Drawbot Quick Change Pen Holder

This is a 3-d printable version of a quick change pen gondola for the DrawBot. It's capable of holding a fine point sharpie or slightly larger pen (like an expo dry erase - fine-point).

For a counter weight is uses 2 dead AA batteries (or what ever else you want to mount on it).

The servo arms are positioned to hold a Turnigy TG9e 9g servo. As of right now I don't have one of these to test pen up/down functionality but it should work with an appropriately positioned servo arm. For now I've added a couple washers to my servo arms where the weight contributed by the servo should be.

I'll be posting up another one capable of holding a Sharpie Magnum (the really big sharpie).