CE432-1 Robotics II 2021 Fall
Prusa 3D printer setup
Name:
Mychael Garcia
Email: mhgarcia@fortlewis.edu

In this report I will talk about the building process a Prusa i3 MK3S+ 3D printer and calibrating it for ideal print quality.

The kit is contained in a single box, this includes an instruction manual and one spool (1 Kg) of PLA filament. Following the instruction manual on how to build the printer is extremely straight forward, the components need for each step are labeled in their own bags (x-axis, y-axis, z-axis, extruder...). After building and wiring everything up selecting the correct print bed is extremely important, this was learned by multiple failed print attempts. The standard heat bed is a slightly textured steel sheet. This worked well for small prints that took very little time, but if the object took longer than an hour or was tall in the z-axis the piece would come dislodged from the print surface. Using a glue stick to help keep the print fixed to the bed helped a little bit but still did not give enough adhesion for the print to finish without missing up.

When the printer is initially turned on you are greeted with a setup process, this helps with calibrating the z-axis, and home position for the extruder head. Using the built in "z" calibration the extruder nozzle is supposed to be automatically set 0.2 mm away from the print surface, this is the ideal distance for printing. After measuring the "bottom layer test print" the filament was outputting at a higher layer height (0.43 mm). This was fixed by using the "live z adjustment feature." As seen in this image, three attempts were made using the textured steel bed with a layer height of 0.2 mm but none of them completed.
Boat fail

After the failed attempts the bed surface was changed from the steel sheet to a steel sheet lined with PEI. This bed had a smooth texture. On initial impressions this bed was going to give less adhesion to the filament, but it worked much better. After calibrating the extruder due to the change in print bed height and applying a layer of purple glue using an Elmer’s glue stick, the same print file was tested. This worked on the first try.  Compleeted boat

The reason this file was chosen was because it is the standard 3D printer quality test. It has multiple features which are hard for additive 3D printers: overhangs, gradual slopes over multiple layers, layer delamination, webbing caused by the printer moving to different areas to print (starting/stopping filament extrusion), and infill settings. The Prusa did exceptionally well, it had no issues except for some small webbing spots that could be cleaned later.


Conclusion:

The set up and assebly process of this printer are easy to follow. I would recomend this printer to anyone who wants a 3D printer but doesnt want to spend $1,000 or more.
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