Thước Trammel (Trammel Ruler)

A tool to make straight lines along a straight edge at an offset. 

Easy print. See orientations below

Fully customizable Fusion 360 and STEP files included.

Printing

There are two options for the slide and head as I have included a layer to improve bolt hole quality. Those files carry the additional _hole_trick in the file name.

Hardware

• M3 Screws
  • 16mm+ for clamp
  • 8mm for fixing pen/pencil
  • 2x 16/20mm for fixing slide to arm
• A pen or pencil.
• M3 Nut
• Glue (optional) would be useful to secure the nut.

Customization

The fusion file has two parameters:

• arm_length_cm: should be a whole number and dictates the length of the arm where you mount the pen.
• slide_height: mm value that dictates the height of the slide could be useful if you need a smaller one for tight spaces or a longer one for larger jobs and extra stability.