3D-printable High torque servo/gear reduction

thingiverse

I've created a Universal Motion Controller to control the position on this servo. More info can be found here: https://www.thingiverse.com/thing:4245315 This servo/gear reduction uses mostly 3D-printed parts. The servo uses a 775 36V 9000rpm brushed DC-motor wich is driven by a BTS7960B motor driver wich is controlled by an arduino mega 2560. The stall torque of the servo is about 55kg/cm wich is about 5.39 Nm. the peak current is about 18 amps when using a 6s LIPO battery (about 22-24V). the reduction ratio is 1:30. I originally wanted to use some 20mm ball bearings for the outputshaft but they didn't arrive in time so I ended up using two 20mm holes and a lot of lubrication. For the intend of filming the internals of the servo for possible faillures, I printed some collored gears and lasercut a 5 mm acrylic lid. Unfortunatly I didn't get to film any awsome footage of gears exploding because they were far to strong ;-). Even at a peak torque of 54kg/cm they didn't show the slightest form of flexing or cracks. The two middle gears (blue and red one) use a stainless steel shaft of 6mm diameter. The holes of the gears are designed at 6.2mm diameter so they would fit nicely around the 6mm shaft but some additional filing/sanding might be required. The same might has to be done for the 20mm shaft holes. I uploaded the dxf of the lid so people with a laser cutter can cut the lid out of transparant acrylic. Video can be found here: https://www.youtube.com/watch?v=8sq4pHdSXYM More info can be found here: https://hackaday.io/project/162855-3d-printable-high-torque-servogear-reduction Components used: 1 × 775 Motor DC 12V-36V 3500-9000RPM Motor Large Torque High Power Motor link: https://www.banggood.com/775-Gear-Motor-DC-12V-36V-3500-9000RPM-Motor-Large-Torque-High-power-Motor-p-1091058.html?rmmds=search&cur_warehouse=CN 1 × Arduino nano V3 link: https://www.banggood.com/Geekcreit-ATmega328P-Nano-V3-Module-Improved-Version-With-USB-Cable-Development-Board-For-Arduino-p-933647.html?p=E01411629100201406T1&custlinkid=255135 1 × L298N motor driver link: https://www.banggood.com/Wholesale-Dual-H-Bridge-DC-Stepper-Motor-Drive-Controller-Board-Module-Arduino-L298N-p-42826.html?p=E01411629100201406T1&custlinkid=255131 1 × Heat shrinks link: https://www.banggood.com/328pcs-Heat-Shrink-Tubing-Insulation-Electrical-Shrinkable-Tube-Sleeve-Cable-21-p-1362019.html?p=E01411629100201406T1&custlinkid=669227 2 × stainless steel shaft dimensions: 6mm diameter, 70mm lenght 2 × M5 bolt and nut dimension: 40mm lenght 1 × 20mm steel tube dimension: 125mm lenght 2 × screws 15mm lenght dimension: 4.5mm diameter, 15mm lenght 5 × screws 35mm lenght dimension: 4.5mm diameter, 35mm lenght Recommended Tools: 3D-printer: https://www.banggood.com/Creality-3D-Ender-3-Pro-V-slot-Prusa-I3-DIY-3D-Printer-Kit-p-1346320.html?p=E01411629100201406T1&custlinkid=677427 <h4>All my project files, instructions, schematics, are provided for free so everyone around the world can enjoy them. Feel free to support me so I can create and share even more awsome projects. Any amount of support is greatly appreciated :-) <a href="https://paypal.me/BrianBrocken">paypal.me/BrianBrocken</a></h4> Feel free to take a look at my other designs: UMC - Universal motion controller: https://www.thingiverse.com/thing:4245315 3D-printable Davinci catapult gift card: https://www.thingiverse.com/thing:4067668 Arduino controlled photogrammetry 3D-scanner: https://www.thingiverse.com/thing:3958326 Fully 3D-printable turntable: https://www.thingiverse.com/thing:3723618 RC FPV tank rover: https://www.thingiverse.com/thing:3587738 Fully 3D-printable wind-up car gift card: https://www.thingiverse.com/thing:3308710 3D-printable High torque servo/gear reduction: https://www.thingiverse.com/thing:3292860 'BOOM box' high voltage capacitor bank case: https://www.thingiverse.com/thing:2980012 Subby the interactive youtube subscriber robot: https://www.thingiverse.com/thing:2928254 robot hand || bionic hand prosthesis prototype: https://www.thingiverse.com/thing:2838239 3D-printable linear actuator: https://www.thingiverse.com/thing:2783959 Mini 3D-printable crossbow: https://www.thingiverse.com/thing:2710472 8 legged spider robot: https://www.thingiverse.com/thing:2470882 best 3D-printable bearing: https://www.thingiverse.com/thing:2349065 Have a nice day!