Camaroboy383
Invention is the mother of necessity!
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What makes you prefer random z alignment?
There are several reasons I prefer random..
Dimensional accuracy increases slightly, when we select a certain start/stop point there will be the bulge of the seam.. it's definitely easy enough to clean up that corner, but then your left with a marked up part that needs a touch more post processing..
Ease of post processing, if I intend to paint a part it's extremely easy to knock random tiny bumps down all over. . Versus trying to pull a corner or flat down flush without disturbing the rest of the model...
It seems to be the less of all evil's for me, one less setting I have to play with for every model...
On thin walled models a z seam is a very weak point.. you can picture the start/stop positions like this.. )(. Can't be seen with the naked eye but under magnification it would show...
That all being said,
An extremely fine tuned coasting, retraction, and prime setting can make a model look seamless, and more injection molded.. placing these more precise stop start points randomly makes them even harder to see, increasing the seamless look..
Sorry for the long read.. just many of the reasons I use random..