Deadlift - 1.5Kg Beetleweight Combat Robot by Noursicus

Last crawled date: 4 years ago

Say hello to Deadlift, a 270 degree beetleweight lifter bot for the UK!
Features:
Deadlift is built around a highly mobile lifter arm, powered by two servos and capable of up to 3/4 rotation if needed. The lifter arm, once a steel lip has been added, is able to scrape the floor effectively at a shallow angle and can hoist opponents up and away or ontop of the robot. Unlike most lifters, it is also just as effective when inverted! Deadlift also has multiple design considerations to make it more beginner friendly, including supported drive motors, angled rear armour for better deflection and small frontal wheelguards to allow for opponents slipping off. The front wedge, again improved by adding steel, has a relatively aggressive angle to better protect the arm and to keep opponents ahead of the robot rather than to its sides. On top of all this, the bot is printable in three steps, and can be printed on the vast majority of printers including the Ender 3!
The basics:
Deadlift is designed to use standard parts and be a basis for people to work from to create better bots. 3D printed bots are often not very competetive at this class but that doesn't mean they can't still be used! This project contains all the files you need to print a combat ready robot chassis with lifting arm. I HIGHLY recommend however that you add bolt on steel or titanium armour, particularly to the front and the lifter arm, as it will struggle in combat without it. Deadlift, like all my bots, is designed for standard parts and has wiggle room for whatever electronics you want to put in, but I've made some recommendations in the Bill Of Materials below.
Important notes:
There are four versions of this bot: the normal one, normal one with holes, the shortened one and shortened with holes. Cura sometimes will not accept the normal version as fitting inside an Ender 3 bed, but should accept the smaller version without difficultly
This is a unibody bot, it's gonna take a long time to print as a result! I recommend ABS, HIPS, PETG or Nylon materials, in that order
Deadlift's default servos, available off Ebay, are 180 degree servos
The design has been optimised to be a strong as I could make it, but be careful when modifying that some walls are quite thin
There is now allowance for fixtures! The current version is built for 15mm M4 bolts and M4 heatset inserts. I'll add more provision if requested.
Please note that this design will continue to evolve and change as time goes on. A more Ender 3 compatable version is in the works, for example.
BOM:
1x Chassis
1x Lifter arm
1x Lid
2x Motor Mounts (I always recommend you make these from aluminium, ideally 2mm 6061)
2x Tower Pro MG996R servos, available on Ebay. Most 13kg 180` servos will work however
2x 25mm Gearmotor (500-700Rpm is ideal)
2x Drive ESC
1x Radio setup (Tx/Rx)
1x 5mm LED
1x LiPo battery (Recommended 3S, 650MaH, you'll want two though for events)
2x BEC (To power your servos)
12x M4 Heatset brass inserts
12x M4 15mm bolts
Basic build details
The servos mount to the blocks at the front, either side of the lifter. Use their circular horns for the best results
The LED can simply be hot glued into place in the rear mounting hole
The slot in the lid is for an XT60 removable link, though an XT30 works too!
This robot only needs 18-22 AWG wiring
Make sure you use 15mm bolts for the top plate! Any longer and you'll rip out the insert
The front wedge has holes to allow through-bolts rather than inserts to fasten metal plates if you want it. This will be stronger, but would require a separate set of fasteners