Ender 3 Pro: "THERMAL RUNAWAY: E1 PRINTER HALTED" error...

[Rax]

This is almost surely not the right place for this post, but I have no idea where else to go (Creality's own forum seems pretty languid...) and hoping long time users may have some good insight.

I've been getting consistent "THERMAL RUNAWAY: E1 PRINTER HALTED" errors starting this morning, always occurring about a few minutes into the print (barely at the second layer of the base), at what feels like the exact same time.

I was under Marlin 1.0.1, and upgraded to 1.0.3 (which I believe is the latest for my motherboard, v4.2.2).

Any ideas?...
Thanks.

[JohnG]

If one of your thermocouples is loose, or the connection intermittent, this could trip the protection. Sometimes this can occur once things heat up enough, or if the cable or connection is poor, it could occur once the hot end or bed moves enough to put strain on the cable. It could be a combination of the two.

This describes it pretty well: https://3dprinting.stackexchange.com/questions/8466/what-is-thermal-runaway-protection/8467

This is just a pointer in the direction where I think the problem is. No guarantees, etc...

Good luck,
John

[Rax]

If one of your thermocouples is loose, or the connection intermittent, this could trip the protection. Sometimes this can occur once things heat up enough, or if the cable or connection is poor, it could occur once the hot end or bed moves enough to put strain on the cable. It could be a combination of the two.

This describes it pretty well: https://3dprinting.stackexchange.com/questions/8466/what-is-thermal-runaway-protection/8467

This is just a pointer in the direction where I think the problem is. No guarantees, etc...

Good luck,
John

John - thank you very much for pitching in. I managed to detach the fan shroud to look inside and tightened the thermistor (hopefully not too much...) and it seems this made the issue go away. Not sure why this was happening after a certain time of running, maybe heat and dilation of parts contributed to triggering the issue from a certain point on.

I'm printing! 

[thm_w]

Yes the constant heating and cooling cycles will tend to loosen up parts. Differential thermal expansion, etc.

[ivaylo]

I get this on a Prusa Mini when it’s just too cold where I print. Taking it to a warm place always fixes the problem. Not sure where you are, but considering it’s January it may be relevant.

[BatGroupCraft]

Doesn't the thermocouple display maximum if the two wires are touching completely and it displays minimum if the wires are loose? I'd say the metal screw that holds the thermocouple is touching both it's pins at the same time, intermittently, because of dilation coefficients and stepper impulses, else the thermocouple is faulty, change it they are cheap.

[cdle_net]

这个问题我遇到过。
如果硬件没问题，就检查打印设置。
cura软件的起始温度和打印温度设置要一致，第二层开启风扇的速度不要100%，改成50%。
意义就是把温度不要突变。有些硬件的PID性能不一定合适或没设置好。

I have encountered this problem.
If the hardware is OK, check the print settings.
The starting temperature of the cura software should be the same as the printing temperature setting, and the speed of turning on the fan on the second layer should not be 100%, but 50%.
The meaning is to keep the temperature from changing. The PID performance of some hardware may not be suitable or not set properly.