
"Success is dependent upon the glands - sweat glands." - Zig Ziglar
2013 Build Season Day 2
We were back at it this morning. Several of us spent well over 24 hours in the lab this weekend. We have done more prototyping in 2 days than we did all of last build season. School starts back up for St. Agnes tomorrow so we are going to have to back down our meeting times at least a bit.
We had an extremely productive day. After lunch we went down to our gym and played a game of Human Ultimate Ascent. We cut out a few mock goals and hung them up and had our team members act like robots. This gave us a bit of a feel for the game even though it’s just an exercise.
Shooter
We know that shooting discs is hard. Getting them accurate is even harder. We are currently looking at way to reduce how accurate our shooter has to be and how much time it takes us to aim the shooter. Below is one of the shooter prototypes from today. One of the things we learned is that traction on the disc is probably the most important factor when shooting.
To help us solve this incredibly hard challenge we built a 1/2.5 scale model of the pyramid. The idea is that we will have VEX robots climb the pyramid until we have a solution from our FRC robot. We have a few plans in the works that are looking promising. Hopefully we will have working prototypes by the end of the week.
Drive Train
After discussing drive train ideas it seems like we will go with the new Kit Bot that VEXpro is producing.
“Take calculated risks. That is quite different from being rash.” - George Patton
Ultimate Ascent Day #3: First prototype video
“Everyone wants to live on top of the mountain, but all the happiness and growth occurs while you're climbing it.” - Andy Rooney
Build Season Day 4: Things are looking good
So far everything has been going very smoothly this season. We have had parents bringing very delicious meals to the team, which we are very grateful for. One of our sponsors, Solarcraft, is going to be building us a real version of the pyramid. (Once it’s together, it will be available to all other teams to use at our school.) We can’t thank them enough for being so generous.
We’ve also been given permission to host the Houston area scrimmage in our school’s practice gym, so mark your calendar for the last weekend of build season. We should be able to have it February 16th, 17th, and 18th since we don’t have school on that Monday for President’s day. We would appreciate it if any local teams that have wooden versions of the goals bring them so we can have a full field.
As for the robot, the design is progressing extremely fast, possibly a bit too fast. We’ve identified a few problems with the design but we also keep finding solutions. We didn’t have any new shooter prototypes today; we are waiting for the smaller dune buggy wheels for that. We did make several versions of our collector and we think we are narrowing in on a workable solution. Tomorrow we should have a working prototype collector/indexer system that we can mount to the shooter and test together.
We did a lot of geometry today as well. Our shooter heights and angles are all looking promising for very accurate shooting. The packaging problem is still an issue. We’re planning for under-bumper collection of the discs so our collection/indexing system has to fit between our wheel wells. This is a hard challenge with the new dimensions but the smaller buggy wheels should help.
Our climbing/lift system has had some improvements. The new plan involves a 2 stage continuous lift. We’re hoping we can get a 30 point climb out of this but this is a reach. We’re very confident in the 20 point climb, though.
Size and weight are big concerns. Hopefully we will start getting things CADed and we can get a solid weight approximation soon.
- Spectrum
“Don’t tell me the sky’s the limit when there are footprints on the moon.” - Paul Brandt
2013 Day 5: prototyping everything
The mad race to get working prototypes continued for day 5. We made some new discoveries that we have to deal with in our designs but nothing seems to be setting us back too far.
Our climbing prototype is a VEX robot. It’s not yet functional but we’re getting much closer.
"Success comes through rapidly fixing our mistakes rather than getting things right the first time." ~ Tim Harford, author of Adapt: Why Success Always Starts with Failure
Day 6: It finally happened
Our design was going along a little too well. We knew something wasn’t right and we finally figured it out.
"The only real mistake is the one from which we learn nothing." - Henry Ford
Day 7: It's been a week
It’s strange how fast you can go from feeling way ahead to feeling behind. After far too much talking, math, CAD, and VEX prototypes we have decided to pay less attention to the climbing aspect of this game and just build an awesome shooter and collector. The goal is going to be to keep these weights as low as possible, so if inspiration does strike we will have room and weight for a climbing device on the back of our robot, assuming we can make it fit in the 54“ cylinder.
This plan may change seeing as we haven't had a consistent vision for the robot for over a day lately.
Our shooter isn't going as far as we would like with our smaller wheels. We need to get some more kinetic energy into the disc. We're thinking about possibly going to more wheels along the linear path.
