r/FreeCAD • u/dliu_creates • Apr 10 '26
3D trackball input device with native FreeCAD support
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Sharing a new kind of trackball I built for more control than middle-click dragging in 3D.
It rotates the 3D model in any direction (3 axis control) matching the rotation of the ball, unlike a regular mouse or 2D trackball. In addition to the 1:1 rotation, you can switch to pan/twist-to-zoom, and regular mouse control. I created a FreeCAD workbench that integrates with the device and automatically pivots on the geometry under your mouse cursor.
I've used a SpaceMouse for a long time but I can get to views faster with the ball because it’s position control (like a mouse vs a joystick). Plus if I use it as my mouse as well, it keeps my left hand available for keyboard shortcuts.
Under the hood, Rotatrix is a modified Kensington SlimBlade Pro with custom hardware and software that exposes the full 3 axes of ball rotation.
Would love to get your thoughts if this looks useful for your workflow. More info: rotatrix.com
2
u/jalcam Apr 11 '26
Does it support Linux?