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Technical data

This page describes all the inner workings of the Team Hell robots, and some helping hints for the budding roboteer.

Hell's Angel's control system:

This is a circuit diagram of Hell's Angels operating system. This diagram shows possible positions of fuses, which are in place to avoid the speed controllers getting burnt out. the fuse bank nearest to the batteries is there to save the batteries AND NOTHING ELSE, the fuses by the motors save the speed controllers.

davewestoncircuit.jpg

OVER VOLTING A ROBOT:

Over-volting a motor will give a robot more speed and power than the motor will on its recomended voltage, however, the motors/servos will get very hot if run for a long time, but since fights only last 3 mins, they should be ok, but don't over-do it. There are some incidences where a higher voltage is required on one system but not on another, such as weapons systems and drive systems. DBA, the AWS 18 champion, uses a voltage regulator that supplied the drive with 6v, the weapon with 11v, and the receiver with 5v, thereby getting maximum power where they want it most.

Lithium Polymer Batteries
 
Lithium Polymer batteries, or 'Lipo's' are in common use in antweights because they can deliver a great deal of voltage at about a 5th of the weight of a Nickle Metal Hydride (NiMh) battery of the same voltage. F.I.N's battery used to be a NiMH weighing 25g, but his new Li-Po weights in at a measly 5g, but still delivers 6v of power. Li-Po's require special chargers that need a 12v supply, not a mains voltage supply (220v). Below is a picture of a Li-po battery. Links to where to purchase these are in the links section of this website

lipo-battery.gif

F.I.N's drive servos:

F.I.N's drive servos have to be fast in order to make its weapon effective. F.I.N's servos are Naro HP/BB 9g servos, but these servos are not speed modified in the conventional way with glue, but with a CNC'd polycarbonate part that slots into the gear train and into the output gear, producing a lot of speed. Below is a set of pictures showing how F.I.N's drive servos are modified, click for bigger picture.

guidetousingcncmod.jpg

VOLTAGE REGULATORS:
 
Voltage regulators are used in antweight robots to allow higher voltage to go to a weapons system and a lower voltage go to the drive system, to avoid the drive system becoming overvolted and therefore getting overheated and burning out. Below is a diagram of how a voltage regulator is set up to allow this to happen, and further down is a picture of the voltage regulator used in F.I.N to allow power from the 7.4v Li-Po battery to come down to 6v:

overvolting2.gif

Ni-Cad's and Ni-MH batteries:

Ni-Cad's (Nickle-Cadium) and Ni-MH's (Nickle Metal Hydride) are the best battery choice for featherweight and heavyweight application in terms of power to weight, but care must be taken with them. For example, when the batteries have been in a fight, they must be first discharged and then charged, and with certin chargeres this can be set so that it switches over modes automatically. When you first get the batteries, they must be charged for a long time and at a certian amp rating, both of which are stated on the batteries (Click above picture to see). After this initial charge, batteries can be charged at different amp rating and for different times, depending on circumstance.

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