The enemy is knocked out when it is unable to show controlled, translational movement for 10 seconds. This includes being flipped upside-down even if the wheels can still spin. Make sure your bot can drive upside-down, or has some way to get itself back on its feet! Once a bot appears to be knocked out, a judge or announcer will start a countdown from If the robot doesn't move in time, the fight is over and they lose.
A tap-out occurs when the enemy decides to surrender. Usually this is because they do not want their robot to be damaged further or an expensive component is exposed. This is a very viable option in double-elimination tournaments because you still want your bot to able to fight next time! If the arena has a pit or gaps in the wall, it is possible to "push out" the enemy. If the arena you are competing in has these hazards, be careful! Falling into a pit or being knocked out of the arena is an immediate loss.
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After the 3 minutes are over and both bots are still standing, the designated event judges will decide who the victor is. The criteria is usally composed of 3 factors: Damage, Aggression, and Control. So be sure to demonstrate these 3 tactics during your fight! There are a few rules to keep in mind when designing, and operating a combat robot.
These rules are essential for fun and safe competitions. Keep in mind that the following just cover a broad definition of the rules. It is essential to check the specific rules of each event you go to as there may will be differences. A pin occurs when a bot holds an enemy bot against a wall for a long period of time.
After 10 seconds, the pined bot must be released. A pin will then be scored for the "pinner" and can factor into their aggression and control points. A hold occurs when a bot holds an enemy bot in the air for a long period of time. After 30 seconds, the held bot must be released.
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Just like pinning, scoring a hold will also give you more points in the judges' decision. Now that you understand the basics of how robot combat works, let's explore the many different types of combat robots there are. To start, we'll take a look at some example antweight robots.
Click on a bot to learn more! McMaster-Carr is a fantastic resource for finding raw buliding materials and basically anything hardware-related. FingerTech Robotics is another great resource, especially for titanium. In antweight combat robotics, all of the commonly used materials can be found on McMaster-Carr, or your local hardware store.
Depending on your application, there are several different filaments to consider including but not limited to: Filaments like PLA are often used for internal pieces as it is a lightweight and easy to print filament. However, it is very brittle and can shatter when impacted. Lastly, filaments like NylonX and Oynx make for great chassis materials as they are lightweight and strong. These filaments contain strains of carbon fiber mixed with the plastic to create an even stronger material. Odium, built by David Rush pictured to the right , uses a strong, yet lightweight Onyx frame to support its deadly weapon.
If you don't own a 3D-printer, there are several services online that can print your design for a fee. For a strong Onyx print, we recommend the services of EndBots. Their service is fast, accurate, and simple Simply send them your. Visit their website for more details. Most batteries in antweight robots are LiPo's because they are compact and light. LiPo stands for "lithium polymer", which is the chemical composition used. LiPo batteries come in different cell counts and capacities. Antweights typically use a 3s which means "3 cells" LiPo battery.
Each cell of a LiPo battery is 3. The next factor in determining which battery to pick is its capacity, which is measured in maAh milliamp hours. So if a battery is mah, it could suppy power to a milliamp system for an hour, or a 2 amp system for.
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Robots like spinners and drums will need a higher capacity than robots with wedges or flippers. The key is to be able to have enough battery life to make through the end of the match without adding too much weight. It is important to not let the voltage of your battery drop below 9. Doing so may damage the battery and it may be impossible for it to be fully charged again.
Pins and Holds
There are a large number of battery chargers out there. Just make sure it supports LiPo's and the number of cells your battery uses. Some chargers will automatically stop once the battery is fully charged, but it is important to make sure you do not over-charge your battery, which may result in a fire. There are lots of different drive systems in combat robotics. They range from simple 2-wheel drive systems to walkers, to propellers!
