Most of the steps in this latter phase are pretty easy. MakerGear thankfully preassembled the extruder head, so all we really need to do is mount it, its motor, and the cooling fan. MakerGear even includes an extra fan, which we assume you're supposed to use if you buy a second, larger gauge extruder.
Again, this part was pretty simple. Pop the motor in the plastic collar we installed yesterday, mount the extruder on the motor, then mount the fan on the extruder. All you really need to do mechanically on this step is drive a few screws.
The first layer of the build surface sits on top of the springs, and the whole setup is anchored to the lower plate with screws. By adjusting the screws, which run through the springs, you can level the build platform in relation to the extruder head.
Once we leveled the base plate, we add the heating element simply by resting it on top. The heat helps keep the melted plastic from forming up too quickly, which would lead to shrinking and eventually an uneven print.
Binder clip time. They might look jury-rigged, but they actually seem like the perfect tool for the job. The print will ultimately rest on this upper plate, but to ease project removal and cleaning, it's better to be able to take the plate off easily. The clips also help sandwich the plates and the heat element together.
The parts for this step include a basic circuit board assembly, a wooden mounting plate, and few assorted pieces of hardware. When the rig is all done, we will connect it to a PC via the included USB cable.
The zip ties bind the circuit board to the wooden mounting plate, which itself is screwed into the wooden printer frame. The zip ties are a simple, effective solution. They also don't conduct electricity.