Coal Wagon

Purpose
Coal wagon is used to carry batteries. It supplies electrical energy to the locomotive and other wagons through magnetic connectors.

Battery cradle
The battery cradle is printed rather than relying on commercial prebuilt ones. You can probably find a commercially available one that can fit into the wagon if you don't want to go through the process of making the one from this set. In this set, cradle body is printed with a printer.

Wheels
It has four wheels (one set of wagon wheels) which rotate in a carriage to follow the shape of the track. These wheels are universal throughout all of the wagons.

Connectors
The two connectors are magnetic and they transfer electricity. Magnets are 6mm x 3mm neodymium magnets, also widely available in the market. Connectors are assembled with or without super glue. Once assembled and mounted connectors are extremely easy to use since they snap-on to one another. The direction of the two magnets in each connector will not allow accidental inverse polarity. If you do make a mistake of inverse polarity while assembling or mounting connectors, the voltage is very low and the components can handle inverted voltage.
DO NOT SHORT CIRCUIT THE CONNECTOR!
Think about the environment
I have done my best to design this wagon in such a way that it can be easily repaired and if really necessary salvaged. It is both sturdy but doesn't use too much plastic. So be responsible to the environment if things go wrong and try to reuse or repair whatever you can. Make it a challenge rather than nuance :)
Build instructions
Building the wagon involves printing and cleaning parts, wiring and asswmbly.
Instructional videos will show a recommendation for slicing parts. But you can also find a better way while you build your own.
If you have never worked with soldering, there are great videos on YouTube to show you the basics. That should be just enough to acquire a skill to get this done.
There are also dedicated videos to wiring here so you should be covered.
For a full reference of necessary materials and tools, go to Tools & Materials.
Chasis
Files
Part list
- 1 x chasis
- 1 x lid
Important notes
- PLA recommended
- do not place more supports than necessary
- no brim

Battery cradle
Files
Part list
- 1 x battery-cradle
Important notes
- PETG recommended
- do not place more supports than necessary
- it is best to use tree support

General parts
Files
Part list
- 4 x bumper-cap
- 2 x connector-body
- 2 x connector-cap
- 4 x wagon-wheel
- 1 x wagon-wheel-base
- 1 x wagon-wheel-carrier
Important notes
- PETG recommended
- pay attention that all parts are perfectly level with the print bed while slicing
- you don't have to print all general parts at once
- connector body should be placed on the side
- avoid brim
- supports only on connectors

Axiles
Files
Part list
- 2 x wagon-wheel-axile
- 2 x wagon-wheel-axile-sleve
Important notes
- PETG recommended
- no supports
- with brim

Assembly




