Servo driven tracked rover w/suspensions (self tightning belts).

thingiverse

3D Printed Tracked Rover from Lynlim Nesneros on Vimeo. There are meant to be glued on some rubber squares at the flat side of the tracks. You Need: * Filament * Glue * Self-tapping screws with a wide head * M5 screws (do not use any countersink screws on this project) * Bearings 16x 5x10x4 MR105ZZ * 2 standard size servo w/mod for continuous rotation (I used Towerpro 966MG) Start by fastening the front to the middle part, using 2 self-tapping screws and glue. Fasten the servo with a servohorn tap heading forward. Screw in the back parts through the hole in part. Center and fasten the servohorn to gear, fasten gear to servo. Screw on side skirts. Use 3mm filament, burn the end, and stump them flat. Do this at both sides, making it tight. Assembly bearings to back part, suspension pins, and wheels. Sand suspension pins to fit the chassis, they have to turn pretty free. Use grease. Secure the back suspension pin with a wide head screw. Fasten wheels to suspension pins. Fasten back wheel (all wheels are assembled bearing turning out). Set in the springs, easiest if you set it in the chassis first. Assemble belt, use the filament trick. 33 tracks per belt. You can change belt tension by changing wheels to smaller or bigger ones (depending on what springs you have). Assembly the last track when belt is stretched on place, and last chain over the gear, makes it easier. Ready to connect to RC, Arduino, or whatever you like :) Print Settings: * Printer Brand: Ultimaker * Printer: Ultimaker Original * Rafts: No * Supports: No * Resolution: 0.2 * Infill: 25 Notes: You may have to rotate some of the STL's How I Designed This: Instructables: http://www.instructables.com/id/Servo-Driven-Tracked-Rover-Wsuspensions-self-Tight/ You need 16 bearings MR105zz 5x10x4mm http://www.ebay.com/itm/10PCS-5x10x4mm-Miniature-Bearing-For-Toy-Car-Hobby-Kit-(10-Pack)/232150964115?hash=item360e2fe6bf:g:Kw8AAOSwiFJYzQ7v 2 standard size servo http://www.ebay.com/itm/MG996R-Metal-Gears-Digital-Servo-For-Toy-Car-Hobby-Kits-(1-Pack)/232149876514?hash=item360e2fe5a4:g:WZoAAOSw9pJYzQ7v 6 M5x25 http://www.ebay.com/itm/10x-Durable-M5-Titanium-Double-Sided-Studs-(M5-25mm)/232149876514?hash=item360e2fe5a4:g:WZoAAOSw9pJYzQ7v 2 self-tapping screws with wide head M4, 2x25 http://www.ebay.com/itm/M4-2-Phillips-Truss-Head-Wide-Flat-Self-Tapping-Screw-for-PVC-Conduit-(10-Pack)/232149876514?hash=item360e2fe5a4:g:WZoAAOSw9pJYzQ7v 2 self-tapping screws Phillips M4, 2x13 http://www.ebay.com/itm/4-2mmx13mm-Thread-8-Phillips-Truss-Head-Self-Tapping-Screw-for-PVC-Conduit-(10-Pack)/232149876514?hash=item360e2fe5a4:g:WZoAAOSw9pJYzQ7v For the self-tapping screws, you can use screws for wood or plastic. They do not need to be exact the length I linked to; those are just the length I used :)