The calibration probe is removable and mounted onto the print bed. Each print head comes over and probes the spring loaded steel ball which triggers a switch, a location for the nozzle is then determined.
The process is repeated for multiple print heads and the offset values are presented.
The probe is accurate to 0.05mm.
Learn more about the Proforge 4 Tool Changer 3D Printer here: https://www.makertech3d.com/pages/pro...
Calibration tool is based upon the work done by Viesturz, learn more here: https://github.com/viesturz/NozzleAlign