Engineering Notebook – 02/19/2019

Attendance:

Alex, Zach, Cameron

 

Goals:  

  • Work on things we would need for the groovy science night at elders-burg elementary

Meeting Notes Cameron

  • I set up the robot that catapults balls.
  • I found that the distance to catapult balls into a plastic bin consistently is 70 ½ to 71 inches.
  • I went over our new tri-fold board with the rest of the team, and how we are going to lay it out.

Engineering Notebook – 02/15/2019

Attendance:

Alex

 

Goals:  

  • To switch the program back to the original program with the adjusted values for the new worm gear mechanism on the linear lift.
  • Troubleshoot and fix any problems that the robot might have in the code or structurally before the next qualifier.
  • To practice driving the robot and improve at the things we are not so good with.

Meeting Notes Alex

  • Due to the fact that at the end of last meeting the members present decided that we should change back to the previous bucket so we had to change the code back to the previous values and positions in which the original bucket worked.
  • We also had to manually reposition the bucket so that it would work with the original positions because in order to add the new bucket on we had to rotate the bucket. We were then practicing for the upcoming qualifier which involved testing all the autonomous programs as well as test the TeleOp.

Engineering Notebook – 02/14/2019

Attendance:

Alex

 

Goals:  

  • Adjust the current positions in the code to allow the new bucket to work with the current autonomous programs.
  • Troubleshoot and fix any problems that the robot might have in the code or structurally before the next qualifier.
  • Practice driving and operating the robot with the new attachments.

Meeting Notes Alex

  • To make sure that the new bucket would work we made a new program to extend the x-rail and dump the team marker with the new bucket design. Because this worked when we tested it separately we changed the Gold_Marker_Crater_Auto program to incorporate the extension of the x-rail in order to drop the marker in the depot.
  • At the end of the meeting when we were testing the new bucket we realized that it was more inefficient and harder to use than the original bucket.

Engineering Notebook – 02/12/2019

Attendance:

Alex

 

Goals:  

  • To edit the current double positions that controlled where the bucket would rotate to. We had to do this because of a new bucket designed specifically for silver minerals instead of the other bucket that would take both.

Meeting Notes Alex

  • Edited the active TeleOp to add a position in which we could start the match inside the 18 inch cube, dump the silver minerals into the lander, move to a position in which the silver minerals would stay in the bucket while it moves, and a position that would allow us to expel any unwanted substance from the bucket.
  • Tested the Gold_Marker_Crater_Auto program to see if it would work or if change was necessary. As it turned out change was not necessary but positioning the robot correctly was.

Engineering Notebook – 02/09/2019

Attendance:

Cameron, Drew, Charles

 

Goals:  

  • Get bucket working
  • Fix XRail slipping

Meeting Notes Charles

  • We decided that to stop the XRail slipping we would attach a hub to the large gear so we can get a zip tie around the 2 gears that slip.
  • We took the XRail out of the robot to allow easier work.
  • We attached a hub to the gear using a modified Allen wrench that was shortened using a Dremmel to fit in the c channel.
  • We put a small gear on the other side of the hub to prevent the zip tie from falling off. When we put it where it should go, we realized that the small gear was touching a large gear, which would lock it up.
  • We took the small gear off and replaced it with another hub. A large gear would be in the way of the zip tie falling off.
  • When we tried to get 2 silver minerals with the bucket, they would get stuck. We decided to make a new bucket 5.5 inches tall (2* diameter of sphere) and only 4 inches long. The top would be open for the balls to go out.
  • We drew the net of the new bucket, cut it, and taped it. A piece of plastic was made that held the bucket together and showed where holes had to be made. We put 2 holes in the bucket, but since only every other hole had threads on the servo horn, we had to make 2 more for better alignment. We tested the bucket and it worked well. We will have to program new positions next meeting.

IMG_0299

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.