Change to bowden set-up

Because NEMA 17 weights about 300g, the printer head will have an induced momentum, meaning that it would have not handle the high accelerations that I will need in order to print fast. This is why, I decided to go for a bowden setup and replace the old configuration. This is how it looks now:


This is a lighter version that has one fan (in the front) for cooling the cold end and 2 smaller fans that will cool down the hot extruded filament. The latter comes through the white teflon pipe being pushed by a stepper motor:


The parts needed for this conversion can be found here:

In order to push the filament to the hot end, the NEMA motor needs a gear to have grip. I use the MK8 gear and here it is an easy and cheap way to make it.