The Twoup 3D Printer

I don't recommend this printer for a very large number of reasons,
note the jury rigged pulley system, for example, used to maintain z-axis
level, still not adequate but OK for experimenting and for making self upgrades.

The Process
Step1- Lay out 3D structure inTinkercad, Autocad 123, etc.
(did not come with printer)

Step2- Import STL file into printer software or Slicer
In this case Repetier Software
(did not come with printer)

Step3- Slice, convert the structure into a series of G-code moves

Typical g-code file

Step 4: Simulate the cut and examine the display:
Here is a different part that actually printed quite well.

Step 5: Move the print head to the bed. Extrude a bit of plastic to prime the extruder.
Begin the extrusion. Note the display sim shows the stack is too too hot.
This is confirmed by the next picture which shows whiskers and stack shifts.

Here is the printed part, whiskers, stack shifts and all.
Next to it, on the right, is the second part of this construct made in a separate print,
note no whiskers or stack shifts on that part! Yea!!! Compare the finished product on the right
to the original model in tinkercad. The nozzle here is 0.4 mm wide and each layer is 0.2 mm
thick. Not shown here is the fan which I taped down to the bed and
removed before taking the picture.