Extruder Heating Profile
I have made several prints with my Prusa XL single-tool now. I have noticed that when the extruder is heating for PLA it heats to 170C, checks Z-axis, then sets extruder set-point to 70C. It cools off a bit then the set-point goes to 230C for printing. Why? The display says "absorbing heat" while all this is happening.
RE: Extruder Heating Profile
Hi Chuck,
This behavior is normal on Prusa printers. The initial heat to around 170 °C allows the printer to perform Z-axis probing without filament oozing. Lowering the temperature afterward helps prevent heat creep and stringing before the nozzle ramps up to the final printing temperature. The “absorbing heat” message simply means the firmware is stabilizing temperatures before printing begins.
If you’re interested in learning more about how extrusion and temperature workflows are handled in complex setups, resources like advanced print workflows can be helpful.
Hope that clears it up.