Temperature swings wildly on primary extruder
Re: Temperature swings wildly on primary extruder
It is a short to the hot end thermistor. Unplug thermistor plug and ohms test at said plug on the rambo board . Move the wiring around to thermistor while watching for the ohms reading to fluctuate as a guide to narrow the shorted area down . Hope this helps.
Re: Temperature swings wildly on primary extruder
IIRC, the thermistors used in the M2 should read about 100k ohms at room temp.pyronaught wrote:What should the thermistor resistance be at around room temp? I'm reading values in the 200 ohm range.
200 is DEFINITELY not optimal!
Dale
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pyronaught
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Re: Temperature swings wildly on primary extruder
I would expect a short to read zero though, and also not have its value change with temperature the way it is doing.
Now it's not reading anything, so the short became an open circuit. Whatever happened to it, it wasn't repairable because it happened internal to the metal can the thermistor is permanently mounted in. At least it's just a $6 part from MakerGear.
Now it's not reading anything, so the short became an open circuit. Whatever happened to it, it wasn't repairable because it happened internal to the metal can the thermistor is permanently mounted in. At least it's just a $6 part from MakerGear.
Experience is what you get when you didn't get what you wanted.