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Event Results / Re: Motorama 2020: Fairys,Ants,Hobbys,Feathers and Sportsman
« Last post by rcjunky on October 21, 2020, 12:04:22 am »
I believe Rob Farrow is the guy, I believe he would have been at BB so he's probably gonna want to take a vacation from bots for a week or 2 :P
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Event Results / Re: Motorama 2020: Fairys,Ants,Hobbys,Feathers and Sportsman
« Last post by AmbientChaos on October 20, 2020, 11:05:17 am »
Who is the one running the BotRanks?  It looks like there hasn't been any event results added in over a year now.
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Event Results / Re: Motorama 2020: Fairys,Ants,Hobbys,Feathers and Sportsman
« Last post by rcjunky on October 14, 2020, 12:30:05 am »
Can this be inputted in to the system by chance?
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Progress Reports / Re: Team Brain Damage
« Last post by zacodonnell on October 12, 2020, 04:27:59 pm »
I recently realized all of the links I had to the old build albums are broken because Google took down picasa and then google + images (where they were migrated when picasa went down). Somehow I stumbled on this link the other day that includes an archive of my albums. Here are a couple of interesting / recent ones.

Jack Reacher Moto 2013:
https://get.google.com/albumarchive/107279152885550274671/album/AF1QipN0H5DzRnTio4Nxi7gvCzopCEptv4eo_r0TGbXX

Magneato Moto 2014 (cotton gin / coil drum variant)
https://get.google.com/albumarchive/107279152885550274671/album/AF1QipM7_PXjOFmtJY2B81ki299Nnr7hGSa7PWhQlmMe

Magneato Moto 2016 (smaller coil drum, 4wd initial attempt that flopped)
https://get.google.com/albumarchive/107279152885550274671/album/AF1QipPN3seOa8-e_WDXZGZzrDDAvq3kdMvFLNH6XwKR

Magneato Moto 2017 (first electromagnetic clutch variant)
https://get.google.com/albumarchive/107279152885550274671/album/AF1QipOl7TQnN2nLyQWLYikZ1VNTdQ8AR6D8TcILsKlg


Shuttle Launch Bot Blast 2017 (screw powered flipper)
https://get.google.com/albumarchive/107279152885550274671/album/AF1QipN6SBM59c3gaH_kxEZSWbaZ5idZNVAd0PuZof4u

Tetanus FI 2011 (inline-AXI shell spinner with blade teeth)
https://get.google.com/albumarchive/107279152885550274671/album/AF1QipO1VonczWHjikX7o7jXMLMhP0P_is-0ZRQvGA6-

Tetanus Moto 2012 (big hammer teeth)
https://get.google.com/albumarchive/107279152885550274671/album/AF1QipPR64qFN_i8fBN-Ejkjwd5pxroavHD-XrJumJyQ
editor's note: once I switched to the hammer teeth on this shell I think the robot won every fight it was in by KO except for one until the shell was far too bent to continue at the end of Moto 2014. This was maybe my most successful bot of all time.


Triggo FI 2014 (inline axi, too-tall shell that was much stronger than the one in Tetanus)
https://get.google.com/albumarchive/107279152885550274671/album/AF1QipP1o6Ont0VenDeFi3cmlz7aFdio-Q6F2fGOjmyE

If people are looking for a bit of a historical fix on my machines that should take care of it

Zac
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Progress Reports / Re: Team Cosmos
« Last post by satacoy on September 30, 2020, 12:00:51 pm »
It is fun to read those old build reports. It's amazing how far some technology has come, and how some of those early ideas still haven't been fully realized.

I don't know if you remember our Sportsman from 2007 bot that used IR sensors to fire the hammer.  We had all sorts of fun with software simulators, then using the telemetry from the microcontroller to help us optimize our hammer speed ramp for quickest possible fire.  Unfortunately the hammer was too heavy, and it was less than impressive in real life.  Very Chomp-ish in a lot of ways.

