How To Mirror A PDF

This page explains one way to mirror a PDF on a Mac, especially for use with flipping a sewing pattern to be used with a projector. (If you are trying to mirror an image for an iron-on transfer, it’s a lot easier to bring up the ‘Layout’ section of the print dialog and tick the […]


3D Scanning

This blog post is to share research I’ve done while looking into 3D scanning as a requested topic for the Cardston Creative Technologists and presented on June 20, 2020. How does 3D scanning work? There are several types of 3D scanners. With one exception, they all use a camera to take pictures of something. Some […]


Stacks for Prusa MK2

I had a request to upload some stacked files for a Prusa MK2.5S. I sliced them with Cura (for the MK2, but I think it should be close enough), and the equivalent code I’m running on an MK3 is working fine. I’ve got two variations (and the STL file). One doesn’t use a brim, and […]


Stacking 3D Printed Shield Parts

Many people are trying to print lots of parts — especially for 3D printed face shields — to respond to 2020’s Covid-19 crisis. I’ve seen a way to stack masks using Luban, and one using Prusa Slicer and telling it about gaps to fill. Neither of these methods, however, allow you to flip the items […]


How ArUco Codes Work

One way to create an augmented reality application is through a AR marker; when your device’s camera detects the marker, it can figure out the relative orientation and position to the marker, and use that, in turn to draw dynamic 3D models on it. It can look a little bit like this: So, how does […]