Trevor Salom '17

Programming

Today, the programmers worked on testing a VEX ultrasonic sensor to see whether the robot could use it to gauge its distance from the wall of the field. The VEX sensor was used as a temporary stand-in while the programming team awaits the arrival of the competition sensors.

Programmers reading the output from the robot

In addition, they continued working on applications to graph the feedback sent by the robot.

Design

Today, we continued the design of the robot and continued detailing the main intake, the shooter wheel and the actuating hood. The shooter is powered by two mini CIM motors with power transmission through small GT2 timing belts. The front intake has a 550 motor mounted on the end of the arm with a two-stage belt reduction aimed to give a roller surface speed around 15 ft/sec. This speed was determined by estimating the average robot speed while intaking (10 ft/s) and determining the amount of time we hope for an intake to take (

Current CAD model of the robot. Hood design is very rough.

Furthermore, we finalized the design of the baseplate and continued work on the design of a drill holder.

Manufacturing

Today, we began making the outer bearing housings. A large order of material arrived today from our aluminum supplier. The aluminum plate for the robot bellypan was dropped off at sponsor BAE systems for waterjet cutting. We expect the baseplate to be cut on Monday.

Furthermore, a number of team members cut tread today. This tread will be used on practice wheels for existing robots and may eventually be placed on the competition robot (once its wheels are made).

Builders attaching tread to the wheel hubs

Roller Intake Prototype

Work was also started on building a more refined version of the roller intake prototype. The intake will be raised and lowered by pistons, and will be based on a CAD drawing of the final design.

Action Items

  • Finalize Robot Design and CAD under Andrew Torrance and Mani Gnanasivam
  • Refine Intake Prototype under Dan Judnick
  • Programming and related testing with Brandon or Stephen
  • Help out the Media Team under Kevin or Maxwell
  • Ask a leader or mentor or request access following the instructions on the whiteboard to see what other tasks are listed on the Trello.