150g Hammer Battlebot

thingiverse

Hammer Robot. This is a 150g combat robot. I'm attaching the .STEP file as well for those who want to edit. Very simple build that doesn't require many extra tools. Wedges can be printed or cut out of a sturdy material. 0.5mm Titanium is ideal. But Plexi/Acrylic also work as well. If printing scale them in Z to make them thicker Hammer arm should be cut out of material like Aluminum or Steel. Use the print as a template to cut. The lego hub has tolerances to printed easily on my printer and be a snug fit, but attaching a tighter tolerance version incase you need it. You can use #4 Plastite screws for everything (to save on buying parts). But I use #3 for the top armor and top panels and #4s to attach the wedges to the frame Use a #3 drill bit to clear out the holes in the hammer gear and base uprights. BOM: Hardware: 1 qty - M3 x 25mm (https://amzn.to/2KysG1r) 2qty - M3x 10mm 4" Zip Ties (https://amzn.to/2Z6jRA3) 4-20 Plastite Screws (https://amzn.to/2Q5UFWI) 3-24 Plastite Screws (https://amzn.to/2AInL9z) Wheels: Lego 24x14 Tire (https://amzn.to/2yLfDUd) 2.54 Header https://amzn.to/31H02RM Electronics: Flipper Servo: KST X12-508 Servo https://alofthobbies.com/kst-x12-508.html Here are other variations of the servo that will work. KST DS215MG V3, ES9256 HV, KST X12-508, PTK 9495MG-D. These are 2S servos. Power directly from your battery to get the full voltage to them. You also may need to trim the end of the servo arm to get it to fit in the gear. I have also included a servo arm for the cheap HXT-900 servo. Not as quick, but good for messing around the house. (https://amzn.to/2KKKQfl) ESC: Endbots DESC or Budget DESC :https://www.endbots.com/collections/products/products/endbots-desc?variant=5580585992221 Drive Motors: N20 Micro Gearmotor 30:1 or 1000rpm (https://amzn.to/2JsTwpA ) or order alongside the DESC (https://www.endbots.com/collections/motors/products/n20-gearmotor?variant=35202867907) RX: Your choice the Endbots DESC comes with a Spektrum receiver. TX: Your choice. I use a Spektrum DX6 (https://amzn.to/2qk8RQA) Battery: Nano-tech 300mah 2S Lipo Pack (https://hobbyking.com/en_us/turnigy-nano-tech-300mah-2s-45-90c-lipo-pack.html) I use the 4 wide 2.54mm Headers as my link.