BEAM Online - The Yahoo of BEAM!



Creator: Friedrich J. Tragauer
Web Site: Sun Beam
Bot Name: Solaroller 1
Description: My first solaroller. I also have step by step instructions on how to build the mechanics of it on my web site.
Creator: Kristoffer
Web Site: Robot Central
Bot name: Speedoroller
Description: This is my first BEAM creation ever. it's the LM 3909 solarengine and is very SLOW!. It isn't really what the name say's :-)
Creator: Ivar Thorson
Web Site: Basic BEAM Robotics
Bot name: ??????
Description: A solaroller. It's a 3 wheeler, with the back two wheels powered by a walkman motor, and the front wheel attached by some small wire. It is pretty fast, and does a "wheelie" every time it fires. My first BEAM 'bot. I used a walkman motor and 3 little rubber "cassette pincher" thingys as wheels. It only took me about an hour to build.
Creator: Ivar Thorson
Web Site: Basic BEAM Robotics
Bot name: ??????
Description: My first solaroller (above) was reincarnated in this high(er) performance BEAM beast. I set out to make a solaroller that had more speed than the original one, and I wanted less of a "pop" movement and more "vroom". After soldering the thing together 6-8 times (not kidding, I am a miserable at soldering), I finally got it to work. Was I surprised! With the current 0.1 Farad capacitor I have on the solaroller, it will charge up in about 20 seconds (3:00PM, mostly sunny day), and go consistently 28 inches in one "vroom!". The design has two key things that affect it's performance: the size of the capacitor, anda unique little mistake that makes the solaroller coast when the motor has stopped running. There is a rubber pinchroller that is attached to the output shaft of the motor with the hole drilled off center. The pinchroller touches the wheel to power the solaroller. When the off-centered pinchroller spins, it shakes almost like a pager motor with a weight attached. Because of this shaking motion, the pinchroller only touches the wheel for about half of it's rotation. The solaroller accelerates fine, even with only half it's rotation being harnessed. When the entire capacitor has been emptied, the solaroller had enough momentum to turn over the motor half a turn, which then moves the off-centered pinchroller away from the wheel. Now the solaroller is in coast, and goes for about 10 inches or so with no power. By the way, the wheel is a another pinchroller from a VCR, making the design a bicycle with a wide back tire. With some tweaking in capacitor size and other parts, it could do a complete meter in less than 30 seconds, I am guessing. Almost competitive with some of the other solarollers out there.
Creator: Miller
Web Site: Solarbotics
Bot name: ??????
Description: A very speedy solaroller. When operating correctly, it'll cover the one meter drag strip in 12 seconds in noon-day sunlight. It unfortunately got hung up on the starting line at the '95 BEAM games, and did not finish. Built from brass & aluminum tubing and utilizing a large fine-tooth gear as a rear wheel, this bearinged solaroller looked like it had the event zipped up...until that 11 year old showed up with his giant killer (hopefully picture to come).
Creator: Dave
Web Site: Solarbotics
Bot name: Sluggy
Description: The BEAM '94 Solaroller Champ! (1 meter in 2 min 9 sec). One of my first BEAM devices, it was the one to bring the world of solaroller racing down from the 15 and 25 minute marks to the under 3 minute marks. Just like any other technology, evolution produces better and better devices.
Creator: Dave
Web Site: Solarbotics
Bot name: Herbie
Description: My 4WD Solaroller, Herbie. Constructed from Walkman & pager castoffs. Herbie has been a favorite of kids, and thus is currently in need of a little TLC (tools, luck, & copper) to return to his former state of performance. In daylight Herbie would charge for 30 seconds and sprint approximately 7 inches. Unfortunately, the short wheelbase makes Herbie travel in not-so-straight lines, which is quite detrimental in class-2 Solaroller drag races where there are obstacles to overcome. Construction is 1/8" copper-clad welding rod (TIG rod); brass tubing, one walkman, one pager motor, and one type-2 HBS based solarengine.
Creator: Chris Daniel
Web Site: BEAM Robotics
Bot name: Speedy
Description: Speedy originally used a 0.033F cap, but the internal resistance was too high, so now it has a 1F cap until I get a smaller one. It's very fast, but it takes a LONG time to charge. When it does fire, it goes for about 30 seconds.


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