Final project - improvement

I am already working on second version with my own peristaltic.

Here I use a DC motor that is recuperation from a former student project, that cost around 10 euors. It could have been this motor on Aliexpress |

For the second spiral of the project the idea will be to make my own peristaltic pump. I already have test some ideas but the system still need to be improve to work well. I designed the holder for ballbearings.

The peristaltic pump system.

And the two parts printed.

It doesnt work now because the pipe is too small to go out the peristaltic pump system. There is still some air inside, the ball bearing does not compress enough the pipe, that is still the improvement need.

Here is the file of the peristaltic pump