I have a Bukobot Mini Green and we had an unforeseen issue arise after adjusting the Y axis to account for a slight lean in our prints.
Unsure of what happened exactly, our HBP suddenly started reading room temp incorrectly @ 189C, even when unplugging the thermister from the board. I can’t really get a good read on the connector end of the HBP thermister wire, but we get ~100k from the thermister.
It sounds like it’s gone open circuit. Is the connector soldered to the wire or crimped on?
@Whosa_whatsis you’re the most familiar; I’m sure you can provide the best help here. Sound like simply a thermistor break?
Yes he could, I was just hoping not to bother them on their way back from NY Maker Faire
Could have shorted the thermistor to 12V, blowing up the input on your Arduino, which then gives a fixed false reading.
I had shorted my thermistor to ground because I was a ding bat and didn’t insulate my solder joint from my aluminum hbp. But you said you removed the thermistor… Like @Stuart_Young said, I’m curious what state the ADC would fail in. If the thermistor is simply a resistor, the input on the Arduino should be a voltage bus and an analog in, right? So you should be able to probe to verify voltage on one side. Then short the analog in pin to ground and see what value. Depending on what the thermistor resistor values can be, I’m thinking that you can just short the 2 input terminals together to get another reading, but putting a resistor would be a safer bet, to avoid overcurrent. This should give you another reading. This will prove the ADC is at least alive. From there, I’m at a loss. Good luck though
