Thermocouple error?

[Andrew_F 0]

Hi All,

 

Resurrectng a UM3 extended with latest firmware, 5.3.0.20211003.

Two new printcores, the one in question has done 18 hours, mainly printing benchies to troubleshoot.

Early on, found out that the printcore front fan had failed prior to me buying it last week.  So, core may have overheated, but max temp recorded in the settings is 260 degrees, not overly hot

 

Have problems with random changes in print quality.

I logged in to the printer via IP for the first time today and had a look at the temperature chart.

Are the spikes in this a thermocouple error?

 

Regards,

A
 

Edited April 20 by Andrew_F
more info

[glx 27]

You could check if probably the path above the nozzle is partially blocked because of the previously failed cooling fan. 

 

Btw. I have a printcore that says this (works fine tho): 

[Andrew_F 0]

Hi glx,

 

Thanks for the reply. did a hot and cold pull prior to posting. All clear.          

 

Also ‐ wierdly my printcore shows a max temp in the 200s     

 

Appreciate your input.

 

I'm trying to troubleshoot a few things on this machine with partial success.

 

A

Edited April 23 by Andrew_F

[Torgeir 243]

Hi @Andrew_F,

 

To answer this simple, -there is an open (rupture) in your temperature wiring!

When this happen, the the temperature go sky high..

 

"How high, depend of the internal circuit after the "PT100" input!"

 

So, there is a broken wire, some place between your nozzle and the feeder!

 

This is where the wiring bundle always move/bending, -just look here.

 

If this was a permanent failure, it would fail all the time, but this is intermittent -so a now and then connection..

 

The wires always on a move, -suffer the most, -go figure.

 

Thanks

Torgeir

[Andrew_F 0]

Thanks Torgeir,

A brand new print core.

I'll check the terminals and ensure the wires are in properly.

A