Modular Robotic Arm, Hinge Joint, No Hardware

thingiverse

HEY - This thing just isn't working right!\nCheck out the updated design!\nhttps://www.thingiverse.com/thing:2335158\nhttps://youtu.be/8H3fbxzmF9w\nUpdates -\n4/27/17- Created another compatible gearbox for this (66.46 : 1)\n2/12/17 - Added holes in top half of joint to access screws easily.\n2/13/17 - Added flat spot to top half of joint for better bed adhesion\n3/4/16- Designed a EZ Print Version\nWhere's Everything Else???\nhttps://www.thingiverse.com/Gear_Down_For_What/collections/robotic-arm\nIn This Collection you will find:\nAll other related parts for this project\nFuture Updates to this Project\nAll User Submitted Remix's\nClick that watch button to get notifications on future uploads!\nThe Gearbox(s):\nfor use with this joint are different "thing's" located in the robot collection above\nThese gearboxes are absolutely necessary for this joint because they not only drive the joint but also work off the concept of Emmets "Gear Bearing" and provide a bearing for the hinge joint, use the "one piece sun gear" and the "4 Module planet gears". Also, print the #2(or #4) sun gear and use that in the 4th module.\nRunning the gearbox without it pressed into the arm is a good way to wear it in so it doesn't rob torque from your stepper, but it can also take the planet gears out of alignment if the rings open up and skip a gear. if the gears aren't arranged as pictured above the gearbox will wear itself out rather quickly.\nBendy Bend Bend:\nThis arm rotates 230 degrees before colliding with itself in the cad program but it is actually more like 229 degrees real life.\nI designed the gearbox with an optional 4th ring and longer planet gears to accommodate that, if you would like to use that setup (you should) you will also need to print out the Optional Side Bearing.STL file. The Side Bearing holder is pressed in place and secured with 1.75 filament though the hole. This setup should give the joint more support against side to side play and should also reduce backlash.\nDual Motors:\nThere I also a mount to attach a second NEMA 17 motor, so you can drive the gearbox from both ends, it is attached with a press fit and held in place with 1.75 filament pressed through the holes. This setup also significantly reduces backlash and side to side play as the gearbox actually uses the stepper motor shaft as a support, thus supporting the joint.\nOther Important Info:\nCAD Files??\nMessage me.\nShow Your Work!\nMake a "make" and show everyone what you made! (make? :0) Everyone will thank you for it!\nFor More Cool Projects and Upgrades, Don't forget to Follow Me on Thingiverse and Subscribe to my Youtube Channel\n Gear Down For What? \nPrint Settings\nPrinter Brand: Prusa\nRafts: No\nSupports: Yes\nResolution: .25\nInfill: 10 - 50%\nNotes: I printed this on my Anet A8\nYou need to print these parts so the rings are flat on the build plate, it is so much stronger that way, i attempted printing it upright and the ring cracked while inserting the gears.\ni had trouble with the rings getting messy until i set support top distance to 0