How to make the combat robot

So you’ve decided to create a robot, but have heard that it is too difficult. I have for you is very welcome news. To make a competitive fighting robot, requires minimal technical skills to acquire that much easier than you think.

For example, I – a specialist in computers and have never in their lives faced with the need to improvise something with his hands. This continued until my children came up to me and did not say: “Dad, you’re doing us a robot, or we are looking for another father, who we do it.” So me and had to find out what is different from the bush lerki. 

But they came and asked, and I had to learn all this, and after a year or so (after many failed attempts) I have a good ultralight cuneate robot Anorexia (I gave him this name because he went a little) (Anorexia — “anorexia”). This robot can be seen on DVD, released Robot Club & Grill MAYHEM. Then Anorexia hook screw for the ceiling and in the process of repair has become a good truck, which would have been even better if I carefully drove the car.

(By the way, if you click any of the small images, it will be possible to see enlarged version.)

So, do not hesitate to shelve the case, proceed to the case. This year again, the children come to me and said that now they want their own robot, which simply must be at least some weapons. So I had to go back to the bench.

The case is complicated by the fact that I wanted was just to make a robot that can be used many before me have the spare parts (like batteries, speed controllers, etc.) and that for various “navorochek” use simple components: both easier and faster. The time I have been limited because prior to the qualifying competitions for the south-western states remained only a few months.

This sport (and the creation of the combat robot can be safely attributed to the sport) is constantly evolving, and now you can easily get a lot of proven components, through which even the novice will be able to build a good robot. In other words, I have basic skills, but to make a big box to transfer any torque arms I am not able to. Fortunately, neither me nor you do not want to.

In developing the design of the robot, we decided to operate on the principle that the best defense – the attack. All resources are aimed at weapon – blade lawn, which is driven by electric motor Magmotor. I save every gram to make the blade is the most difficult, and in the end, we got a whole block of tool steel weighing 6.9 pounds (3.13 kilograms), length 22 inches (56 centimeters).

Basically, I used standard parts, and if the design turned out to be unsuccessful, many elements could be replaced by more suitable. The decision proved right: the article describes the fourth version of the robot.
 

The first model was a something like the letter “T” made of aluminum with a lot of holes to reduce weight. Casters and wheels of the plane of rotation of the blades were directed at an angle to each other, so the robot can easily rotate, it is not moving their arms. However, when moving back was given rasp, as if kolyut nuts. You can not say that this is the best design, but with a disastrous shortage of opportunity to turn to the protection of the most dangerous enemy of his party seemed to me a great advantage.

Two weeks before the first intervention had to re-design. When moving the robot hub transfer box touches the ground, because of what he lost in maneuverability. Obliquely arranged wheels allow the robot to turn on pyatachke, but when moving back there have been problems.
 

So, I went back to the drawing board, and after a while I get the robot to the displaced axis of rotation, a bit reminiscent of a light 2EZ. At least, the train in welding.

At the competition showed that the robot had to be called “Kamikaze”, because after each attack, he overturns and completely defenseless. After one of the blows he had to ride across the scene. So, again, had to go back to the drawing board. 
 

This time was a simplified version of the first model. Leading wheel and hub arms located on one line, so it can freely rotate around this axis, and there were no problems when moving back. The frame was made of aluminum with tavrovym profile with a few holes to reduce weight, and a casing of the UHMW-plastic (plastic with ultra high molecular weight) to protect the rotating parts.

At the competition, our robot won with the score 5-0, of which 4 were knockout, and not only was the winner, but also received an invitation to national competition in 2004. Cheers! We have constructed a winner or not? Correct, NO. At the second competition was detected a fatal error. In every battle the frame to withstand the tremendous blows, throw the robot into the air and throw it back to the ground. A blade and transfer box were located between the driven wheels on a long aluminum girder, which pognulas. Impacts on the driving motors, and finally broke down and they are.
 

The whole tournament I held a “thin” engineering sledgehammer, vypravlyaya frame and replacing the engines. In the final battle have covered both of the leading engine and pognulas frame so that it became hurt sex scene. Last saved us. My son James, the driver of the robot, found that, including switching weapons can be moved and the robot and, consequently, rotate it. That we won the battle, and in the final credits were in third place.

So we went back to the drawing board and started to create a frame, a rigid to withstand the blows, but light enough to not have to abandon trehkilogrammovogo blades. And now I will try to convince you how easy it is – do the robot.
 

Before we begin, a few words about safety. Not enough to be careful during the battle of the robot is far more important to live up to it, creating a robot. In particular, this means the permanent use of protective equipment during work, such as protective glasses. Do not remove them, even if you do not use power tools. You will not believe how easy it is to damage the eye during a simple work, for example, clogging nail. That, and the truth do not believe it? Do a Google search on the phrase “nail in the eye”. But how? If this does not convince you to be cautious, then I will wash your hands. Be sure to work only in suitable clothing, the protection of the feet and hands. If you do not know how to properly use the tool, do not approach it until the learn how.

Do a favor (myself!): Hang goggles at the door of the workshop and do not even go there, not wearing them. Safety – this is what we have, Metal Munching Maniacs, pay great attention to: if you oslepnete will not be able to watch our DVD, but with hands otkromsannymi hard contact with the remote control. The work of our employees depends on the damage you have anything or not. There is no point in wasting time on explaining that the establishment of military robots – a very dangerous occupation, especially if it had to explain to blithely idiot. If you have it – safe, but when you drill a hole in the finger, we were requested not to blame.
 

Now I want to introduce to you new friend: Meet – this trammel. If you already have one, be sure to check out the Harbor Freight and buy a suitable (conventional model of length 6 inches (15 centimeters)). Purchase inexpensive instruments in the Harbor Freight – this is a kind of ritual, without which we can not be called the creator of a full-fledged combat robots. By the end of the article, you will have a whole list of things that want to buy in the store.

Trammel allows very precise measure and mark the different parts. This will allow you to place your hands a lot more than you can imagine. I have made in the studio of a small turning-milling machine Sherline and decided to make the entire frame independently. Here is what the victim had to go, if you want to drag you into this sport and to make buying our DVD.
 

In developing the robot, many are just loose on RAC system (design through your computer) (CAD – Computer Aided Design). I prefer to use another method with the same title RAC (design using cards; CAD – Card Aided Design). Of the various elements of the cards are cut and combined in different ways among themselves, to imagine how the robot will look like in reality. When is something worthwhile, a drawing created in a simple graphic program on my Macintosh.

The new design robot Totally Offensive many inherited from their predecessors, with minor improvements, thanks to experience gained in the competition. The arms are in front, leading the rear motors and shaft arms regards land (and thus slightly reduces the weight and I hope the bending moments acting on the frame). The frame is an aluminum channel T-shaped profile, a width of 3 inches (7.5 cm) in the form of the letter “T”. If I have not found suitable in the studio, would have to search for the nearest store or order appropriate in the Online Metals (there could even cut it as needed). Convenient that with sufficient strength within the channel is enough space for various items. On the top horizontal bar, I placed the battery (which is the engine under arms), and speed controllers are on the rear crossbar. All closed casing of UHMW-plastic (a great thing, I care of McMaster-Carr). Incidentally, this is a very good store of spare parts and high-quality instruments, not the cheapest, but with good service and great selection.