Hectorrail 141 Wifi remix locomotive for OS railway

thingiverse

This is a remix of Depronized's Hectorrail 141 engine. These parts are all printed in ABS, but I encountered issues getting some parts together due to it being too tight. This might be due to differences in materials or printers themselves. First, read and fully understand Depronized's system, then if you experience printing issues with some parts, mine might fit better for you. This is a work-in-progress model. I plan to add cooling to the motor as it heats up after use. Also, I intend to edit the roof for ventilation and because it fits tightly for me as is. I powered everything from one source by running a 3s lipo battery to the motor driver and using a buck converter to regulate the voltage down to 5V for the NodeMCU. For the original locomotive, visit https://www.thingiverse.com/thing:2575667 My Parts: * The motor mount is designed for linked motors with a shorter shaft than Maxon motors. You'll need this mount as it allows the motor to sit lower in place. I may edit it further but it's working well so far. * For the boogie, I increased room for bearings since Depronized's version had issues with tight fit and poor bearing performance. This is simply a modified version of his design with more space for the bearings to fit properly. * The two gears (10 teeth and 14 teeth) are Depronized's upgraded gears but I've made them slightly larger to ensure perfect fit on the shaft without needing to drill out the centers. * A special 10-tooth motor gear will be uploaded in a few days as I wanted it to lock onto the flat part of the motor drive shaft for better performance. * Chassis offset is due to Depronized's original frame design having one circular offset under the chassis missing, which keeps the boogie's at correct height. Wiring: If you're interested, I'll provide details on how everything was wired. Mostly, follow Depronized's diagram and figure out how to run it from two sources. Hardware: * 1x NodeMCU ESP12E board * 1x Sparkfun motor driver - dual TB6612FNG (1a) * DC voltage regulator (buck converter) to get the 3S lipo from 12v down to something the NodeMCU can handle. I used a DROK LM2596 but wouldn't recommend it due to its size. * 1x 3s Lipo battery. I'm running a 1000mAh battery with an XT30 connector. You don't really need an XT30, just make sure the battery fits in the space under the chassis. * 8x 3x6x2.5mm bearings * 3mm carbon rod for wheel shafts (available on Ebay or Amazon) * 16mm DC-motor and gearbox. Look at Depronized's page and comments for more information regarding motors. * M2 screws for assembling the body, chassis, etc (various length) * M3 screws to assemble the boogie, connect the boogie to the chassis, and the coupler * O-rings for the wheels so they roll quieter and grip better * 3mm LEDs and resistors * I used silicone wire as it's more flexible and easier to work with for this project. Watch a video of this train in action at https://youtu.be/_-fC2sBBlyw