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I am trying to print a belt but when I preview it, the model doesn't fully render

Screenshot of half rendered preview

It isn't rendering the full model correctly. The model is rendering halfway but isn't fully which is why you can still see the infill when the slider is at max which isn't normal.

This is what it should look like:

Screenshot of fully rendered preview

I have a 0.4 nozzle and those with a 0.6 have been able to print this. What is going on?

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    $\begingroup$ Welcome to 3dPrinting.SE! What have you tried to change in order to get it to render? Is it throwing any exceptions? What isn't it doing exactly? $\endgroup$ Apr 19 '19 at 0:23
  • $\begingroup$ @Pᴀᴜʟsᴛᴇʀ2 it isn't rendering the full model correctly. The model is rendering halfway but isn't fully which is why you can still see the infill when the slider is at max which isn't norma $\endgroup$ Apr 19 '19 at 22:42
  • $\begingroup$ @Pᴀᴜʟsᴛᴇʀ2 I added what the model looks like and what it looks like when rendered $\endgroup$ Apr 19 '19 at 22:44
  • $\begingroup$ The second image helps a lot so we can understand what it should look like. Is this a print you got from Thingiverse? $\endgroup$ Apr 19 '19 at 23:02
  • $\begingroup$ Look in the lower right corner - can you setting it to 300 layers or 400? $\endgroup$
    – Trish
    May 23 '19 at 20:13
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First I thought that the model was improperly modeled due inverted faces or any missing line to close that faces but, I rendered the same STL to be printed 0.4 nozzle with height 0.2mm and looks pretty well.

enter image description here

Then I suspected that you were trying to print with 0.4 nozzle at 0.6 layers, which this is totally wrong but, I decided to set the 3D simplify and do the test. The program just show a warning about first layer height adhesion, the click OK and the part is rendered correctly.

enter image description here

However the recommended settings for a 0.4 nozzle should be less than 80% diameter = 0.32mm as maximum to get a proper bonding.

So, I think that you need to download the part and render it again. The time to process this render under XP with an small PC last for 5 minutes. So on bigger PC's will be faster.

Here is the link where I downloaded the "belt Komplett 805"

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