WEEK five

This week for learn to use 3D printer and make 3D scan .3D Printing also known as additive manufacturing (AM).goals of this week make a 3D design and print it,that can't be made subtractively and scan an object

3d printing


In our fablab using 3d printer ultimaker 2



volume: 23 x 22.5 x 20.5 cm
Position precision X Y Z: 12.5 / 12.5 / 5 micron
Print speed: 30 mm/s – 300 mm/s        
Travel speed: 30 mm/s – 350 mm/s
Recommended filament diameter: 2.85 m
Nozzle diameter: 0.4 mm
Stand-alone SD-card printing
WiFi printing ready (future upgradeable)
Software: Cura – Official Ultimak















I started to playing with settings . I really want some directions for setting the machine to get a decent looking prints . I got many ways to get good quality print but in my opinion it boils down to these four points:

  • Speed

    set slow Printing speed (20-30mm/s), it will improve print quality but will obviously increase time to complete the print .


  • Temperature

    A higher temperature will be help to print faster. When set higher temperature it will increase filament viscosity a so you will able to print faster


  • Layer height

    AThis is the most important parameter. When set a bigger layer hight (0.2mm) it will print faster but produce a more coarse surface. Setting the layer height below 0.1 is usually not necessary because it takes ages and the visible improvement is minimal.








Testing the limits of printer.

For testing printing quality of our 3D printer we download .stl format test file form http://www.thingiverse.com/thing:1363023 . Downloaded design contain geometric shapes and angles .after complete the printing we measure the sizes of geometric models on printed model (show below) and compare with design



  • Nut, Size M4 Nut should fit perfectly:
    yes got perfect fit

  • Wave, rounded print:
    Looks fine

  • Star, Sharp Edges:
    yes

  • Name, Complex Shapes:
    Look fine

  • Holes, Size 3, 4, 5 mm:
    Came out nicely. Measured 2.8,3.74,4.7

  • Minimal Distance: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 mm:
    0.5 mm was the minimum gap that was clearly visible, smaller than that wasn’t - this is probably because we were using the 0.4 mm nozzle size.

  • Wall Thickness: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 mm
    Printed only 3 walls. This too would be because of the nozzle size.

  • Bridge Print: 2, 4, 8, 16 mm:
    Dimensions match

  • Sphere, Rounded Print 4.8mm height:
    Was around 4mm.

  • Overhang: 25, 30, 35, 40, 45, 50, 55, 60, 65, 70°:
    It was able to print all










Design 1

Next assignment is make a 3D design and print it. I decided to use Blender 3D soft were for design a nonobstructive 3D structure, I already have some previous experience with the blender.

Blender is a professional free and open-source 3D computer graphics software product used for creating animated films, visual effects, art, 3D printed models.

Then I start with a simple design of 3D slimily structure with hole inside the structure .in this structure has internal channels and spherical-like shapes, this is something that cannot be made using CNC mill, absolutely no way to create subtractively as a single piece, because no tool can not move fully over the surface of this designs spherical shape and complex to make cavity inside the solid spear

Then I start to design smiley structure. For this, I add three sphere mesh, a torus mesh, and cylinder mesh ( for getting add menu "Shift + A" )









smiley 3D by rashid on Sketchfab


Exported .stl file open with cura . Cura is 3D printer software for slicing models to G-Code format., Developed through open source collaboration. It's optimized for the Ultimaker 3D printer, but it works fine with any printer based on the RepRap model .Then .stl file export it into .gcod format. Then I make the change on printing quality forget a good quality print with small time

    Basic Settings

  • layer height = 0.1mm
  • shell thickness = 0.8mm
  • retraction = enabled
  • botom/top thickness = 0.8mm
  • Fill density = 50% (although it can be done with higher shell thickness and no infill)
  • Speed and temperature = Default for this machine
  • Support = none


    Advanced Settings

  • Quality = Default
  • Speed = (50;20;50;20;30;60 - by order)
  • Extra settings tweaked on the printer
  • PLA temperature 240/250 - changes grade of transparency as well
  • Flow = 115%


Then print it





download .stl file
download .blend file






Design 2

Then I start design a simple alarm clock using blender. show the design steps on my video







Clock by rashidt on Sketchfab







download .stl file
download .blend file




Problem


Don't give any support for printing this shape due to this incline portions of design not get perfectly. After printing, I shape damaged area using a knife I from injured area using a knife

3D scanning




I am using Microsoft Kinect (line of motion sensing input devices) for 3D scan . I tried two softwares (k-scan & skanect) with kinect for scanning


problem faced : software is not detecting the censor ( Kinect ). the error occurred because of, ther is no drivers installed for kinect . This problem solved by installing correct driver





First i decided to scan my friend jaseel .I used Kinect with k-scan to do this scan







then I scan a statue .for this I using the software skanect

Model2 by rashid on Sketchfab



After the scanning it export to .stl format ,
download scanned .stl file

Then it open with blender and make some changes like remove unwanted parts


Edited Statue by rashid on Sketchfab



download edited .stl file