Heads up right off the bat: this is a challenge to print well. So take it as a challenge and get your printer dialed in for a perfect first layer and dimensionally accurate result!

Features:

• Pencil indexing from the top, bottom, or middle of the square with square notches that will hold the pencil exactly where it needs to be.
• 2 piece construction to fit on a 200 or 220 mm bed. Print diagonally!
• Handle is exactly 1" as inscribed so it can also be used for measuring.
• Swap to a different colour for the middle layers to get a nice contrast for the text and lines.
• Imperial only. Will consider metric if there is enough interest!

Important Notes:

1. 3 x M4-12mm hex cap screws are required.
2. The coefficient of thermal expansion WILL affect your print and the ruler will likely be slightly too short after it cools if you print at a normal 100% scale factor. For PLA I found the best scale factor to be 100.2% to be dimensionally accurate when it cooled. I did not pre-scale the provided STL (it is perfectly dimensionally accurate) as doing that would be chaotic.
3. Print the handle at whatever infill you want. 20% infill feels a bit too light with not enough substance. 50% or 75% infill gives the handle some heft.
4. Print the ruler at 75% or 100% infill. It is fairly thin and this will have minimal effect on how much material is used.
5. The first layer is very complex with all of the holes. If you have issues with adhesion try lowering the speed and acceleration of the first layer, or increasing temps of the first layer. You really need it dialed in to print well. My PLA print was on a smooth PEI sheet and although I never had issues, it is very apparent that it will give a lot of people grief!
6. On assembly, use something square (like a square!) to make sure the ruler and handle are at a 90 degree angle. Check the dimensions with another ruler.