In this guide we will focus on two of the most common motors and mounts used in simple wheeled drive systems: Micro gear motors and FingerTech SilverSpark motors. Both of these products are "gearmotors. The gearbox is used to adjust the torque and the speed of the motor's output. The "ratio" of the gearbox determines how the speed and torque will be adjusted. For example, a This makes the motor spin 50x slower, but also provides 50x more torque. So to compare the Many antweights like Dead Air pictured to the right use these micro gearmotors because they are light-weight but still give your bot some great maneuverability.
They are sold by both Pololu and ServoCity , as well as several other websites. They come in a variety of gear-ratios, but we recommend using the You can mount these motors to your bot very easily with the use of Pololu's brackets and choose from a wide selection of wheels on Pololu's website as well. One thing to keep in mind while using these wheels is that the treads can slip off of the hub if pushed sideways too hard.
To remedy this, we recommend gluing your treads on. Another potential issue with the wheels is that as they get larger in diameter, they do not get much thicker. So if you use large, thin wheels make sure they're not exposed! Robot fights take place in a sturdy arena, usually constructed of steel, wood, and bulletproof clear Lexan plastic. The smaller, lighter classes compete in smaller arenas than the heavyweights.
Competition rules set limits on construction features that are too dangerous or which could lead to uninteresting contests. Strict limits are placed on materials and pressures used in pneumatic or hydraulic actuators, and fail-safe systems are required for electronic control circuits. Generally off-limits for use as weapons are nets, liquids, radio jamming, high-voltage electric discharge, untethered projectiles, and usually fire. The Robot Fighting League RFL was created in when several builders decided that robot combat needed standardization of rules and judging criteria.
The majority of robot combat events in the U. The topic of event standardization has lent itself to a healthy amount of controversy since the RFL's inception. An effective combat robot must have some method of damaging or controlling the actions of its opponent while at the same time protecting itself from aggression. The tactics employed by combat robot operators and the robot designs which support those tactics are numerous.
Although some robots have multiple weapons, the more successful competitors concentrate on a single form of attack. This is a list of most of the basic types of weapons. Most robot weaponry falls into one of the following categories:. Many modern rulesets, such as the rebooted versions of BattleBots and Robot Wars , require robots to have an active weapon in order to improve the visual spectacle, thus eliminating certain designs such as torque-reaction axlebots and thwackbots, and requiring other designs such as wedges and rammers to incorporate some other kind of weapon.
It is increasingly common for robots to have interchangeable weaponry or other modular components, allowing them to adapt to a wide range of opponents and increasing their versatility; such robots are often referred to as "Swiss army bots", in reference to Swiss army knives. Arguably the earliest example was Robot Wars Series 1 contestant Plunderbird , which could change between a pneumatic spike and a circular saw on an extendable arm.
Sometimes, robots that were not originally Swiss army bots have had their weapons changed or altered on the fly, typically due to malfunctions. In BattleBots , Ghost Raptor' s spinning bar weapon broke in its first fight; builder Chuck Pitzer then improvised new weapons for each following fight, including a "De-Icer" arm attachment which it used to unbalance and defeat bar spinner Icewave in the quarter-finals.
Since the first robot combat competitions, some types of weapons have been prohibited either because they violated the spirit of the competition or they could not be safely used. Prohibited weapons have generally included:. Individual competitions have made exceptions to the above list. Notably, the Robotica competitions allowed flame weapons and the release of limited quantities of liquids on a case-by-case basis.
Arena hazards have also been granted exceptions to the list of prohibited weapons. Robot Wars in particular used flame devices both in the stationary hazards and on one of the roaming " House Robots ". A very wide variety of unusual weapons and special design approaches have been tried with varying success and several types of weapons would have been tried had they not been prohibited. The great majority of combat robots roll on wheels, which are very effective on the smooth surfaces used for typical robot combat competition. Other propulsion strategies do pop-up with some frequency.
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Robot-sumo is a related sport where robots try to shove each other out of a ring rather than destroy or disable each other. Unlike remote-controlled combat robots, machines in these competitions are often automated. From Wikipedia, the free encyclopedia. Not to be confused with Military robot.