Building Instructions For NXT Beam Weapon

As promised, here are the building instructions and program for the NXT Beam Weapon. BTW, the pieces are not limited to one retail kit - there are several more - so you may have to substitute pieces or modify the design. Anyway, for this robot, I decided to try using LDD. It worked quite well. I really like the auto-snap feature, although at times it makes it hard to get a piece where you want it. It would be nice if you had the option to move pieces manually (like MLCAD) in case the auto-snap wasn't working.

I also noticed a couple things with the gears. One of our forum members was having trouble with putting a gear on an axle, because the auto-snap feature kept putting the axle through the wrong hole in the gear. I worked around this by putting an axle in a gear separately, and then putting the combination into the correct spot. I also found a way to get gears to mesh - just use the hinge tool to rotate one or both gears in small increments until they fit. I don't know if this would work for all gear-connections, though.

Anyway, about the building instructions... the zip file I linked to above contains the LDD file for the robot. You can generate building instructions in the file, plus you can mess around with the model to help you see the exact placement of pieces.

Since LDD didn't have a gear track part which I used on the robot, I just made a photo instruction, which you can see below... you can do this step last. Note that the two 1x3 beams on the bottom, keeping the gear track-beam from sliding out, should actually be one peg further up.

This gear track allows the trigger motor to push the bolt into the magazine to fire a beam. Ten 1x5 beams are used for ammo, and are loaded into the magazine horizontally, each stacked on top of the previous one. Feel free to mess around with other ammo, such as 1x3 beams or even little bushes and pegs. I tried loading a bunch of little bushes (not the vegetation kind, the technical "bushes") into the magazine, and the result was pretty funny (spreadshot!).

If you build this robot, let me know how it works!

-Jonathan

P.S. And no, I am not responsible for any deaths, broken bones, or any other injuries sustained from the use of this potentially lethal weapon. :P

Celebrating MINDSTORMS with a Remix - Part 3

The ROBOTMAK3RS continued their celebration of the 25th Anniversary of MINDSTORMS through these Fall and Winter remix projects. Each ROBOTMAK3R was tasked with selecting one LEGO set of their choice and combining it with a MINDSTORMS set. Below are the five amazing models they came up with. Braill3 by Jerry Nicholls Braill3 is an EV3-based LEGO Braille bricks reader. This robot uses its fingertip, made from three touch switches, to read messages written using the LEGO Braille bricks and will speak out what it detected. If it sees a simple maths problem it will attempt to solve it and give the answer as well. To learn more about the process of creating this machine, read Jerry's blog . Braill3 can be viewed here . Set Review: The Braille Bricks set is well thought out. The ratios of the letters is suitable for general use and the addition of some punctuation and arithmetic operators is excellent. There is a card showing what bricks there are and their quantities, but no form of sort...

Celebrating MINDSTORMS with a Remix - Part 2

The ROBOTMAK3RS continued their celebration of the 25th Anniversary of MINDSTORMS through these summer and fall remix projects. Each ROBOTMAK3R was tasked with selecting one LEGO set of their choice and combining it with a MINDSTORMS set. Below are the five amazing models they came up with. Remote controlled material handle r by Jozua van Ravenhorst (aka Mr Jo) This remix combines the LEGO Technic Material Handler (42144) with MINDSTORMS EV3 (31313) It uses the power of pneumatic cylinders to move objects around. By using a bluetooth remote control, very precise movements can be made with this model. Touch sensors in the base chassis prevent the turret twisting the cables that go through the turntable to much. The program has several protections to prevent over pressurizing the system for each of the 3 individual pumps and valves that control the 2 booms and claws. The real version of this machine is mostly used in waste material sites to bring the material to machines that sort and...

Celebrating 25 Years of MINDSTORMS

In celebration of the 25th Anniversary of MINDSTORMS, we take a trip through history. Please also visit ROBOTMAK3RS Community every week as we highlight different projects all through 2023 in celebration of the anniversary. Some of the early history is based on the content shared by Coder Shah in our MINDSTORMS EV3 Community Group . Some of the text and links may have been edited from his original posts for consistency and clarity. 1984 - Kjeld Kirk Kristiansen watched a TV program called "Talking Turtle," where MIT professor Seymour Papert demonstrated how children could control robot "turtles" using LOGO, a programming language he developed. 1988 - The collaboration between MIT and LEGO resulted in LEGO TC Logo in 1988, which allowed students to control LEGO models using computer commands. The video shows Papert demonstrating TC Logo. 1990 - LEGO TC Logo was hampered since the robots you built had to be tethered to a personal computer. LEGO and MIT...

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