Building for the Plastic Antweight division begins with 3d printing your custom design!

Using your custom printed parts with some OEM electronics, like motors ESCs, servos, and switches, this is where ideas come to life

Oregon State Combat Robotics members have access to 3d printers and club supplies, including OEM parts. Depending on your custom design, your part requirements will vary.

Building a Combat Robot

After designing your ultimate combat robot, the next step is printing the parts. In order to do this, a program like Ultimaker's Cura or PrusaSlicer slices the design into layers, and routes, for the 3d printer to follow.

Within the slicer are several settings available to maximize the strength to weight of the individual part. The number of walls, density of infill, and infill shape are the most common. The more walls, higher percentage infill density, and more complex infill shape, all increase both strength and weight.

  • For body pieces and internal parts, three walls and 20% infill with a cubic pattern is adequate
  • For weapon pieces and armor, five to ten walls and 50%-100% with a honeycomb pattern is necessary

Combat robots typically fall into one of three categories that help outline their parts requirements:

  • Inactive weapons, such as Rammers, Wedges, and Thwakbots
  • Active weapons with continuous movement, such as Horizontal Spinners and Vertical Spinners
  • Active weapons with limited movement, such as Lifters and Flippers
  • Some bot designs combine both limited and continuous movement, such as a Hammersaw which has a spinning mass on an extending arm

In an effort to provide the best experience, all club sponsored bots are all powered and controlled by the same 3s LiPo 450 mAh battery packs, dual-speed controllers, AHFDS radio protocol. Other electronics setups are noted here:


Bot Type Drive Motors Weapon Motor Weapon Controller
Wedge / Pusher / Rammer 16mm Silver Spark none none
Spinner (horizontal or vertical) n20 gearmotor 600 rpm 2830 brushless motor 30 amp BESC
Lifter / Grabber n20 gearmotor 600 rpm 20 kg digital servo 6v UBEC

OSCR is working with some of the leading retailers of robot parts to provide the best experience for members, and looks to secure sponsorship this year!

These are OSCR's recommended vendors: