PosterBot: Make a Marker-Writing Robot out of an Old Inket printer and an iRobot Create

Step 3 Make the marker lowerer

In order to make the marker lowerer, you'll need to remove the black print-carriage from the larger structure as seen in the picture showing the separate components. You will need to unscrew the screws that fasten it to the belt. You will also need slide out the metal rod so that the plastic piece can come out.

You'll then want to attach the paper advancer to this black print-carriage piece. Keep in mind the orientation of the future marker and the need for the carriage to slide without impediment.

I used epoxy to attach the bearings to the carriage. I found that Hot-melt Glue is handy to use to keep the parts in place while the epoxy cures. By attaching a piece of wood (bass), you can create a platform so that the marker can be rubber banded on and replaced easily. The small perpendicular piece allows the epoxy to have a greater surface area against the metal.

After this is done, reassemble the complete carriage.

I suggest that you add a foam block or some other stopping device that will stop the marker at it's vertical position. Also, a smaller rubber band to help the marker return to it's neutral position is helpful.

While you're welcome to experiment with different mediums, the best one I found was the fumeless poster paint marker; it's surprisingly long lasting. You should be able to buy both the bass wood and the marker at your local craft store