A couple things for the custom Bartendro (http://www.partyrobotics.com). The first is an adjustable dispenser assembly, and the second a cover for the pump motor and PCB. I’ve mounted the pumps inside a mini-fridge and wanted to protect them from bumps and splashes.
Cool idea!
how do you prevent the leaking of the tubes?
Umm, proper connections? 
… the leaking out of the END of the tubes while not in use? E.g. how to keep the fluids IN the tubes? Or are they just running empty back into the reservoirs?
@Rene_Jurack if the tube is small enough i belive that as long as the rive is shut on one end it shouldn’t come out beacuse the air can’t replace it. Just like converting the end of a straw if you get what i mean
I am asking, because I was involved in something similar. Only bigger
And one problem to solve was leaking of the tubes.
http://www.kle-point.de/bilder/global/2016/01/26/46et945yu_500.jpg
As Matthew mentioned, this design relies on the surface tension of the fluids and a small opening to forstal leaking. The pumps are peristaltic that maintain a tight seal so the fluid cannot drain back into the reservoirs on their own without the pumps moving.