Maybe it's time to get back into the sportsman at Moto.  I still enjoy the kinetic bots too, and really want to get my latest 12 pounder working a bit more, uh, functionally.
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Progress Reports / Re: Team Cosmos
« Last post by zacodonnell on September 29, 2020, 06:08:03 pm »
These kinds of projects are so cool. Your sensor description and trying to come up with a way for it to fit into a fighting robot reminded me of one of the earliest build reports I read after making my own robot:
https://madoverlord.com/wiki/doku.php/madoverlord:robots-battlebot

People have been doing neat stuff in this space for a long time. I think the sportsman class opens the door up a little more for this kind of thing, even something like meccanum wheels, because you don't have to face the giant spinners. I look forward to more people taking advantage of the opportunity to branch out into this space more. I like the spinners as much or more than the next person, but for a totally different reason. All-out destruction is fun, exciting, and showy, but also expensive, time consuming, and short-lived. Sportsman bots with custom control systems, sensors, and interesting weapons are cool for the engineer part of my brain rather than the entertainer part. I bet you could find a use for some of these techniques and concepts in there.

I'm especially interested in the setup you have for monitoring and telemetry. I've done some basic Arduino serial writing to debug the systems on Magneato, but I never took it as far as you did with a real time output graph, interactive commands, etc.  I always seem to run out of time to do that kind of tuning (just like you) but have never been ambitious enough to aim that high yet.  The 3d printed enclosures around the components are a nice touch. It makes it way easier to leave the wire/connectors on there and pull it out of a tool box to use as an actual tool. I'd love to add telemetry, status, and performance logging stuff to my machines at some point. Even just the graphs that come from the Castle ESCs can be fascinating when tied to the video for a fight.
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Progress Reports / Re: Team Cosmos
« Last post by satacoy on September 28, 2020, 12:14:49 am »
Hey Zac!  Glad to hear you liked the video.  Like many projects, Grond had promise, and I'd love to revisit it someday.  The number of 12 pounds events with steel floors aren't many, especially now that AVC dried up.  Having that event local gave me hope to try a lot of interesting things like that.  I'll have to make it out to a WAR event eventually, but I've been saying that for over 10 years now...

Also glad to know that the old Kinetic Energy calculator is still getting some use.  It seems like a lifetime ago I cracked open the old Machinist Handbook to write the original version.  IIRC, I was at my parents house for Christmas, and there wasn't much going on.  I think I wrote that first version in Notepad, and it was the first time I'd ever used Javascript.  Crazy.

With the event schedule drying up, I've been spending more time on the electronics side of the house lately, not necessarily robot-related.  I'm still looking for that killer app on the robotics side.


I never posted about this project much, it's yet another I'd like to revisit:

https://youtu.be/Q9JhXKi5yLI

This bot had mecanum wheels, LIDAR vision, and some additional sensors that let me do all sorts of things.  It could track the opponent, lock on to them, and then maintain a constant distance.  The stick on the transmitter would then either increase or decrease the distance from the opponent, and the "X" direction would circle around the opponent.  Sort of like old Zelda games.

Once I got it all built, I got tired of all the software challenges.  I believe I had 6 microcontrollers on there for various tasks, it was a little out of control.  Plus I realized that mecanum wheels are not very suited to combat.  But it was fun to lock onto a willing neighborhood kid, and watch them run away in panic, all the time the bot trying to maintain distance, and therefore "chasing" them.  The panic aspect was hilarious.

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Progress Reports / Re: Team Thrasher / Sunny Robotics
« Last post by zacodonnell on September 27, 2020, 08:07:59 pm »
This thread/video and some of Pete's work have got me excited again. I'm poking at some ideas for a sportsman concept I've been kicking around for a few years. I don't have the facilities to do much building right now but I am really enjoying the design work. Once I have it far enough along to decide if there is any chance of it actually working I'll post some of the thoughts and hopefully build reports here.

Thanks for the inspiration, and keep it up!

-Zac
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Progress Reports / Re: Team Cosmos
« Last post by zacodonnell on September 27, 2020, 08:05:28 pm »
I just saw your video on Grond from AVC:
https://www.youtube.com/watch?v=FrtgAsAf8lY

I very much enjoyed it. That kind of telemetry, tuning, and sensor work is exactly the kind of thing I'd love to have time to do with a version of my sportsman someday. Description videos that talk about the work and why you did it, where it might go from here, etc. are super interesting to me. I find myself with limited access to a shop at the moment, but videos like this and the gyro-walker bot posted here have got me excited about building again, even though the events are mostly drying up from COVID.

The reason I ran into the build report / video link at all was that I was doing some MOI calculations and my current computer setup doesn't have any form of 3D CAD so I was falling back to the old standby of the Cosmos calc. Thanks again for offering it!

-Zac
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Progress Reports / Re: Team Thrasher / Sunny Robotics
« Last post by rcjunky on September 02, 2020, 10:19:15 pm »
so what you're saying is you can add more s's as out figure out how to make it move more gooder :P
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