UM3: temperature drops 30°C each minute while printing

[Dreidee 0]

Hello there,

I am a happy UM3 customer, but since 2 days I have huge temperature drops on my right extruder.

The left one (material 1) is completely ok, the right one (material 2) shows continuous temperature fluctuations of up to 30°C each minute or so, making my prints all unusable.

I tried with different print cores, and with different materials.

I checked if the connector in the printhead is connected, all fine. I tried pushing the cable a bit further down into the print head and fix it with tape (read it elsewhere), but didn't help. I use Cura 3.1 (stable version) as well as the current stable firmware.

Is this broken hardware or a software bug?

Thanks a lot,

Chris

[kmanstudios 1,120]

Something may be wrong with your cable since it is happening with more than one core and material.

I would definitely check with your reseller or support people and see if you can get a new cable.

That should not be happening.

[cjs 34]

I also noticed temperature drops of the right extruder. Only 10 degree drops but still. Screenshot of the temperature graph running firmware 4.0.

To me it looks like the power management is somewhat off. The IMHO undersized power supply probably doesn't help.

I remember reading that Ultimaker changed a few power setting with 4.0. Maybe @maht or another UM employe can help us to fix the problem?

[cjs 34]

As the most active UM3 firmware developer @robinmdh in this forum. Do you mind taking a look at this problem? Any advice or explanation on whats happening?

[FormFaktor 0]

Hi there. Same problem here. I belive its because of this new firmware update. Will try older one or beta and let you know if it helped. 

Edited December 27, 2017 by FormFaktor

[Msuurmond 28]

Looks liekt he same as: 

 Check the new Test version firmware for a fix.

[KindaichiShota 1]

I am also having the same problem, please help  

[cjs 34]

Thank you @Msuurmond for linking the topic

@KindaichiShota I think your/my problem is partially fixed in the new test firmware version 4.1.20171222