Servo driven nozzle wiper arm for delta printers

I like having a dump area on my 3D printers so they can prime the extruder, wipe the tip on its way to the print surface and immediately start printing without all the extra hairs and globs. Worked great for my modified bukobot but on a delta you can't just have a longer axis to prime it off the table. This was my quick and dirty solution.

http://youtu.be/GJjhfp9_WCU

http://3dprint.com/87898/3d-printer-hacks/