Printed dimension differ from original model

[Christian_Simon]

Hi,

I assume this is a common problem, but don’t know the word for it. But when I print a part it is typically about 5-6% larger than the 3D model on the outer diameters, and about 2-3 % smaller on the inner diameter. So basically when I’ve designed a model 100% according the a real life model, when it is printed it is either to tight on the inner parts, or two large on the outer.

I need to print something which is exactly as the model that I’ve created (or within 0-2 % at least). How do I go about fixing this. Is there a setting in Cura that I use, or do I have to compensate for the print differences in the designed model?

By the way Im using Sketchup, Cura and Vertex K8400.

[Noah]

To a certain degree, this problem will always exist. It doesn’t hurt to take this into account somewhat when designing your models, mostly just making holes a tiny bit bigger than they need to be. Try lowering your flow and measure the filament to make sure it is exactly how thick you think it is.

[SOC3D]

What sizes are we talking about? You gave percentages however 2% of a 1cm model is less than a typical line width while 2% of a 10cm model is more of an issue. Also what material are you printing with?

[GloomySparker]

On my point of view, 5-6% is quite more than the printer should give you. And because you seem to tell it’s always approximatively the same percentage, you should think of calibrate your K8400.

[Christian_Simon]

Ok, so basically print a few of these test models and measure the actual sizes when printed.

I’ll try to do some of these this evening.

[Christian_Simon]

Hi,

The easy part first, I’m printing with PLA.

The part that I am talking about is attached below. Don’t have the measurements in from of me, by I assume it is about 2-4 cm in diameter where I measured 5-6% larger on the outside.