Coolest Project

On Saturday the 7th of June, Coderdojo Coolest projects hosted their 3rd annual event in the Helix in DCU. CoderDojo is an open source, volunteer led movement orientated around running free not-for-profit coding clubs for young people. At the event we set up an Ultimaker 2 with the Doodle3D this enabled the kids to quickly get an understanding of the processes involved in 3D printing. It was also a platform for the kids to demonstrate their creative sides. It was incredible to see some of the kids imagination and outputted 3D prints from the kids using the Doodle3D, such as the Coderdojo Logos, Flowers and even toy guns!

We also co-ordinated a competition for participants to win a free Ultimaker original kit. The eventual winners were the Coderdojo from Dungarvin in Co.Waterford.

 

 

 

 

 

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Posted in 3D Design, 3D Printing

3D Printing Preparation

When people draft 3D models they are not necessarily 3D print ready. In this blog, I will discuss some issues where  models may look perfect on screen , but might not be 3D printable.

 

There are a few things that need to be checked before its ready to 3D printed, this is a list of things to look at when creating your 3D file.

Flipped Normals/faces

As you can see from this render the file looks ok

flipped normals

but as you can see from this image the same model has these (in red) flipped normals/faces.

Flippednorms_0000
and this is what happens when printing this model.

Flippednorms real

As you can see the printer has done its best to keep the file in one peace, it has filled the inside and you can see on the text the colour has changed. When the model is printed solid it would use more material and could cost more.

 

 

Holes

Holes are one of the biggest issues, if you have a open faces on your model this will cause problems when slicing the mode

from this render you can see it looks fine maybe you can see the hole in the model

holes

 

Here is a better render showing the holes.

Holes_0000
In the image below you can see how it was printed

Holes real

As you can see it printed but it was very delicate and broke under its own weight, it filled in the object which will cost more due to more material used.
Print ready file
normal

 

Here you can see a normal file with no holes or flipped normals/faces the render looks just like the other and this is what it looks like printed.

Normal real

As you can see it looks good and the inside is hollow which allow the use of less Matrails and a cheaper print.

 

 

As for multiple objects.
You can see here there are to object intersected from the render they look fine. but they are not Booleaned together and
intresected
When the cut the model in half you can see this easier.
intersected_0059
When it is printed you can see from the top it looks ok

Intersected real
But from the bottom you can see the to intersecting parts.
Intersected base real
Because of the extra parts inside this will add more material to the print and cost more

Joined Properly

looking at this render dose look like the last one the only difference is this is Booleaned/union-ed together.

 

Joined properly

 

 

when the model is cut in half you can see the difference

joinedpropper0059
when this is printed you can see again the top side looks good.

join proper real
The bottom is hollow and is using less matrails.
Joined proper base real

 

 

 

 

 

Posted in 3D Design, 3D Printing

Going Green for St. Patricks Day

Part of the ‘Going Green’ initiative by Tourism Ireland. Here in Hackett3D we produced this 150mm high green leaning tower of Pisa for PR agency Drury. We sourced a 3D file of the leaning tower of Pisa and prepared it for 3D printing. Mr.Gilmore looks extremely pleased with the print quality from our Projet660pro!

 

http://www.independent.ie/irish-news/disneyland-and-historic-petra-to-go-green-30003488.html

 

 

 

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Posted in 3D Design, 3D Printing

Outdoor 3D Scan

Following on from our successful 3D scan and 3D print of the runner we took the Sense 3D scanner outdoors to see what could be achieved with the portable scanner.

We stumbled upon a James Joyce statue in St.Stephen’s Green that we felt would be ideal for a 3D scan, it was head height so we would be able to move around the statue. On our first attempt to scan, it was a sunny day in March and with this the sun caused a slight glare on the statue therefore the 3D scanner was unable to read the geometry of the statue correctly. We didn’t have to wait long for a cloudy dull day, subsequently headed out to capture a successful scan. The lack of glare on the statue made it much easier to achieve the desired 3D scan.

We printed the scan on our desktop 3D printer the CubeX and on our larger full colour Projet660pro. The size of the models are 114mm x 98mm x 53mm they were scaled at 25%.

 

 

 

“Bring it to Life”

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Posted in 3D Printing, 3D Scanning

3D Scan and 3D Print

Hackett3D recently invested in the 3D Systems ‘’Sense’’ 3D scanner. Sense 3D scanner gives us the ability to observe a scene in three dimensions and then translates the observations into multiple depth images. It then takes and combines those depth frames into a 3D model made up of thousands of connected triangles, called a mesh.

