Jump to content
Ultimaker Community of 3D Printing Experts
HSA76

Post stretch script

Recommended Posts

Hi Everybody!

 

My problem is that my UM3 makes hole Ø0.4mm too small and my outside parts 0,2mm too big, and it doesn't matter if the part size is big or small, I wish that holes always is a little bigger and outer dimension always smaller, i found the script "Post stretch script" witch i thougth would do the job, but i can't find out how it works. If i increase parameter Wide circle stretch distance holes will be biggerbut also outer dimensions, and if i change the parameter Push wall stretch distance nothing happens.

 

I been testing a lot of cubes with a hole, 20x20x20mm with a Ø10mm hole.

 

Can anyone describe for me what exacly the two parameters really do?

if anyone has a solution for this that don't include remodelling I would be really happy to hear about it. (I usually get models from clients that are modelled with many surfaces and it is really hard to modify them so two parts will fit to each others..)

 

 

Share this post


Link to post
Share on other sites

Thanks!

 

I have now make some more testing, with partly great result, for nylon i'm tweaked Horisontal expansion seting and got partly better result, and togheter with post stretch script i could get part outer dim to 19,97mm and inner dim to Ø10,12, that is great. 

 

Know im trying to get rid of the "mouse ears" that shows on outer corners. ?

Share this post


Link to post
Share on other sites

The "fat corner" issue is better fixed by increasing jerk and acceleration (if your printer can do that without losing steps) and also by lowering the speed by a lot.  Try cutting speed in half.

 

The UM3 can indeed take much higher acceleration than the defaults but you will get a new problem called "ringing" but if you care about tolerances more than looks, then ringing shouldn't bother you at all as those are basically not measurable with a micrometer but are quite visible to the eye if you shine the light just right (not hard to do at all).

 

In fact you could just uncheck "acceleration control" and "jerk control" and those corners should get really nice.  Or cut the print speed in half.

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

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 92 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 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!