Hot swapping is the process of switching  filaments
mid-print to achieve multi-color prints with a single extruder.
Hot swapping is excellent for printing
logos, signage, and decorative widgets.
Hot swapping can be done multiple ways.
In this video, we'll show you three of them,
taking you from digital model to finished multi-color print.
We'll also show you some tips and tricks for achieving  great-looking results.
The Pause at Height method is preferred for
achieving precision, accuracy,  and repeat-ability.
Before beginning it's important to remember that
print settings often vary dramatically between filaments.
For this reason we suggest
using the same polymer and manufacturer for the entirety of the print.
To start, load your model into Cura 2 and
select your desired material settings.
Using the layer view, drag the layer tab to find your desired transition point.
Once you've identified the layer number,
Multiply the layer number by your layer
height found under the quality menu to obtain your pause height.
Under the Extensions tab, navigate to
Post Processing,  Modify G-Code, and select the Pause at Height script.
Enter your desired pause height.
If you're using multiple pause heights be sure to enter them from highest to lowest
Now you are ready to begin printing.
When the print has paused,
gently remove the previous
filament and push in the next filament
until a small amount begins to extrude
from the nozzle.
Gently turn the herringbone gear counter clockwise to
purge the previous filament.
Once this is done hit resume.
If precise layer lines aren't crucial for your print,
you can manually pause the printer
to change filament
without modifying g-code In Cura
While printing, simply select Pause in the menu on a TAZ, or in Cura on a Mini.
Carefully swap out the filament like before...
...and hit resume.
Finally you can hot-swap on the fly by 
chasing one piece
of filament with another of the same polymer.
This works 
especially well on the MOARstruder tool head.
Simply cut the first filament
while printing
and follow it into the hobbing with the second filament
The trick is to apply enough pressure to
force the remaining filament into the
extruder,
but not so much that it causes deflection or skipped steps.
This method can be difficult so we recommend
perfecting the technique before trying
it on larger prints.
As soon as you get the hang of hot swapping and
feel confident cranking out those multicolored designs,
the LulzBot 3D
printer community
would love to see your results.
Share your favorite designs, images, videos, and
3D models and join the
ongoing conversation.
