Oversize Prints

[sbergmann 0]

Hello,

 

Have about 1 year service on an Ultimaker S5 Pro Bundle. 

 

One issue we have been unable to resolve so far is oversize print result. 

Outside and OD of parts are always 0.3-0.4mm oversize.

Inside features or ID, always 0.3-0.4 undersize.

 

Most of our parts are designed in house, in that case we compensate in CAD to get the desired result.

 

Problem is, for some work we are given only an .STL file.  Some are print in place or have internal and external features that must be on size.  Scaling alone will not resolve the issue.  Ideally, we would print the part on size.

 

In my personal life, have a Prusa and Ender printers.  .STLs mentioned above come out on size on Prusa and Ender using  Simplify 3D and Prusa Slicer.

Have tried many profiles and materials on the S5 with similar result.

 

Have searched for some time, please forgive me if there is a resolution here that was missed.

 

We have reduced flow previously with little or no improvement.

 

Appreciate any advise from similar experience.

 

Thank you,

 

Steve

 

 

[gr5 2,167]

You should be able to improve that with the "engineering" profiles.  S5 should have some engineering profiles.

 

Also be aware that smaller printers will give you better tolerances (So S3 typically better than S5 and UM2go is even better).

[Travis7s 25]

For undersize holes there is a feature in Cura called "Hole Horizontal Expansion" that works quite good, I typically just set to 0.4mm and this way you don't have to compensate in CAD.