How to 3D-print. A guide.

  1. Things to remember about the Model: 

SIZE! Can it fit into the machine

 Maximum size for the:

  • ZCorp: 254x203x203 (xyz)
  • Connex3: 342x342x200 (xyz)

Huge and very expensive models are only made after a  discussion.

A "normal" size could range from a pencil to a tea cup

Set the SIZE and position!
Rotate -and -adjust -Size -with -Meshmixer _240px (59 sec) 


The Cost to print

 If you are using the schools 3d-printers
see below (step 3.c)   for an
exact cost calculation

Here's some student examples ( right) ->

Some external links for a free Quote calculation

Some links to local possibilities


ZCorp _Voronoi _300px

Connex 3_Transp _300px

Printed _Stuff _300px

3D-printable? Check for errors

  • Drag and drop your STL-file into   Netfabb Basic (free)
  • Click the Red Cross for repair
  • Click Update in the control panel that appears
  • Confirm that you have;
    • Border edges: 0
    • invalid orientation: 0
    • Holes: 0
    • Shells: 1
      It safest with 1 but it might work well with several shells also... 

 Check for problems!
Check _In _Netfabb _240px(34 sec)

Analyze and a easy Quick repair
GIF-animation Icon



If you want to fit a pin in a hole you need some "air" between the parts.
ZCorp: 0.5 mm      Connex3: 0.3 mm
If painting the parts you need more!

Enough strength

Walls should, if possible, not be less than:
ZCorp: 3 mm The plaster is very fragile.
Connex3: 0.3 mm

Knife-like edges should be rounded!

Surfaces and Meshes outwards

Set the surfaces normals before exporting from a surface tool like Alias or Rhino

Autodesk Alias:
With the Surface Normal tool everything should be blue  and not yellow
With the Mesh Normal tool everything should be gray and not yellow
The mesh should be completly green. If red try to flip it with right-click -> Extended -> Invert Part



2. How to export your Rapid Prototyping STL-files 

The amount and size  of the triangles (polygons) in a STL-files sets the quality. You want as many triangles as possibly without creating ridiculous big file sizes. Decide by looking at a rounded silhouette and judge the smoothness. But try to keep your files under 20 mb. Above 50mb is probably overkill!

Export STL (external tutorials):

Sculpteo _Rhino

Sculpteo _Alias

Sculpteo _Solid Works

Sculpteo _Meshmixer
Sculpteo _Sketch Up
Sculpteo _Fusion 360
  1. Hide all bodies except one in your Part file
  2. Zoom into a rounded silhouette of your model
  3. File > Save As > Save as type: STL   (binary)
  4. Preview ON
  5. Adjust Deviation. Start with 0,1 to 0,05mm
  6. Look at the Mesh. Is it smooth?
  7. Adjust Angle. Start with 10 to 5 deg
  8. Look at the Mesh. Is it smooth?
  9. Check the file size!!! Try to keep it below 10 mb (if possibly)
  10. Save the file
  11. CHECK IN NETFABB!   ����

Always check and possibly repair your STL-file!

Is it really print ready?
Just drag and drop into Netfabb Basic (free)
Works on Mac and PC :)
Check _In _Netfabb _240px



3. STL files on the Server and Contact Operator


A. Copy the  STL file(s)
into a folder with
your name in:


CAID_files _Original Size


Connex 3_300px
_STL file
s for Rapid Objet 
The Connex 3D-printer
ZCorp 450_300px
_STL files for Z-corp Rapid
The ZCorp 3D-printer



B. Send an Email:

This is received  by David, Patrik, Lars B and Fredrik.

In the email write:

  1. Filename(s)
  2. Project type. For example: examination, course or private

Don't email the actual STL-files (they will fill up the email inbox)


C. Now contact in person (walk to) Patrik, Lars B or Fredrik for planning of the 3D-printing

Material choice, size, model analyze, time scheduling is discussed.

The exact cost is calculated and approved by you before any printing.

If your model is not ok then it's back to step number 1 again :)







STL repair software links;