3d project scales to big when downloaded

[manzanillolove 0]

newbie to the 3d printing world. currently using ender 3pro and when i download a stl file from thingiverse and view it on cura the object is way to big. for instance I downloaded an extruder knob and when i loaded it into cure the size jumped to 6000mm in height when in reality it should be around 83mm.

[GregValiant 1,357]

The scale that a model was designed in comes into play.  Cura works in millimeters but the model designer may have worked in inches or centimeters or parsecs.

There are a couple of settings you can check.

With the model selected on the build plate select the "Scale" tool on the left toolbar.  If the "%" is not "100%" then Cura automatically scaled the model.

In the Preferences and on the General tab and in the Open and Save section is "Scale Large Models" and "Scale extremely small models".  You can try playing with those.

If you run into this problem a lot you can go to the Cura MarketPlace and load the Mesh Tools plugin.  After restarting Cura you will have a new command under Extensions.  The Mesh Tools settings has an option for picking the default scale for models opened in Cura.

 

Most CAD programs simply work in "units" and have no concept of what 1 unit is equal to.  It could be 1 inch or 1mm or 1 mile.  The "unit" is a function of the designers intent.  So sometimes you will import a model and it will be way out of size.  Just check those scale boxes to see what happened.  If the scale needs to be set to 2540% you can be pretty sure the model was designed in inches.  When that is the case the model would need to be scaled up for Cura to print it at the correct size.

[manzanillolove 0]

thankyou so much ive literally spent hours trying to find the solution.