There are a lot of question marks right now in our design. Do we go under the pyramid? What's the fastest 10 point hang? How far should our max shot be? Hopefully we can clear some of them up tomorrow so we can start doing production CAD and get things sent to the laser cutter.
We'll have our VEXpro chassis on Monday so we should be rolling (no electronics) early next week.
- Spectrum
I have learned an important principle: simple things work, often to our dumbfounded surprise, for we tend to distrust the simple and strive for the complex. - Richard Cracroft, “Our Trek Through the Wilderness”
Day 8: Coming back around
We had another long day but we made some good progress. We were even able to mount a prototype of the collector to Violet (our 2012 robot) and drive around a bit to test the collector. It still isn’t perfect but we think that’s our best subsystem so far.
The shooter is still under heavy development. We had to put a CIM back on our shooter to get the mass and acceleration we need into the disc. We are going to test a two wheel (in a row) shooter tomorrow, after the kit bot build day, and see if that solves are distance problem.We’ve begun the initial CAD development of the robot. The chassis is going to be VEXpro chassis and it’s an ideal base for the robot we want to build. We’re still getting a little creative with the wheel wells to give us room for collection.
Climbing is on the back burner but we still seem to be talking about it all the time. We’re hoping to find a way to climb (more than 10 points) with the real estate we have left on the robot but that is proving very challenging. We built the prototype of the motorless/actuatorless 10 point hang today.
We still have a lot of work to do and need to get parts to the laser cutter soon if we want to have the needed amount of driver practice for a game like this.
- Spectrum
“We don’t even have all the questions, yet, let alone all the answers.” - Michael Laine
Day 9: First Kit Bot Build Day
Today was the first of two Houston Area Kit Bot Build Days. Spectrum brought 15 people to the event to help teams, put together their kit chassis, and assemble their electronics. We were happy to see many of the teams that participated in our Mock Kickoff back in December. We love being able to help teams get their first taste of FRC. We’ll have another kit bot build day on the 27th, and if needed we might do a bumper build the morning of Feb 3rd.
- Spectrum
“Competition is very rarely as useful as cooperation. Our society is geared toward competition — rip each other’s throats out, survival of the fittest, yada yada. But humans are meant to work together for the survival of the tribe, and cooperation pools our resources and allows everyone to contribute what they can. It requires a whole other set of people skills to work cooperatively, but it’s well worth the effort.” - Leo Babauta
Day 10: Chassis Construction
We received our VEXpro chassis today and various other parts from VEX Robotics. This new line of off-the-shelf parts has been extremely useful this year.
"When given a choice, choose the thing that scares you a little. If it's 100% safe, it is holding you back." - Jeff Atwood
Day 11: Ultimate Ascent Shooter Testing
Several team members spent the better part of the last two days making the goals for us and they did a great job.
Full Specs on this implementation:
- Two wheeled linear shooter
- First Wheel
- Three 2 7/8" diameter, 0.4in thick Orange Banebots wheels with 1/2 hex bores bolted together
- (We don't think the bolts do much but we still thought to mention them.)
- Versaplanetary Gearbox 10:1 with 1/2" hex output shaft
- Banebots 550 motor
- 2nd wheel
- Two 2 7/8" diameter, 0.8in thick Green Banebots wheels with 1/2 hex bores
- Versaplanetary Gearbox modified to 1:1 with 1/2" hex output shaft
- BAG Motor
- About 2 inches between the two wheels
- Lexan opposite wall
- Plywood base
- We didn't measure the compression but it was around 1/4"
“The habit of doing more than is necessary can only be earned through practice. And the habit is priceless.” - Seth Godin
Day 12: Drive train is on the ground
We finished the VEXpro drive train, as we were wrapping up for the night. So no video tonight, but we should have some test driving videos tomorrow. We’re pleased with some of the modification decision we made and they seem to be working out so far. We had to do some minor adjustments to fix a few things, like a broken bearing in a gearbox, but other than that it looks good.
Shooter development continued for another day. We moved to two BAG motors and played with a lot of wheel combinations. We don’t think the type of Banebots wheels do that much to distance so we are planning to use the blue ones, hardest of the 3 types, so that they last longer.
We’re still working on our collection system and our feeder mechanism to move discs into the shooter wheels. These will both be critical to the success of our design.
CADing is now our main priority as we need to get drawings to our sponsors, sooner rather than later. Practice time is going to be as important this year as ever and we also want to spend a lot of time on our autonomous development as well.
Here is another shooter prototype video to hold people over.
