The Automatic Nozzle Changer allows the machine to automatically load and unload the different sized nozzles. This eliminates the manual switching of nozzles during a job. The Nozzle Changer was designed for Juki Nozzles.

The design is based on the amazing work of Mike Menci. A video of his Nozzle Changing Station can be found here.

I first started with developing a Nozzle Changer where the Nozzle slides in from the side. I did not like this design because you need to be perfectly positioned in X, Y and Z-Coordinates inorder for the machine not to bump into the print and loose steps. You will need a 9g Servo, a Ball Joint from a cheap 2mm RC steering Joint (Link) and a couple of M3 screws. The part is just attached to the Aluminium Rails and the Servo is directly controlled by the Motion Controller. I am using the “M280” G-Code command to set the angle of the servo. You can just configure an Actuator before and after the Automatic Nozzle Changer in OpenPnP.