• Test the design rules for your printer(s)
  • Design and 3D print an object (small, few cm3, limited by printer time) that could not be made subtractively
  • 3D scan an object (and optionally print it)

Group assignment

Testing print quality

To start, I chose to compare the print quality of the FLASHFORGE GUIDER 2 vs. BCN SIGMA 3D printer


This is the BCN SIGMA 3D printer

First, we did the tests in a group, for this we received a class how to use the printer by the instructor of this assignment.

In the case of FLASHFORGE GUIDER 2, it has a surface of build tape , you can see in this image.

In the case of the BCN SIGMA 3D printer, this has a glass surface, which is cast “lacquer” to fix the printed design to the surface.

Click here for bullet the files to the testing

  • Thingiverse
  • We opened the software of printer

    • I chose the option to print and then the type of machine, in this case is FlashForge Guider II

    • I selected the material, which I worked with PLA and in type of quality was Standard.
    • Layer was 0.18 mm
    • Extruder temperature was 195 ° C
    • Temperature of the bed was 45 ° C

    • In this image it is seen that I did not put adhesion to the base and infill I put 20%, I did not use support.

    • The printing time was 4 hours with 6 minutes.

    • I chose the BCN3D Sigma printer

    • It can be seen that the object was stuck to the bed.
    • The material was white PLA
    • Hotend was 0.4 mm brass
    • Profile was of standard quality 0.15 mm
    • Layer Height was 0.18 mm
    • Infill was 20%
    • Extruder temperature was 195 ° C
    • Temperature of the bed was 45 ° C
    • I did not use adhesion or support
    • Dual extruder I put no, because I only work with an extruder

    • The printing time was 5 hours with 32 minutes.

    Finally, we send to print a design to see the qualities of the printer.

    As you can see, the design printed by the FLASHFORGE GUIDER 2,It has a better finish in small details, like letters, is of more rustic finish.

    BCN SIGMA 3D PRINTER is of better quality, creates the layers better, and has a better surface finish.


    Individual assignment - 3D print

    For this assignment,Designed and made your object and explained why it could not be made subtractively.

    I decided to design a toy for my younger sister,

    I designed in Autodesk Inventor

    First I sized a square

    I applied the extrude option

    I drilled the 4 lateral faces of square.

    I made a diagonal section of the cube so that with the revolve option I got a cavity of circumference inside the cube and thus I achieved a vacuum.

    I opened the printer software “BCN3D CURA” then open the file.

    • The material was yellow PLA
    • Hotend was 0.4 mm brass
    • Profile was of Draft quality 0.2 mm
    • Layer Height was 0.18 mm
    • Infill was 20%
    • Extruder temperature was 195 ° C
    • Temperature of the bed was 45 ° C

    I put the option of Build Plate Adhesion type “Raft” has the property that creates several capable in the plate,

    that is, generated a base on the lower part of the object and is practical to be able to remove the object of the printer.

    I put the extruder temperature 195 ° and the temperature of the plate 45 °

    You can see the object in 3D

    I removed the side supports

    I removed the support from the base

    Is a object that it could not be made subtractively, that is, by traditional methods it could not be manufactured.

    In this case, the sphere can never leave the cube.

    you can download the files by clicking on the bullets.

    Individual assignment- 3D Scan

    I used a Sense Scanner, which I allowed scanner me

    I used the skanect program that allows you to scan images using a Sense Scanner,

    I put parameters to start printing and then I click on the start button.

    the object to be scanned will appear inside the cube, since it delimits it.

    We can see the scan

    I set the parameter of WATERTIGHT, smoothing “Medium”, which allowed me to fix the errors of the scan, close the mesh to allow print it

    Finally, I exported the file to STL.

    You can download the file by clicking on the bullet.