Error: heating fault on heater 1, temperature rising much more slowly than the expected 0.3°C/sec

[dani]

Hi,

I am getting the following error infrequently with my D300VS, E3DV6:

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Error: heating fault on heater 1, temperature rising much more slowly than the expected 0.3°C/sec

This occurs with the stock settings for the hotend, provided with the 1.19.2 firmware, installed about a week ago:

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M307 H1 A512.9 C267.0 D9.0 B0		; Heater 1 (hot end) use PID

It appears to be related to a bump in the fan speed -- when going from 70 to 90%, perhaps. The temp drops, but not below 10° below the set temp, and doesn't recover. What are your recommendations?

[UltiBots]

Make sure you have the silicone sock installed and reduce the fan RPM. The stock D300VS with 2 blowers at 100% = overkill. Consider limiting your fan max RPM to 50%. Part cooling is filament type and part dependent. Some need more, others less.

[dani]

Gotcha. The sock is pretty awesome, wish my other printers had one I'll turn down the fans a bit. I like them high, because I print some pretty wicked overhangs, and that cooling really helps, especially with PLA.

Thanks!!! I'll post back if reducing speed doesn't help.

[willy510]

try doing a heater calibration auto tune. This page will explain how to
https://duet3d.com/wiki/Tuning_the_heat ... re_control
It will teach the duet how fast your hotend heats and cools.

[waruta]

I just ran a tune and then ran M500 afterwards. It seems like its overpowered but I guess the autotune fixed it?

[UltiBots]

Being overpowered is not a function of autotune, rather a calculation of input power to the Duet and the resistance of the hotend heater. It is a warning that your hotend is theoretically capable of the calculated temp.