Between school and work, I’ve spent quite a bit of time around syringe pumps. They’re simple things, consisting of a single stepper motor, a controller, a syringe and some tubing, but they allow for very consistent flow of just about anything you can squeeze through a hole. Ever since I saw RichRap’s work on paste extrusion, I’ve been itching to try it out on a 3D printer. check it out for yourself: http://richrap.blogspot.com/2012/04/universal-paste-extruder-ceramic-food.html
This is my first shot at a paste extrtuder; all files and source are released under CC4.0, share alike license.
Rufu5’s got a video on his phone, mine was unfortunately died before we got it pumping
Going to try to have V2 posted over the weekend, I’m mixing up the design pretty significantly to allow mixing of pastes/chemicals and to allow better (read: ANY) retraction capabilities.