MARS 2614 - 2020 Robot: MARVIN XIII

Despite the interruption due to COVID-19, team MARS 2614 was lucky enough to build a robot and compete with it at the 2020 Palmetto Regional, ranking 3rd, finishing as regional finalists, and winning the Excellence in Engineering Award for the first time in team history. We had a little bit of time afterward to make some modifications, but stopped all in-person work in March. Small teams have since returned to update software and test new machine features, and I got a chance to go in and make a 2020 reveal video. This is certainly belated, but we’re proud to introduce MARVIN XIII.

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MARVIN XIII Technical Information


Drivetrain

Climber

  • All versaframe and waterjet parts
  • Powered by two 775pro motors
  • Flips up and extends to maximize stability and decrease complexity
  • “Skywalker” to translate along bar and auto-balance the generator switch

Intake (Version 2)

  • Powered by two Neo 550 motors
  • Deployed by twin pneumatic cylinders
  • Lexan construction resists bending and conforms to impacts

Magazine (Version 2)

  • Linear indexer with no polycord belts
  • Powered agitators in intake basin
  • Fitted with sensors for full autonomous control and indexing
  • Designed to reduce the effect of ball damage on shooting

Shooter

  • Based on 1241’s 2016 shooter design, modified for six inch balls, new motors, and some small design fixes
  • Powered by 2 NEO motors
  • 4" tri-fairlane flywheel
  • Limelight 2+ vision tracking
  • Single bearing & flat plate turret design to reduce complexity and speed up manufacturing

Electronics

  • “Flip-Out” panels to increase working space but save space on-robot
  • Mix of Spark Max and Talon SRX

Other Unique Features

  • Lightest robot ever built by 2614 at 104lbs
  • Modular subsystem design, allowing for complete redesigns of the Magazine and Intake after the Palmetto Regional
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Was the intake originally a mechanum one at Palmetto or am I misremembering?

Yes. The original intake used mechanum wheels, but we choose to move in a different direction following the event.

Here’s a picture of the original design.

4 Likes

Sweet robot. Love the hanging mechanism. I am very glad that we got to play on the same side of the field for once. Hopefully we will get to pair up again soon.

How do you alaign the power cells, form the intake to the magazine mechanism?

We used to have an exterior mecanum wheel intake with 125’s 3DP mecanum wheels. Now, we have a powered V similar to the spectrum design except it’s completely vertical. It took some space juggling to get everything within the tiny area. We have the wedges mounted on the flipped gearboxes. Only one side (shown) is powered.

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