N Scale Model Train Intermodal Flatcar Freight with Magnetic Loads Micro-Trains Couplers

Here is my first 3D printed flatcar for N Scale model train layouts. The car uses two 6x2mm round magnets, one in each end. Each 20' cargo load has a single magnet inside, while the 40' loads have two magnets each. The cars use Micro-Trains medium shank couplers and are printed on a FDM 3D printer. Currently using a Creality CR10 V3 printer. There is a short video about the Flatcar and printing process here: https://youtu.be/BYTNTguXe2M

Included are three versions of both the 20' and 40' Intermodal Cargo containers freight loads. I find the minor differences in the versions break up the trains and adds interesting visual realism. Each 20' load has a single magnet inside and the 40' have two magnets. These cars are designed to use Micro-Trains Medium Shank couplers. Here is a small video on how to install the couplers. https://youtu.be/iG7RecpV6t0

To print the Intermodal Flatcar you must use a pause command which is inserted into the slicer program to cause the extruder to move to the side pausing the print and allowing access to the print so as to add the magnets. Make sure you always use the same orientation by first putting the new magnet on another finished part like the same thing you are printing. i.e. use a load for loads and a car for cars as the polarity and orientation will be reversed depending on which you are printing. If you flip a magnet, you can destroy the print with pliers to recover the magnet if you put it in upside down, just don't destroy the magnet.

Pause Commands for S3D slicer can be added to the Scripts tab under Post Processing add:

{REPLACE "\nM117 Layer XXX, Z=" "\nM300 S2000 P80\nG1 X10 Y55 Z25\nM300 S2000 P100\nM0\nM117 Layer XXX, Z="}; pause at layer, move head, play sound

Just replace both of the XXX's with the layer number when the magnet open space first gets covered. You can find this by raising the slicer layer until the space gets bridged i.e. layer 9 the space gets printed over, you would then replace both of the XXX's with a 9.

This will move the extruder to the side and beep alerting you to the pause. Add the magnet (Use another load or car to orientate it) and hit the button on the controller again. This is specifically for the Creality CR10 V3 printer.