Articulated Wedge Battlebot Ant Weight Robot

thingiverse

This is a work in progress and subject to revisions. I've created an articulated wedge that operates even when flipped over, working by going under its opponent until one of the screws catches, forcing it to fold in half with the wheels all the way back, causing it to stand on end and flip its opponent. I designed this using Fingertech Silver Spark or Gold Spark motors with bearing block mounts. The bearing blocks fit into recesses on the sides for easier alignment. I recommend utilizing 2.25" Fingertech snap hubs and wheels. I'll be competing at the DARC Robot Rebellion in Richardson, Texas on 3/12/17 with this robot and will upload videos afterwards. With 50% infill, 5 layers top and bottom, and 6 on the sides, this robot has plenty of weight to spare for a 1/16" Lexan top and bottom covers along with a 3S 450mah lipo and 6 channel receiver. Edit: 2-19-17 I noticed some issues while printing which included an off-center wedge mount so I corrected this and uploaded a new file, making it slightly bigger to provide more space between the Fingertech motors. Edit 2-20-17 I enlarged the recess for the bearing blocks by 1mm in width and height to allow for easier fitting. The bearing block should fit nicely into the recess now where it was a very tight fit before. I've added two new files, including a main body that can print without supports, and some wedges without text on them. Here are some links to the parts needed from Fingertech: Silver Spark motors - http://www.fingertechrobotics.com/proddetail.php?prod=ft-Sspark16 Bearing Blocks - http://www.fingertechrobotics.com/proddetail.php?prod=ft-bearing-block Wheels & Hubs - http://www.fingertechrobotics.com/proddetail.php?prod=snap-wheels-hub I use modified VEX 29 motor controllers and a FlySky 6 channel radio set, but you can buy some Tiny ESC's or pick up a small brushed motor controller off of eBay. Edit 3/1/2017 I've added longer wedges with stops on them to keep the opponent from sliding all the way on top of the robot, also forcing the folding under action that tips the other robot over. I used a 10-24 X 3" screw to secure the wedges to the body. You can see in the attached pictures that I used a screw to keep the front of the main body up slightly more than level to aid in the tipping motion as well. Here's a video of the robot being driven on the floor. https://youtu.be/--WZDBqPA64 Print Settings: Printer: Home Built Core-XY Rafts: No Supports: Yes Infill: 50% Notes: I print PLA on my printer at 230C with the bed at 65C.