Changing pt100 to standard thermistor
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no sorry, i probably didnt explain, i am using the web ui, all the time,and running these commands via the console in the web ui, but i thought it was a simple M500 via the console in web ui to save it, and it doesnt
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Yes you have to edit config.g and add M501 at the end.
As I said, M500 saves SOME settings (like PID tuning or other measured values) to the file config-override.g. And M501 loads that files.
https://duet3d.dozuki.com/Wiki/Gcode#Section_M500_Store_parameters
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@Atraedes said in Changing pt100 to standard thermistor:
gone into system in the web ui, found config.g, opened and typed M501 at the end of the file, and its asking if do i want to reset the board and apply the update?
ok thanks, so to try solve these spurious heating faults, run my pid tune, after it shows results then go into system in the web ui, into config.g, M501 at the end of the file, and reset the board and apply the update?
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@Atraedes said in Changing pt100 to standard thermistor:
Warning: Heater 1 appears to be over-powered. If left on at full power, its temperature is predicted to reach 692C.",
That's not a heater fault. It's a warning.
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PID tune, send M500 in console, add M501 to config.g. done.
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awesome thanks, much appreciated
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oh my good lord i am losing my mind...I've done everything, seemed fine, heated up hotend to 200c to do a test cube, and "M501
Warning: Heater 1 appears to be over-powered. If left on at full power, its temperature is predicted to reach 612C.", and then "Error: Heating fault on heater 1, temperature excursion exceeded 15.0°C", and it cools down the hotend. I know the first is a warning which i could live with but it then goes into error! Sorry I know i seem like a noob and keep asking questions but i dont get it lol, cables seem fine and ive rechecked everything, do you think there may be another fault elsewhere or is it likely the cables? -
post a picture of the temperature graph.
also do you have the silicone sock on?
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Yes got a sock on, and thanks for your assistance -
sorry did you want me to rest the hotend and heat again first?
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reset the hotend even
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when the error occured
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it happened when i was heating the hotend to 205c to do a test cube
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I've got it heated to 200c now and for the last 15mins or so and it seems ok, but this is probably the 3rd or so time its had a hotend error since i made the changes earlier today
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ok so its just done it again, temp spiked instantly up to 1600, then 1k, and lower but all within seconds, and now its almost cold...
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can i save the set up files and perhaps default the board? perhaps flash it or start again? or will that not change anything?
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If it spiked to 1600C that suggests either an intermittent short circuit, or a short between the heater terminals and the thermistor wires, or ESD. These same causes would explain the error report "last error: short-circuit in sensor" you had when using the PT100.
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thanks, i guess you're right as i cant find any other fault i can see, so if the thermistor and heater terminals touch at the heater block that would also cause a short?
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@Atraedes said in Changing pt100 to standard thermistor:
thanks, i guess you're right as i cant find any other fault i can see, so if the thermistor and heater terminals touch at the heater block that would also cause a short?
It's not uncommon for heater cartridges to develop shorts between the element and the case, which connects the hot end metalwork to VIN. If you also get a short between the temperature sensor and the hot end metalwork, that will short the sensor to VIN.
If you have a connector in the sensor cable, check that connector. Sometimes a single strand of wire escapes the crimp and touches the other one.
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thanks, i will check that now, i only crimped that ruddy jst connector earlier and now that you mention it that seems the likely cause, many thanks
