![]() The main body is made from wood, and there are a ton of 3D-printed details that make it look fantastically accurate. We have to wonder if it is technically bigger than the six-shooter, because they seem to be roughly the same scale, except that chose a much bigger model to start from. (Video, embedded below.) The Guinness people haven’t shown up yet to award, but at 12.5 feet, this baby is over twice as long as the current record holder, which belongs to former NASA mechanical engineer Mark Rober and his now-puny six-foot six-shooter. Well, here it is: a shoe-in for the new world’s largest NERF gun. We recently saw another 6-DOF actuator design, using flexures, yet another ball-balancing hack, but if you want an actually useful Stewart platform application, checkout this pool-playing robot!Ĭontinue reading “An Interesting Circular Stewart Platform” → Posted in Misc Hacks Tagged 6-DOF, arduino pro mini, h-bridge, Stewart platform, tb6612 Obviously, the sketch running on the Arduino will give the thing a fixed motion, but add in an additional data link over that central slip-ring setup (or maybe a wireless link), and it will be much more useful. Control is courtesy of an Arduino Pro Mini, which drives the motors using a handful of Pololu TB6612 (PDF) dual H-bridge driver modules. One interesting deviation from the usual Stewart platform arrangement is the use of a central slip-ring connector to provide power, allowing the whole assembly to rotate continuously, in addition to the usual six degrees of freedom the mechanism allows. This circular arrangement is so simple that we can’t believe we haven’t come across it before. With the addition of the usual six linkages, twelve ball joints, and a few brackets, a complete platform is realised. The common end of each arm rides on the central shaft, each with its own bearing. This is a very neat mechanism comprised of six geared motors on the end of arms, engaging with a large internal gear. ![]() Anyway, here’s an interesting implementation from the the curiously named YouTube channel (no, we can’t find the designer’s actual name) with a series of videos from a few years ago, showing the construction and operation of such a beast. Local Shop in Parit Raja, Batu Pahat, Johor.Stewart platforms are pretty neat, and not seen in the wild all that often, perhaps because there aren’t a vast number of hacker-friendly applications that need quite this many degrees of freedom within such a restricted movement range.How to Upload Program or Code into Arduino Pro Mini by Using CH340 UART Serial Converter Cable.How to Program Arduino Pro Mini 328P by Using Arduino Uno.upport external 3.3V~12V DC power supply.Using Atmel Atmega328P-AU microcontroller.1 pair of TTL level serial port transceiver port RX/TX.14 digital input/output ports RX, TX, D2~D13,.One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz. The pin layout is compatible with the Arduino Mini. There are two version of the Pro Mini. The board comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires. The Arduino Pro Mini is intended for semi-permanent installation in objects or exhibitions. A six pin header can be connected to an FTDI cable or Sparkfun breakout board to provide USB power and communication to the board. The Arduino Pro Mini is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers.
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