Engineering Notebook – 02/08/2019

Attendance:

Charles, Drew, Alex, Cameron

 

Goals:  

  • Finish bucket and attach it to the robot
  • Fix worm gear on linear lift
  • Make prototype for the x rail worm gear
  • Get the X-rail to extend and retract

Meeting Notes Charles

  • Charles cut out the bucket, folded it, then taped it. We had to make some adjustments, such as leaving 1/8th inch out of the cutme for one of the segments, so the one adjacent to it would have something to be supported by.
  • We cut 4 holes in the bucket and attached it to the servo. One of the screws wasn’t going in, so we tried putting another screw into the servo horn, but it also didn’t work. When we tried another hole, it worked, so we used all holes except that one.
  • One of the stages of XRail wasn’t coming in when we tried to bring it in. When we looked at the surgical tubing, it wasn’t attached to the other stage, it was in the middle of the XRail. We tied a string to the surgical tubing and fed it through. It contracted well after that.
  • When we tested the new bucket, the robot wasn’t driving correctly. We saw that the mechanum wheels didn’t make an x. After that was changed, it worked well.
  • The XRail was falling more than usual because a lot of bolts it used for support were loose. We tightened those.

Meeting Notes Alex

  • Built a prototype of the mechanism that will be used to make the x-rail move more efficiently.
  • Made a program that would make the mechanism designed work.

Meeting Notes Cameron

  • I reverse-engineered a mechanism that used a worm gear to extend C-channels, to build another system that extended and retracted multiple C-channels.
  • I had to move a bracing C-channel and reposition an axle to rotate the C-channels properly.

Engineering Notebook – 02/07/2019

Attendance:

Charles

 

Goals:  

  • Make prototype for work gear turning x rail

Meeting Notes Charles

  • It was decided that it would be better to have a worm gear rotate the x rail because it is stronger, smaller, and faster.
  • The worm gear system was made and the x rail was attached to it. When it was tested, the XRail fell down. The problem was a loose set screw. After it was tightened, it worked well. On the actual robot, there will be many hubs to avoid this problem.
  • It was decided that the bucket should use rubber bands closer together than the diameter of the spheres, so the spheres will squeeze through the rubber bands, then sit on top of them since they are light. We will be by the silver side of the lander, so it will be fast. The net for the bucket was made, but not cut yet. That will be a goal for tomorrow.

Meeting Notes Cameron

  • I connected an axle to the servo’s hub and a U-bracket on to the X-rail.
  • I attached an axle through the bucket to rotate it.

Engineering Notebook – 02/06/2019

Attendance:

Alex, Drew, Zach

 

Goals:  

  • To prototype a design to see if the worm gear would hold the weight of the
    whole robot.
  • Try and fix the autonomous program so it will work during competition.

Meeting Notes Alex

  • Built a worm gear mechanism with the motor facing down
  • Attached a prototype of the worm gear mechanism in place of the linear lift
    to raise and lower the robot.
  • Experimented with worm gears.

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Engineering Notebook – 02/04/2019

Attendance:

Alex, Cameron, Zach, Drew

 

Goals:  

  • Finish assembling the full field
  • Discuss and attempt to solve the problems with the robot
  • Attempt to fix the autonomous program
  • Investigate different ways to make the linear lift go faster
  • Increase the efficiency of the robots driving skills by replacing the mecanum wheels

Meeting Notes Alex

  • We finished building the full field.

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  • We started to work on the autonomous program as the robot was not unhooking from the latch.
  • We raised the linear lift by a bit and found that that worked. We need to measure the distance and change the autonomous program.
  • We noticed that the meccanum wheels were digging into the mat.
  • We then swapped the meccanum wheels and ran the program again.
  • The meccanum wheels were still digging into the mat.

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Meeting Notes Zach

  • I started creating a new linear lift that used a worm gear instead of rack and pinion.

Meeting Notes Cameron

  • I removed and replaced hubs on old mecanum Wheels.
  • I added a new motor hubs to the new gray mecanum wheels.
  • I added the new mecanum wheels to the robot.

 

 

Engineering Notebook – 02/01/2019

Attendance:

Charles, Alex, Cameron, Zach

 

Goals:  

  • Finish double x rail bucket extension prototype
  • Finish chain controlled linear lift
  • Assemble mats and new field and ensure autonomous programs still work

Meeting Notes Alex

  • Helped assemble the full field that was recently bought.
  • Attempted to make a program that would fix the problem with the robot which was that the left wheels would get wedged into the mat.
  • Helped team mates when they needed it.

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Meeting Notes Charles

  • Charles and Cameron worked on the x rail system.
  • We got a new linear actuator system today, but decided not to use it since it’s circular, and tough to attach things to it.
  • We had to move one of the xrails farther away from the other so we could fit the bucket between them.
  • Since our axle has a limited length, we put the pulleys for the second x rail on the inside.
  • We attached the servo and c channel to the x rail so we could put an axle through, supporting our bucket.

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Meeting Notes Zach

  • Put a c-channel underneath the new linear lift to move it up off the wood because a sprocket was hitting the wood.
  • Attached the rest of the sprockets and attached the chain.
  • Put in a bolt and twisty tied the chain to the linear lift so when the chain turns the lift raises and falls.
  • Cleaned up the mess on the work bench.
  • Got the show robot working for tomorrow’s exhibition.

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