-273 on maestro e0temp pins
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can anyone confirm for me whether I damaged my board by improperly configuring a thermistor. it is reading -273c (open circuit). I have checked the thermistor resistance and the wiring continuity all the way to the board.
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What firmware are you on ?
As I have already reported this as an issue on RRF-3 with the latest DWC
When I switch back to RRF-2 and the older DWC the problem disappears
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I am running v.3 but I had no problems with a pt-100 for a year before that
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can you think of any reason I would damage the board. when I configured the thermistor i used the internal resistor setting for a wifi board which is 4700 instead of the maestro which is 2700.
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@ejarmo said in -273 on maestro e0temp pins:
-273c (open circuit)
I was under the impression (+)2000 was open circuit and -273 was a short circuit?
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@ejarmo said in -273 on maestro e0temp pins:
can you think of any reason I would damage the board. when I configured the thermistor i used the internal resistor setting for a wifi board which is 4700 instead of the maestro which is 2700.
That would not damage the board, neither would any other configuration error I believe.
If you measure the thermistor resistance right at the Duet thermistor terminals, what reading do you get?
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@ejarmo said in -273 on maestro e0temp pins:
2000c on Bed and Hot End
first, thanks for the quick responses. I have been trying to install a dyze high temp thermistor. I am new so I have been a bit lost. through careful reading of the installation resource I now understand that I need to tune the adc high and low gain settings because the sensor has such high resistance.
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@ejarmo said in -273 on maestro e0temp pins:
@ejarmo said in -273 on maestro e0temp pins:
2000c on Bed and Hot End
first, thanks for the quick responses. I have been trying to install a dyze high temp thermistor. I am new so I have been a bit lost. through careful reading of the installation resource I now understand that I need to tune the adc high and low gain settings because the sensor has such high resistance.
Which firmware version are you using? RepRapFirmware 3.2beta1 and later can do this tuning semi-automatically for you. But if you are running RRF 2.x, please note that upgrading to RRF 3.x requires significant changes to the config.g file.
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I am using v.3 right now but I will upgrade to the beta. is there any links for documentation on the tuning process which I could access.
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@dc42 said in -273 on maestro e0temp pins:
RepRapFirmware 3.2beta1
to answer an earlier question, at approx. 22c the sensor reads 4.25 meg ohms.
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update: v.3.2beta1 firmware update returns message "error, duet maestro IAP.bin not found"
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@ejarmo said in -273 on maestro e0temp pins:
to answer an earlier question, at approx. 22c the sensor reads 4.25 meg ohms.
this means your thermistor is broken or the wiring is broken
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I don't know. the documentation from dyze is that the reading is supposed to be 4066017.
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@ejarmo said in -273 on maestro e0temp pins:
I don't know. the documentation from dyze is that the reading is supposed to be 4066017.
at -20. are you in the arctic?
edit: sorry got dize and slice mixed up
post how you configured the thermistor
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@ejarmo said in -273 on maestro e0temp pins:
update: v.3.2beta1 firmware update returns message "error, duet maestro IAP.bin not found"
What firmware were you on before? You would have needed to update to 3.0 and then 3.1.1 before updating to the beta. With that missing file you may have needed to update to 2.05.1 first as well.
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this is confusing, if I put the sensor on a meter and it reads 4.6 meg ohms at room temperature. I had taken it the the heated bed to try to match any of the values in the dyze documentation, but none did. Regardless after several stupid mistakes I have firmware 3.2beta1 installed and a reading for the sensor adjusted on the high gain parameter so that it matches the print bed reading. should be close enough. all filaments will get a temperature print test and the sensor will provide rock steady temperatures. I haven't tested it yet but I wanted to thank everyone for the help. if something goes wrong now I will just give up.
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I should also mention thanks especially for the slice temp table.
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@ejarmo said in -273 on maestro e0temp pins:
I have firmware 3.2beta1 installed
Do keep in mind that it is an early beta and may contain all sorts of surprises. You may want to upload the 3.1.1 zip file just to stay on a stable release during troubleshooting to avoid any confounding variables.
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yes. for example the touchscreen on the printer now does not respond to any control elements. I am only able to go through the separate tabs but none of the items on any of the tabs will respond.
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If you mean the paneldue you will need to update the paneldue firmware to 1.24 and you will need to add a command to config.g to enable the paneldue.
M575 P1 B57600 S1
