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Temperature calibration

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I think the printer has go it's heat sensor somehow off, as it is insisting that room temperate is 26 C, which it isn't, and while I don't have a thermometer than can check if it goes to 260, I can see that at "260" it can't extruder properly plastic that it used to do fine at 230.

Is there a way to check more precisely, or calibrate the machine?

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This is probably a UM Original. On the UM Original there is a tiny circuit board on the print head. The voltage coming from that circuit board should be 0V for 0C and 5V for 500C and linear in between. So at 20C it should be at 200mv.

Now you can determine if the problem is at the head or somewhere else.

 

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Hello,

 

Let me bounce on your comments.

 

You say that the temperature fluctuates. This is true when it is on the map. And it is cfaux, at home when I measure the reistance of the PT100.

 

I deduced that indeed the connections could be involved and not only. I raised the issue of sampling. It seems that the latest version of Marlin in RC7 corrects "a little" this case.

 

After that, I do not know. I have not needed to change the probe, though ... it's not envy that I am missing.

 

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