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Copper heat blocks and heater calibration failures with 6.4.0-RC
It seems running heater calibration is hit or miss when using a copper heat block. I accidentally reran it (I needed to run other tests) and it kept failing. This creates an annoyance because the printer will display nag screens that the calibration is not complete when turning on the printer and I have to hit "OK" to continue. It will also do the same before starting a print. To make it pass I swapped out for an aluminum heat block.
I haven't dug into the firmware source code yet, but if I were to guess, the PID settings in firmware are calibrated to an aluminum block and the heater test is probably testing for ramp up time which then fails. Otherwise, the copper blocks work fine.
Posted : 13/10/2025 5:26 pm