"It is literally true that you can succeed best and quickest by helping others to succeed." - Napoleon Hill
Day 13: Drive Train Testing
We’re close to two weeks in and we finally have a moving drive train (with test electronics). We’re using the VEXpro Drive in a Day Chassis. So far we really like this version of a kit chassis. It’s customizable and very well suited for the new size requirements. It was specially designed for Ultimate Ascent and we think it’s going to play the game very nicely.
- VEXpro Chassis Kit
- 8 x VersaWheels
- 2 x VEXpro Single Speed Single Reduction 1:5.33 gearboxes
- 4 x CIM Motors (We will be adding #5 and #6 later)
- 2 x 15 tooth 1/2" hex sprockets
- 8 x 26 tooth VEXpro plate sprockets
- #35 Chain
- 1/2" Tube Axle Stock
- Nylon rollers for chain tensioners (we will be moving to delrin once the tubes come in)
- Bolts and Bearings
“You'll never get ahead of anyone as long as you try to get even with him.” - Lou Holtz
Day 14: Two weeks down four to go
Our current plan is to build a (mostly) functional prototype robot before we send off parts to the laser cutter. So many of the pieces have a lot of features jammed into them that we will need to work with them physically before we are confident enough to have them laser cut.
The VEXpro drive train is now riveted with 1/4“ steel rivets. We want to be extra sure our chassis won’t come apart. Here are a lot of pictures of our modifications to the chassis. We now have a full 15.5 inches between the wheel wells because we moved to a single loop of chain and the versawheels. We will be mounting CIMs #5 and #6 in the future.
The other systems are coming along, although a bit slowly. We're hoping to have something to mount on top of this in the near future.
- Spectrum
"I am looking for a lot of men who have an infinite capacity to not know what can’t be done." - Henry Ford
Day 15: Houston Mini Maker Faire
We took the day off from constructing our 2013 robot to take Violet out to the Houston Mini Maker Faire. It was a fun event that drew a lot interest. We were able to show FRC and VEX to over 2,500 people. It was also the first time we were able to distribute our new Elementary Engineering activity book that we designed for small children.
“The things you do for yourself are gone when you are gone, but the things you do for others remain as your legacy.” - Kalu Ndukwe Kalu
Versaplanetary 1:1 Conversion
1/23/13 Edit: VEX has released the Versaplanetary User Manual please look over this before following these instructions.
We have received a lot of questions about our 1:1 Versaplanetary conversion. It really is a simple process, but we thought we would post some pictures to help teams out.
Disclaimer: We don’t work with and are not sponsored by VEX Robotics. None of this should be taken as official recommendations by VEX or Innovation FIRST Inc. So far this has worked for us; your mileage may vary.
1. Purchase at Versaplanetary 10:1 gearbox (this does work with the other models, please see this post by Paul Copioli for more information).
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| (Note: A normal 10:1 has a 1/2" Hex output shaft. We are currently using it on our 3:1 so it's pictured with the 8mm output shaft; they work the same) |
Break down of a planetary Gearbox.
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| Sun Gear with male spline on the back |
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| Ring Gear |
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| Planet Gear |
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| Planet Carrier |
3. Note the splines on the output shaft and on the ring gear are the same.
4. The motor input stage has a female spline that matches the output spline and the sun gear.
6. Mount the input stage to the output stage. Make sure the small little pins are aligned so all the bolts will align.
"Ideas come from everything” - Alfred Hitchcock
Day 16
Into week three and we’re charging ahead.
"There are no secrets to success. It is the result of preparation, hard work, and learning from failure." - Colin Powell
Day 17: Starting to CAD
We've started the CADing process. Here is the start of a simple belly pan for the robot. It's going to get lots of holes for wires and electronics mounting.We're working on the CAD for our shooter, collector, and other systems as well.
One of the items we prototyped today were wings that fold out from the side of the robot under the bumpers to push frisbees towards our collector. That way if we hit a disc with any part of the front of our robot, it will hopefully be collected by our intake. The goal right now is for these to be spring actuated and deploy as soon as we move during autonomous mode.
We're also working on a pop up version of the "Can Opener" Hanging device. That way we can still drive under the pyramid during most of the match and then pop it up right before the end and hang quickly for 10 points.
- Spectrum
"Great discoveries and improvements invariably involve the cooperation of many minds. I may be given credit for having blazed the trail, but when I look at the subsequent developments I feel the credit is due to others rather than to myself." - Alexander Graham Bell
Day 18: Details
“The great thing about working hard is that you can always work harder, the great thing about being good is that you can always be better.” -- John V-Neun
Day 19






