Unofficial v2 of Endbots Vector beetleweight (3lb) combat robot
Releasing Numerous Improvements To Endbots Vector With Updated Parts List; Can be Built For Under $500
The Vector is a beetleweight (3lb) combat robot design released 2019.
It was a very popular bot due to readily available kits, parts, and also the design was available on Thingiverse. However, many of the parts are no longer available for sale, we spent over 20 hours just hunting down parts that could work, and the bot has seen few design changes to remain competitive. We learned this first hand in our first competition. We’ve made some key improvements and you can download and sharing our parts list publicly to save you time and money.
Download the revised models on Thingiverse.
Key Improvements
Strengthened corners in metal to limit bending. We found the corners just above the motor mounts was a weak point and bent in multiple battles and once caused us a knockout.
Reworked motor mount to accept Just ‘Cuz motors. The motors from the original design are no longer available and Just ‘Cuz are of high quality.
Change the metal plate guarding wheels to a 3d printed “bumper” that wraps further around the bot offering superior protection. We found the metal plate to be a liability, with any hits on the metal plate causes the plate to bend on the motor axel, seizing that wheel. The bumper also wraps further around offering protection to more of the bot.
Lightened weapon to save weight for strengthen bot. The old weapon weighs in at about 315 grams. The revised model takes some weight from near the hub and reduces weight to a more manageable 260 grams. This was needed to allow for the heavier drive motors, thicker top and bottom plates, and the added weight of the bumpers.
The bot weights in at 2.904lbs.
Download the revised models on Thingiverse.
Parts List
These are the parts we used. I’m sure there are better or cheaper or newer parts available. Be aware sometimes parts that worked for me might not work for you.
Drive motors: Just ‘Cuz Dartbox Vipers ($70 for 2)
ESC: FPVKing ($16)
Weapon motor: SunnySky X2212 KV980 ($16)
Weapon ESC: EMAX D-SHOT Bullet Series 30A ($35)
Battery: OVONIC 3S Lipo Battery 80C 450mAh 11.1V ($48 for 4)
Wheel Hubs: FingerTech Twist Hubs Wide (pair) 4mm x 0.75” ($20)
Wheels: FingerTech Foam Wheels WIDE (pair), 2.00” x 0.75 ($4)
Switch: FingerTech Mini Power Switch ($9)
Top & Bottoms: 7075 T6 Aluminum (.125”) ($128 via SendCutSend for 2 of each)
Weapon: AR500 Steel (.187”) ($35 via SendCutSend for 2)
Filament: TPU (~$5 including spares)
Standoffs: PATIKIL M3 Hex Nuts x2 ($18 for 12)
Belt: BESTORQ 180-XL-025 Trapezoidal Timing Belt, 18” Outside Circumference x 0.25” Width x 0.09” Height, 0.2” Pitch, 90 Teeth ($22 for 5)
Needle roller for weapon: uxcell RCB121616 3/4” Bore 1” OD 1” Width ($15 for 2)
Weapon Standoff: 5/16”-18 Thrd Sz, 1 in Bd L, 3/4 in OD ($6)
Misc screws, bolts, etc: $10
= $457 + transmitter & receiver and spares
Please build at your own risk. We are not responsible for accidents or injuries, nor are we to be held responsible for any issues you might have, parts you might buy that no longer work with other parts, etc.