Occasional unstable thermistor reading
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Hi,
I started having some temperature reading problems on my hotend. Most often the temperature is read correctly, however, in some occasions there is a spurious reading, which can create a heater fault. An example of the spurious reading is shown in the picture (this one didn't halt the printing process but others can).
The problem is very random, it may or may not appear on a print (the last one appeared at 4 hours and 30 minutes into a print job). I've read the page about spurious temperature errors and the only valid option for my case seems to be noise but I have no idea about its source.
What should I do? I cannot trust the printer in its current form, as prints can fail randomly. Should I change the thermistor ?
Thanks...
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The most likely cause is an intermittent short between one of the thermistor wires and the hot end metalwork. If it is a cartridge thermistor then it could be caused by an intermittent short within the cartridge.
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Thanks. In either case, the solution seems to be changing the thermistor then....
