Blender

Youtube-Tutorial: https://www.youtube.com/watch?v=ZI49VIcISaw&list=PL6Fiih6ItYsX3qdwhEyd77zy82bM-I8t1

Make Model Manifold

Under “Clean Up” → Make Manifold

Setup

Edit → Preferences

System → Undo Steps (Aim as high as possible, without slowing down your system).

Scene Propperties (Right site bottom selectors) change Units to Millimieter (0.001 and set Length to Millimeters) On viewport overlays (top right) change scale to 0.001

Add-Ons

Edit → Preferences → Add-ons

  • Bool Tool

  • LoopTools

  • 3D-Print Toolbox

  • PDT (Precision Drawing Tools)

Moving (looking around)

  • Pivot: Middle Mouse

  • Pan: Shift + Middle Mouse Button

  • Go (back to) the scene: Select the item you want to go to and click Numpad Periode key (.); Or use Shift + C

  • Edit → Preferences → Navigation → Fly & Walk (select what you want). Activate with Shift + ´ (Accent)

Create a 2D Shape

  • X: Delete (select what you want to delete in the menu that pops up)

  • Shift + A: Create a Vert

  • E: Extrude from selected Vertex

    • X / Y / Z for Direction

    • Type number of millimeters to move and press Enter

  • F: Fill Space between selected Vertexes

  • Ctrl: Snap Vertex to Grid

Move Vertices

  • Select Move (left hand side) or press G

  • Press the dimension you want to move (X / Y / Z)

  • Enter a number (with leading minus) how much you want the Vertice to move

https://docs.blender.org/manual/en/latest/modeling/meshes/editing/mesh/transform/basic.html

Rotate (R) Scale (S)

Copy Vertices

Select what you want to copy and press Shift + D

Make hole in Object

  • Select vertices, right click → seperate (P) → choose how you want to seperate (probably by selection)

  • Select the Object you want to subtract followed by the Object you want to be “cut into” (while holding down shift)

  • Ctrl + Shift + B (select which bool operation to use)

    • Or press Ctrl + Shift + Numpad - to choose difference

Round Corners of Plane

Select vertex or vertices and press Ctrl + Shift + B. With the Mouse-Wheel you can in/decrease the number of vertices to build the roundness.

Fix 3D for Printing

Bad Contiguos Edges

In Edit mode, I pressed A to select all, then Mesh → Normals → Recalculate Inside. This fixed it for me as my problematic edges were inside a cylinder recess in my object.

Zero Faces

Mesh → Cleanup → Degenerate Dissolve

Make mesh only use triangles

Select all Vertices → Ctrl + T

Usefull Informations

  • View Exact Coordinates of Vertex: Item (Right hand side) → Transform

  • Show Length of edges: Overlays (right top) → Edge Length

  • Cleanup Vertices: Right klick → merge verticates → by distance

  • Round edges: PDT → PDT Design Tools

  • Move to exact position: PDT → PDT Design Operations

  • Bezl (Round Corners): Ctrl + B

  • Hide everything unselected: Toggle Shift + H (Alt + H; for reverse)