Jump to content
Ultimaker Community of 3D Printing Experts
marinda

3d printing; a few questions

Recommended Posts

Hello, I am looking for people who have experience with 3d printing. I have a few questions:

- Is there a minimum thickness needed to get a 3d printed model solid?

- Did someone happen to try to print a light fitting/lampholder in 3d? And did you succeed?

- Which sorts of files can I import in fusion without losing the ability to change and scale the object. And are there any tips on which site i can do that?  

Share this post


Link to post
Share on other sites

HI

 

the minimum thickness of a wall depends on your nozzle diameter (usually 0.4), so you can print walls with a minimum thickness of 0.4mm. (There are some options and tricks to print even thinner walls, but that's another story).

 

Or do you mean something else with your first question?

 

Regarding lampholder, no haven't done it personally, but why not? Depending on your lamp temperature you have to use the correct material, maybe something more heat resistant than normal PLA.

 

There are a lot of possibilities to import files into Fusion, but I think you mean not Fusion but Cura? In Cura you usually import STL files and these files can be scaled before printing.

  • Like 1

Share this post


Link to post
Share on other sites

You can always make a model solid if you select 100% infill, or if you make the walls thicker than the model itself. Except that solid is not perfectly solid: there will always be tiny gaps inbetween the extruded saugages. Printing slow minimises them, but does not eliminate them.

 

To make a wall print reliably, I always make all walls minimum 0.5mm wide in the CAD-design, for my 0.4mm fixed size nozzles (old UM2). When the file is exported to STL, smooth corners are cut into straight segments. So, in some spots a 0.40mm wall might become 0.41mm, and in others it might be 0.39mm, which in older slicer versions lead to that part not being printed because it was too thin (less than 0.4mm). So now I just stay on the safe side, and 0.5mm also works well on a design grid. (I don't know how newer slicer versions handle this, I haven't tried.)

 

Yes, I did make a lamp shade, but printed it in PET for better temperature resistance, and for translucency. There is a LED lamp inside now. Do not use PLA, even not for LED-lamps, CFL- or TL-lamps: they still go higher than 50°C. And even with PET (or any other higher temp material), allow air flow and some distance. All lamps are designed with some free airflow around them in mind. And even then, some of my LED spots still get to ca. 100°C (so I wonder how long they will live, definitely not the advertised 25000...50000 hours).

 

Never use 3D-printed parts for incandescent lamps: at best the plastic leaks away, at worst it could catch fire and burn down your whole house. These need heat resistant bakelite, porcelain, or similar.

 

Edited by geert_2
  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Our picks

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 95 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies
×

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!