Method of using a print head assembly for extrusion-based additive construction

A computer-implemented method of performing extrusion-based additive construction comprising:

• initiating, by a microcontroller of a 3D printer, an extrusion-based additive construction, the 3D printer equipped with a print head comprising:
• a hot end configured to provide heat to a material feed, and
• a cold end opposite the hot end, the cold end configured to maintain a temperature of the material feed for input to the hot end within a desired operating temperature range, wherein the cold end has a thermal monitor disposed therein, the thermal monitor configured to monitor a temperature of the cold end;
• reading, by the microcontroller from the thermal monitor, the thermal monitor to determine a current temperature of the cold end of the print head;
• assessing, by the microcontroller, whether the current temperature is above a predetermined temperature threshold, wherein the predetermined temperature threshold is based on the desired operating temperature range of the material feed;
• determining, by the microcontroller, that the current temperature is above the predetermined temperature threshold;
• and
• responsive to the determining, pausing, by the microcontroller, the extrusion-based additive construction to allow the cold end of the print head to cool to a print resume temperature,
• wherein the print resume temperature is equal to or below the predetermined temperature threshold.