 

3D System's Sense Scanner

Figure 1-3D System’s Sense Scanner

 

The first object we tried to scan was a runner, we tried and tested a few different techniques to catch the best possible scan.

  1.  Using as turntable- to do this we place the runner on a turntable, had the scanner fixed to a tripod stand and moved the object. However we learnt that the scanner gathers its information from geometry of the background rather than just from the object itself. So this method could not work.
  2. The next attempt we placed the runner in the middle of the table and scanned around the object. This scan was successful however it did not allow for a scan underneath the runner. We also established the best way to use the handheld scanner was with the laptop for mobility and use the screen as a guide. See Figure 2&3
  3. From what we learnt from our previous attempts, we hung the runner from a height to allow scanner to gather information underneath the object. See Figure 4
Figure 3

Figure 2

Figure 2

Figure 3

Shoe Hanging

Figure 4-Hanging runner

Figure 4-Sense reading the object

Figure 5-Sense reading the object

 

The scan of the runner is a print ready file, so it was only a matter of pressing print on our powder based Projet 660pro and plastic PLA CubeX printers.

On the Projet660pro the print took 1 hour and 30 minutes with 90 minutes of curing time post printing. The total volume of the runner was 11 cubic centimetres.

Projet Print Screen

Figure 6- Print Screen

Pre glueing

Figure 7- Runner after printing

Runner Print beside Keys

Figure 8- Scale of print

On the CubeX the print took just over 4 hours and weighed a total of 39 grams. With CubeX we had a choice of several different coloured PLA plastics, in the end we picked the red PLA.

Three Shoes

Figure 9- Runner & the two prints

 

Overall we found the Sense 3D scanner very easy to use, the print ready files were very convenient. Whilst the scan itself was not 100% it was still very accurate. We are now looking forward to testing the full capabilities of the scanner.

 

”Bring it to Life”

 

 

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Lets set the scale on things to come

Here in Hacketts we think it would help to see some type of key next to the prints to get a better idea of scale.

so we created this

 logo 1

 

The size of this is. 60x41x42mm

 

This is a the process of making the Key

 

1st the model is created in a 3d program.

 

 max gl

Next it is put into Magics to check to check to see if the model is air tight and fix any problems that may come up.

Davelogo

 

Then its time to print, remove the excess powder and using compressed air blow away any powder that left behind.

 

 

After that a glue substance is applied to harden the model and left to dry.

 

and here is the finish print.

logo 2

when you see the key next to an object it might help get a better idea of the size of the print.

 

 

Posted in 3D Printing

Printing a Large, Detailed Model. Hackett 3D Dublin office.

Hackett 3D set ourselves the challenge to push the boundaries of the Projet 660 Pro by producing a really large model in our Dublin office. We chose the Eiffel Tower because of its iconic nature and of course its intricate detail.

Day 1.  File preparation.

Capture

We took a 3D file of the tower and scaled it to be 820mm high and 370mm x 370mm at the base. We then split the model in to 7 different sections in order to print the pieces in the Projets build chamber.

Day 2. Printing the tower.

IMAG0043

The first sections of the tower were printed it 15 hours over night. After printing the finished  model is then excavated from the remaining powder. This is a very exciting time of a 3D printer’s work because as the powder is removed the model begins to reveal itself.  Over the next 15 hours the remaining sections of the build were printed over night. In total, the printing time on this build was 30 hours. Once all 7 sections of the build were printed, all remaining powder was removed and recycled.

Below is an image demonstrating the two largest sections of the build at two very different stages of production. In the back round are the other 5 sections that have been cleaned and are standing by for assembly.

ZOE_0009

Day 3. Final Assembly.

The morning of day 3 saw a very exciting time for the production of the tower, assembly. Starting from the top down all the sections were aligned and glued in place. As the sections started to take shape more and more of the Hackett’s staff were popping by to see how the build was getting on.  Below are some images of the assembly and the finished tower with an iphone beside it for size reference.

IMAG0066ZOE_0012

Some quick Eiffel Tower stats:

30 hour print time,

4 hour cleaning and sanding time,

2 hour assembly time,

One, 820mm x 370mm x 370mm 3D printer tower,

3 day turn around,

One very excited Hackett office,

And one very impressive show case model to show off you all who would like to come see it.

That’s all from us this week, stay tuned for more exciting 3D build.

The Hackett 3D team.

 

 

Posted in 3D Printing