HUGElet v1.0

thingiverse

This is a one-pound or antweight fighting robot modeled after the Battlebots competitor "HUGE" from the 2018 Battlebots season. It's designed to be printed on a Markforged Onyx One / Onyx Pro printer, with all parts fitting individually on the bed. Virtually all parts in this design are available off the shelf, but the weapon bar needs to be manufactured using your preferred method (waterjet shop recommended). Additional parts needed include: .375" hollow shafting with .65" wall thickness [weapon shaft] (McMaster part https://www.mcmaster.com/89955k449) .375" ball bearings (x3, weapon hub bearings): (McMaster part 60355K45 https://www.mcmaster.com/60355k45) .375" bore thrust bearing (McMaster part https://www.mcmaster.com/) 2204 brushless outrunner motor (samples with appropriate shaft orientations are here: https://hobbyking.com/en_us/turnigy-2205-34-1500kv-brushless-motor.html and http://www.espritmodel.com/axi-300-2204-54-outrunner-brushless-motor-v2.aspx) DYS 20 amp brushless speed controller (https://www.fingertechrobotics.com/proddetail.php?prod=XSD20A) FrSky XMR receiver (x2, one for each side): https://www.getfpv.com/frsky-xmr-receiver.html (You will need a FrSky radio to use these) ThunderPowerRC 325mah 2S battery (x2, connected in series using wiring run through the center shaft): http://www.thunderpowerrc.com/AIR_BATTERIES/325-mAhR/TP325-2SR70J 1/32" Lexan (NOT acrylic, for top plate) 3mm grade 5 titanium [weapon bar, .dxf provided. I recommend waterjet or plasma cutter. Doing this by hand will suck a lot.] (https://www.fingertechrobotics.com/proddetail.php?prod=titanium) This robot was designed for the Endbots 3D-printable combat robotics contest in October of 2018! If you want to see other entrants and maybe enter yourself (contests happen monthly!), check this link: http://forum.endbots.com/thread/41/endbots-design-contest-october-2018 The approximate cost for this is: FrSky XMR Receiver x2: $23.98 each Fingertech TinyESC x2: $52.50 each Fingertech Mini Power Switch: $15.34 each Fingertech 22-tooth Pulley: $10.30 each Fingertech Silver Spark 33:1 x2: $36.38 each DYS 20a brushless ESC: $23.34 each ServoCity lightweight hubs (x2): $13.98 each ServoCity clamping hubs (x2): $11.98 each Turnigy 2205/34 1500kv motor: $28.94 each ThunderPowerRC 325mah 2S battery x2: $25.98 each McMaster hollow shafting: $9.32 for 12" section McMaster 3/8" ID ball bearings (x3): $19.44 each McMaster 3/8" thrust bearings (x2): $7.58 each McMaster heat-set inserts: $103.10 per pack of 100 3mm titanium plate: $37.75 Assuming you have (or have access to) small quantities of screws, this comes to approximately $470 dollars of hardware plus printing costs and waterjet costs. I recommend piggybacking on someone else's waterjet order or cutting several blades to keep costs per blade reasonable. Consider Big Blue Saw (bigbluesaw.com)! I strongly recommend trying to find somewhere local to you that will sell you high-strength screws of the appropriate sizes in small quantities (join your local makerspace!); however, if you are planning on this being the first of several robots, the McMaster screw quantities will make sense - virtually all of the screws listed in the BOM come in quantities of 100 at minimum (which is why they're all about $15 a pack).