I’m new to 3d printing. I recently designed my 1st part from scratch. Basically just a disc with a recess and a through hole. I used sketchup as I’ve been a woodworker for years and am familiar with it. I drew up the part and exported as a stl. Opened in cura and the part looked just as it did in sketchup however when I printed the part it printed as a solid disc no recess no hole. Any ideas what Ive done wrong?

Try to correct your model in netfabb basic. It is probably corrupted.

There is an new add on for Sketchup. Check it out.

https://makeprintable.com/page/5/plugins