FatKame

thingiverse

Hello! This is a larger body for the Kame. It's still a work in progress, but it should be okay as a starting point for others. It allows you to integrate an 800mAh 2s Lipo battery, a strong 6A BEC, a pin header or small prototype board and an ultrasonic sensor. There is a hole at the back where you can install an on/off switch and a battery chute for easy access to the battery. Customization options are available. The servo holes fit my generic cheap 12g metal gear servos, but you can adjust them in the OpenSCAD file to suit your needs. However, it's recommended to use tough servos as they will be under direct load all the time in this design. The software is still being developed, and we're trying to make use of the ultrasonic sensor. The source code can be found in the GitHub repository, which is a fork of the miniKame repository: https://github.com/Blomdoft/fatKame So far, the idea is to have this little web server issue commands to the bot and work fine. I'm using a NodeMCU Amica Development Board, which basically is an ESP8266-12 with a full pinout board underneath it. There are many like these and they're inexpensive. Using the sensor with the ESP8266 boards can be quite tedious due to their limited GPIO pins. However, additional GPIO can be used for sending out data if no interrupt is required. Receiving back the echo requires freeing up GPIO9 or GPIO10, which means making modifications to the way that the flash chip on the board is wired. Think soldering SMD. Here's the servo mapping: board_pins[0] = D1; // front left inner board_pins[1] = D4; // front right inner board_pins[2] = D8; // front left outer board_pins[3] = D6; // front right outer board_pins[4] = D7; // back left inner board_pins[5] = D5; // back right inner board_pins[6] = D2; // back left outer board_pins[7] = D3; // back right outer Thank you! I'd like to extend my gratitude to bqLabs, this is a really nice bot. Print settings: Printer Brand: RepRap Printer: Prusa i3 Rafts: No Supports: Yes Resolution: 0.2 Infill: 15% Notes: The upper part can be a bit ugly to print. I'm printing it in natural direction with a lot of support, and the bad surface finish doesn't matter much since it's on the inside. I took the FreeCAD file from the Kame, failed to modify it, and made a new one in OpenSCAD. My OpenSCAD skills are still not great, so the file is definitely not nice.