Edoga 02/09/24
Thoughts on this year’s robot…
We have an achilles heel. I would say we have several, but really there is one blaring one and several smaller ones.
Before I get too into this, what are all of your thoughts on the andymark “climber in a box”? A part of me thinks all of our current problems with the system stem from user error, but I’m not 100% sure.
Ok, so one of them was clearly assembled wrong at first and jammed in the down position. The wrong screws were used for holding the bearing in place and they stuck through rubbing on the square tube inside. No one knew where he right screws were but a trip to the hardware store and $10 or so later we were back in business. Metric button cap screws are no joke when you buy 1 or two or 8 at a time…
A trip to the hardware store also means buying chocolate for our non-technical awards mentor. I try to do that on the regular to keep them happy and willing to come back.
Once we replaced the offending screws it worked like a champ,or well…should work like a champ? Haven’t actually run it yet.
The second one…This time the kids working on it had the first one to use as an example. They could look at the first one and use it as a guide, and they had access to the brain that struggled through.
It also jammed, but this time we knew we were using the correct screws to hold the bearings in place. Today we didn’t have a meeting and I went through and tried every possible combination of everything I could come up with trying to eliminate any binding points. I am settling on the idea that the bearings are just too thick. They are super close, but just a bit too thick. If I only installed the bearing on one side then everything works just fine. As soon as you try to install the second one you are in bind city.
(By bearing I am referring to the plastic bearings or guides that nest between the two tubes that slide past each other, not the roller bearings that are mounted on the bearing block.
Tomorrow I may try 3d printing a guide that is slightly thinner to see if that works.
This is the guy I am talking about. I shaved .043 off to make it .125 thick…Figure I’ll print 2 and see if they still work as guides without increasing the friction too badly. The jam nuts might not fit after though of course, which would completely defeat the purpose, but we will see…
It is really nice that everyone posts CADD models of their parts though…
Currently I guess the kids can just go without the block on one side and get the robot 1 step closer to working…
So…back to the thick of it.
Our intake…It may work, it may not work…We haven’t really gotten to test it and it is like hitting a wall trying to push them to get it done enough to actually test things.
Also, the handoff between our intake and out launcher. That part is fixable, but is probably going to take a lot of work. The intake feeds notes into a couple of wheels that then feed the note into the launcher. The problem is the feeder wheels are too far away and there isn’t enough contact between them and the note unless the intake feeds it in at full send.
The intake may or may not have enough friction to actually pick up notes without them being squished up against the wall. The kids are afraid that increasing the grip of our intake might shred notes…I just want to find a solution and fast before we wake up unable to do anything other than launch a preloaded note at the beginning of a match and then play bumper cars for the rest of the time.
Circled in red = sometimes not grippy enough. Then again it is just smooth polycarb and the two rollers do make note zest when they are spinning. The concern is that if we make them more grippy they will just rip the notes to shreds.
Fingers crossed that works out because we don’t have another way to get notes. Our launcher can’t feed notes backwards from the source. In fact the notes drop into the robot making it so that we would be dead in the water.
And that is it isn’t it…I have a feeling this is going to be a very high scoring game. Looking at what is out there already, between the everybot and all the robot in 3 days bots, there are going to be a ton of robots that can score in the speaker relatively quickly and reliably from known positions, so pressed up against the subwoofer, and climb at the end of a match. Couple that with teams using the same subsystem to score in the amp say 80% of the time and robots designed specifically for scoring in the amp and you’re down to the alliances that can successfully complete the most cycles in a match.
Ok, so that seems pretty obvious…I sort of do like the idea of a team building a robot that just shoots notes onto the other side of the field for their alliance partners to pick up and score, but also realize that that would also shorten the cycle time for the opposing alliance if they could snap stuff up before the intended robot did…
But again, as with every year reliability is going to be key.
Now I know Chief delphi is a bit skewed. The teams/people accessing chief delphi have access to this information and wealth of knowledge. They know what a number of other people and teams are thinking and planning and can respond accordingly, but it is a hard gamble to think that you are “OK” where you are
I feel like a lot of the people on my team have hit a wall of sorts. Things get mostly done and then abandoned so very little is actually getting tested in any meaningful way. I understand that we still have 5 long days and 2 weeks to work on the robot, but I worry that the closer we get the less we seem to be getting done.
Maybe I”m reading too much into this, but I feel like getting the team to actually finish anything or deal with problems that we pretty well know are going to be problems is like pulling teeth…and I’m tired.
Honestly this year has been a bit more of a struggle for me than I would like to admit. I think burnout is too strong of a term, but…I have some health issues. I have always had health issues, so that is nothing new, but I’ve usually been able to either work through them or they have been bad enough to take me out all together. This year is a bit different.
So…in 2016 I was diagnosed with hodgkin’s lymphoma (a type or treatable cancer) for the second time. (seriously almost exactly 20 years after the first bout back in college) The cancer was labeled “persistent”, and I was told that I might experience long periods of relative health with periodic outbreaks that I would have to deal with. Somewhere on the order of 5 - 20 years of health between needing treatment. In 2020 I was diagnosed with non-hodgkin’s lymphoma. So…a new type, also thought to be persistent, but treatable if caught early.
So they wiped out my immune system at the beginning of the pandemic. Yay for me!
It hasn’t come back much at all. My wife and I joke every time I get a flu shot or covid vaccine I don’t experience any side effects. None…It doesn’t bother me at all. Oddly, mosquito bites don’t really bother me either. But…My doctors currently think I have some sort of autoimmune disorder. So the little bit of immune system that I do have is attacking my intestine and joints.
Some of my doctors think it is Crohn’s disease. Others think it may be rheumatoid arthritis. (the latter makes sense because my mom has it.) It could also be psoriatic arthritis and irritable bowel syndrome. Basically I have all the things, and it is making me much more tired and snippy than I would ever want to be.
It is making this year harder, not just for me, but for all of the people around me.
I get tired faster.
I don’t have the energy to push the team to do any of the big things anymore and it just makes me not want to do any of it.
A part of me knows, once they actually know what is wrong with me and start treating it then things will be more manageable…or not…but at least I’ll know and knowing is half the battle.
Maybe I just need more sleep.
Ok. I’ll try to include more pictures and videos tomorrow.
Enough for now.
Edoga