(Updated)The Tool Sharpie 3 in 1 - Compass, straight line, and ruler all in one!

Ever wanted to skip sketching a straight line or circle with pencil and go straight to maker? Me too!! And you probably know that in doing so you may ruin the drawing!!:(  Well your in luck! Introducing the Tool Sharpie 3 in 1 tool for Sarpies, pens, pencils, and other “off” brand makers. Draw straight lines, or perfect circles/arcs with out the pencil sketch, and prevent your rulers getting marked up with pencil, maker, etc. 

How It Works: A carriage with a sharpie attaches to the rail, so it can go back and forth (making a line) the “compass button” can be inserted for…well…using it as a compass. (See video for visuals)

This is designed for Sharpies but will work with all makers, pens, dry erase makers, and pencils the same size or smaller. For smaller get a simple M4 screw and nut that you have lying around (or get one from the hardware store for under 50 cents) and insert it into the hole, thus tightening the utensil to the barrel of the carriage. Then get a M3 screw and nut for the tightening the carriage to the rail (when you want to use the compass)

Please note: Sanding of parts my be needed if things don’t fit or run smoothly. The carriage may need to be moved back and forth before it ru smoothly. A heat gun may be needed to pre tape the two holes got the M3 screws; the M3 nut may need heat as well for the nob. Also this tool is about 23cm long so a bigger print bed would be ideal, however, I managed to print it on me Ender 3 oriented sideways. 

Update: I added a better tightening system; for the size of you utensil and for the use of the compass. I will not update the video or some of the photo, but the main function is still there. I have also added carriages for wood pencils and Bic mechanical pencils (because they are cheap)

You will need:

1x M4x20 

1x M4 nut

1x M3x20 (or longer, up to you)

1x M3 nut

Happy printing!!!!