WEEK 5 - 3D SCANNING AND PRINTING

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"do 3D print that could not be made subtractively" - this keep me thinking this week. 3d printing seems like a debatable topic.is 3d printing the future of manufacturing?? or is it just a overhyped technology? many thoughts like this is ARISING inside me this week.

assignment

group assignment

  • test the design rules for your 3D printer(s)
    individual assignment
  • 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

You can find our group page here and this week group ASSIGNMENT here. we tested the design rules for different 3d printers in our lab

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about 3d printing

3d printing is a additive manufacturing process of making 3d objects from digital file.there are many 3d printing methods like -

  • Stereolithography (SLA)
  • Selective Laser Sintering (SLS)
  • Fused Deposition MODELLING (FDM)
  • Digital Light Process (DLP)
  • Multi Jet Fusion (MJF)
  • PolyJet
  • Direct Metal Laser Sintering (DMLS)
  • Electron Beam Melting (EBM)
  • vat polymerisation
    our super fablab is equiped with most of the above machines....

in which fdm is the most popular option to 3d print and pla is the most PREFERRED material for this printing technique

*fdm process animation*

(add 3d MANUFACTURING chart here with writeup)

here we use prusa i3 mk3 by Prusa Research. it is a 3D printing company based in Prague, Czech Republic. It was founded in 2012 by Josef Prusa - one of the core RepRap developers.

3d printer do not need a learning curve to set it up . but we need to learn how to change and load FILAMENT in it.

steps to unload

navigate in the menu with lcd knob to find unload filament option.click to see the extruder heating up to loosen the filament
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unloading .....

steps to reload

navigate in the menu with lcd knob to find load filament option.click to see the extruder heating up and you can put the filament end inside it.

you can feel a pull from extruder in hand when inserting the filament which means extruder is gripping ok
*reloading....

  • now you can see the dialog box saying "Filament extruding with correct COLOUR?"

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there will be some spaghetti on bed which should be removed from the bed before starting print...

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printing my first design.

for me in my mind 3d printing comes with personalisation. so i designed a small ring using fusion by measuring the size of my finger ring using a digital vernier CALLIPER.

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used fusion to design this small ring with my fingers dimension.added a small fillet o it.

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then exported it into .stl file format. you can also export it into other formats like .obj

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then i installed the prusa slicer to slice the stl files and to convert then into gcodes.

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from 3d bros website

in the slicer input the settings depending upon the parameters
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parameter settings
print setting:-0.30mm draft
infill:- 15%

slice the file and convert it into gcodes copy files in a storage device and connect to the printer and start printing.
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its fits well - power of 3d printing.

i got a personalised ring in my hand within 5 minutes!!!!!!!!

using openscad

i designed a print in place ball bearing using openscad which works by code. i followed a youtube video to design

$fn =50;


rotate_extrude(){
    difference(){
        union(){
            translate([10.5,0,0]) square([5,7], center = true);
            translate([19.5,0,0]) square([5,7], center = true);
        }
translate ([14.75,0,0]) circle(3.5);
    }

}
for (ball = [0:30:360] ) {
    rotate([0,0,ball])
    
    translate([14.75,0,0])
    sphere( r=3.25);
}

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i am finding this easy to design. but will need a learing curve to get comfortable with openscad. i want to explore more ......

but the 3d print did not came up well. i do not know the reason.maybe trying ONE MORE time help
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trying chat gpt

openscad works with code. lets create the code using chat gpt. i prompted to create a hexagon in chat gpt and pasted the code in openscad. i could have done this in Week 2 - Computer Aided Design .

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from chat gpt

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yes its working for simple structures but i am finding it difficult to generate code for more complex structures.

finishing the assignment

this weeks assignment question is quiet INTRIGUING. i am designing a print in place gyro keychain using fusion 360.

after designing i exported it into prusa. prusa slicer will allow us to visualise layer by layer deposition which help us to make many decisions regarding the print.

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printing my assignment

removing the print after completion somewhat tricky in SOME CASES.since its a magnetic bed, flex it and remove the print.

removing the print from the bed

exploring LITHOPONE

lithopane is a thin plaque of translucent material, normally porcelain, which has been moulded to varying thickness, such that when lit from behind the different thicknesses show as different shades, forming an image

i used lithopane maker to create a LITHOPONE stl file.

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the file

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the result

3d scanning (exploring using iphone face id)

apple iphone have this feature called face id consisting of two parts: a vertical-cavity surface-emitting laser dot projector module that projects more than 30,000 infrared dots onto the user's face, and an infrared camera module that reads the pattern.

people figured out a way use this feature to 3d scan objects which means we do not need lidar enabled phones to 3d scan. any iphones after iphone x can now 3d scan.

to try this out i am using the free version of scandy pro app available in app store.

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my first scan

this app have an option of colour scan too..
“videofab32_compressed.mp4” could not be found.

i think its coming good in colour also.there are INBUILT post PROCESSING tool in THE app.


the result

artec leo

artec leo is the world’s first wireless and AI-driven 3D scanner available in our lab. phone scanners are not suitable for more processor intensive and complex structures.

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from user manual of artech leo

these are the error icons in artec leo
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so i need to find a SUITABLE thing to scan with this scanner which should be something not easy to design. there is a old rustic bench near our cafeteria in our BUILDING. i choose to scan it because it have some natural rustic texture.

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my scanning object
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when 3d scanning keep this mantra in head "Focus on Display & Be Flexible"

a. Pay closer attention to the object on the screen than to the actual object.

b. Direct the scanner at the object from different angles.

c. Move your wrist to turn and tilt the scanner, as necessary.

d. Use the TILT-ABLE display.

use the trigger button on the handle to start/stop scanning.
AFTER SCANNING AN IMAGE, SAVE THE SCAN AS A PROJECT WITH ITS DESIRED TEXTURe

post processing

post processing with artec leo is quete memory intensive. so iam using labs pc to do this. artec app is already installed in it.

connect an lan cable to copy the files.

lAUNCH ARTEC STUDIO: SITTING IN FRONT OF MY LABS PC, I OPENed THE ARTEC STUDIO SOFTWARE. THIS ALLOWed ME TO ACCESS AND PROCESS THE SCAN DATA THAT WAS CAPTURED ON THE ARTEC LEO SCANNER.

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lAUNCH ARTEC STUDIO: SITTING IN FRONT OF MY LABS PC, I'LL OPEN THE ARTEC STUDIO SOFTWARE. THIS WILL ALLOW ME TO ACCESS AND PROCESS THE SCAN DATA THAT WAS CAPTURED ON THE ARTEC LEO SCANNER.

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load the files by right clicking if showing like this

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i removed the base by base selection in editor

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NOW CLEAN THE REMAINING UNNECESSARy parts .

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cleaning.....

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NOW I HAVE TO GO TO THE 'FIX HOLES' SECTION. IT WILL IDENTIFY SOME AS FEATURES, OTHERS AS HOLES THAT NEED TO BE FIXED. SO GO THROUGH EACH HOLE AND FIX THEM
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below are features of the bech in which the system identified as holes. i need to skip this
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there are some parts whicha re not scanned well this likee. this will need a lot of patchup.
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I MOVED TO TEXTURE BUT IT TOOK AGES TO PROCESS. SO I SWITCHED TO ANOTHER PC WITH 32GB RAM AND ADDED TEXTURES.

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i loved ho the RUSTIC and antique tha came up using artec leo 😍


since the computer got stuck i have to take a video to show the final result

i really wanna embed it using sketch fab but the files is larger.

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maybe i wll embed after minifying it later...