Motorization of the 1/32 OpenRailway EMD SW1500

thingiverse

This is a gearbox designed to motorize Daniel's remarkable EMS SW1500 locomotive (https://www.thingiverse.com/thing:916416). A low RPM 580 motor powers it, with all axles and shafts mounted on ball bearings for smooth operation. Motorizing both trucks increases torque and improves overall performance. Printer Settings: Printer: Vertex K8400 Rafts: No rafts are used. Supports: None required. Resolution: Both 0.1 mm and 0.2 mm resolutions are utilized. Infill: A moderate infill of 35% is employed. Notes: The entire gearbox is printed in ABS plastic. The frame and cover are printed with a 0.2 mm layer height, while the gears require a more precise 0.1 mm layer height. Post-Printing Modifications: The truck incorporates six ball bearings (3x7x3 mm) and three steel axles (57 mm long each). A central shaft is used, measuring 70 mm in length. The gears feature a back slot to accommodate an M3 nut, securing them to the shafts with an M3 grub screw. For optimal performance, it's recommended to smooth the gear teeth with a triangular file. Motor Installation: The motor fits snugly into the truck turret, facilitated by minimal filing or sanding as needed. Update 2017-12-06: To prevent wheel slippage on the axles, a flat surface is filed at the end of each axle, and wheels with a half-moon opening are used. These modifications have been added to the files for future reference.