Close

Closed Cycle Material Supply System

A project log for DIY Inkjet Printer

A piezo inkjet printer built from scratch

Dominik MeffertDominik Meffert 12/01/2019 at 14:523 Comments

I've added a Closed Cycle Material Supply System in form of a T fitting with some hose connectors, a Nema 17 stepper motor driven peristaltic pump, an extern stepper driver, a check valve and some silicon tubes to solve the problem of continuous material supply.

The pump pumps the material to the T fitting, which is mounted in the correct hight, so that the printhead neither leaks nor runs dry. In the top of the T fitting is a hole drilled, so that the pump not influences the pressure between the T fitting and the printhead. A small amount of the material is used for printing, but the majority of it flows back to the tank.

This way there is always enough material in the T fitting to print until the tank is empty and besides of once setting up the right hight of the T fitting and refilling the tank when it's empty there is no additional maintenance needed.

I use a peristaltic pump, because that way the pump has no direct contact with the material which maybe could damage the pump or contaminate the material.

I changed the stepper motor pump to a 12V DC motor pump & speed controller from amazon because a stepper motor is not necessary for just pumping the fluid continuous through the system.

Discussions

Krzysztof wrote 12/04/2019 at 11:28 point

Wow, ingenious way of supplying ink.

  Are you sure? yes | no

Dominik Meffert wrote 12/07/2019 at 13:56 point

Thank you. I've tried so many different approaches, but everything was either to complex or has not worked.

Wonder why I've not thought of it earlier.

  Are you sure? yes | no

Krzysztof wrote 12/07/2019 at 17:53 point

It's one of those ideas which looks simple in hindsight, those "eureka" moments. Ingenious IS the best word for describing this.

  Are you sure? yes | no