Archive for the ‘ 254 ’ Category

Today’s Progress

Today we began to manufacture the robot frame. Currently the CNC is turning them out after a laborious 3 passes in order to bore all the holes. Hopefully we will have them done and ready to ship out by tomorrow afternoon.

We also furthered our progress on the vacuum prototype, unfortunately with little success. Increasing the size of the hose running to the suction cup did not yield any positive results. We should continue to explore the benefits of the vacuum as it seems the most promising ball-manipulation system.

Manufacturing and Prototyping Progress

MANUFACTURING

Today, construction on the tensioner cams was completed.

PROTOTYPING

Today we did extensive prototyping with vacuums.  We continued to work with the two-stage impeller assembly hooked up to 2 fisher price motors.  The impellers are currently running with a 1:1 reduction off of the fisher price motors.  We hooked it up to a 4″ funnel which we mounted on the front of the 2009 drivebase.

The vaccum seems to work much better than any roller systems we have found.  It maintains good suction on the ball.  The only potential issue is getting the ball, which may be able to be solved with adequate driver practice.

2-Stage Vaccum Impeller Assembly

2-Stage Vaccum Impeller Assembly

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open source video, online video platform, video streaming, video solutions

open source video, online video platform, video streaming, video solutions

open source video, online video platform, video streaming, video solutions

Parts Out for Anodize

We dropped off the wheels, bearing housings, and gearbox spacers at the anodize shop today.  Hopefully we should see them back in a few days.

Design, Manufacturing and Prototyping Progress

DESIGN

Today, the design team worked to finalize the drivetrain.  The baseplate will be sent out to be cut by Mike D at NASA Kennedy’s waterjet shop first thing tomorrow morning.

MANUFACTURING

The CNC was running all day to cut all of the drivetrain tensioner cams.  They will be clear anodized.

A large group of students scotch brited wheels so that they are ready to be delivered to the anodize shop.  They will be delivered, along with the gearbox spacers and bearing housings, to the anodize shop tomorrow.

Polished Wheels

Towers of wheels after being polished, awaiting their trip to the anodize shop.

PROTOTYPING

Today, we continued to prototype Ball Retention Mechanisms.  We tested several different types of rollers and shafts on the balls with mixed results.  Several students and mentors also worked on modifying a 2 stage vaccum impeller to work with 2 FP motors.  More testing will occur tomorrow

Also, we were a little worried that the robot with a thick baseplate underneath wouldn’t make it over the ramp.  We decided to put a piece of polycarbonate on the bottom of the robot and test just to make sure.  The robot went over the ramp just fine, as demonstrated in the videos below.

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Manufacturing and Prototyping Progress

Today, Team 254 finished CNCing the wheel hubs for each team and cut the stock needed for the cams.   In the meantime, the CAD team continued tweaking the baseplate design and other groups continued working on prototype methods of handling the soccer balls.

One of the more successful protoypes the team developed was an intake roller that gave the ball backspin, keeping it close to the robot while the robot moved. The prototype is still in development, and various rollers and traction materials are being tested.

Manufacturing Progress

After almost 18 hours of machining the last two days we completed the first operation on all 70 wheels.  We began the second operation and now have 20 completed wheels.  The rest should be completed in ~3.5 hours tomorrow.  We also began making wheel and gearbox spacers.

Drivebase with Electronics Board Design

Drivebase (Isometric View)

Drivebase (Isometric View)

Drivebase (Top View)

Drivebase (Top View)

Drivebase (Section View)

Drivebase (Section View)

CAD and Prototyping Progress

Today, Team 254 prototyped a mechanism that keeps the ball in place while kicking and helps the release of the ball. We also mounted the kicking prototype onto our drive base prototype, and began to mount the holding mechanism.  We completed the CAD of our basic drive base, and came up with possible placements of the electronics board, as seen in our earlier post.

CAD Progress

Today, the CAD team continued to work on the drivebase frame.  The back bar for hanging was scrapped, out of concern that there would not be ample room between the bar and the bumpers for an alliance partner to get a hook in.  We extended the base plate to the very back of the frame and started to lay out electronics.  We are starting to think about what our ball handling mechanism will look like, and how to design the electronics to stay within the constraints that the ball handler gives us.

Layout A (Top View)

Layout A (Top View)

Layout A (Isometric View)

Layout A (Isometric View)

Layout B (Top View)

Layout B (Top View)

Layout B (Isometric View)

Layout B (Isometric View)

Organization & Machining

At the lab yesterday, the team continued working on improvements to their prototype .  The machining of the wheels has started, meaning we will soon be working on the tread for the wheels.  Finally, the team began organizing the bins filled with old motors and parts, as well as locating bearing blocks for the robot.