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Rapido 2 thermistor not reading correctly (pt1000 on EBB42-with max31865)
After a full rebuild of my RR vc3.1 300, my thermistor now reads -237,5-ish (MINUS). I think it is caused by my own doing and am looking for some advise on how to proceed:
I am running a 3-wire hot end fan to monitor the functioning of this fan (curtesy of Andrew Ellis: https://ellis3dp.com/Print-Tuning-Guide/articles/useful_macros/hotend_fan_monitoring.html).
With the rebuild, I accidently put the fan's tachometer_pin wire in a 5V (probe) output of the ebb42 i.s.o. PB9. At first it all worked as before the rebuild. I heated the hot-end and got warnings for fan stoppage (as now is clear to me, as I did not wire it in correctly). I extruded some plastic and got a shutdown due to the hot-end fan not working (all as it should work!).
When I did a firmware restart I got a warning for the extruder being out of range. I lowered my min_temp and after that it started up but shows my extruder temp at high negatives.
I wired in a spare (identical) thermistor and that showed the same value.
I checked all the wiring and all seems fine.
So, I think I blew up something on the ebb42...?
- What are my options? (other than ordering a new EBB42-non Max31865, which I already did but needs to come from far-far-away)
- Can I wire the thermistor to other pins?
Appreciate all your thoughts and suggestions!
(to avoid the first reply being a ref to fix-my-printerRules and Discussion I added the logs)
Full setup (I think this is all):
- Ratrig VC3.1-300 enclosed
- Manta M8P (1.0)
- EBB42 Max 31865 V1.1
- Orbiter 2.0 with Orbiter sensor
- Phaetus Rapido 2.0 UHF
- Ratos 2.1 RC3
I am running a 3-wire hot end fan to monitor the functioning of this fan (curtesy of Andrew Ellis: https://ellis3dp.com/Print-Tuning-Guide/articles/useful_macros/hotend_fan_monitoring.html).
With the rebuild, I accidently put the fan's tachometer_pin wire in a 5V (probe) output of the ebb42 i.s.o. PB9. At first it all worked as before the rebuild. I heated the hot-end and got warnings for fan stoppage (as now is clear to me, as I did not wire it in correctly). I extruded some plastic and got a shutdown due to the hot-end fan not working (all as it should work!).
When I did a firmware restart I got a warning for the extruder being out of range. I lowered my min_temp and after that it started up but shows my extruder temp at high negatives.
I wired in a spare (identical) thermistor and that showed the same value.
I checked all the wiring and all seems fine.
So, I think I blew up something on the ebb42...?
- What are my options? (other than ordering a new EBB42-non Max31865, which I already did but needs to come from far-far-away)
- Can I wire the thermistor to other pins?
Appreciate all your thoughts and suggestions!
(to avoid the first reply being a ref to fix-my-printerRules and Discussion I added the logs)
Full setup (I think this is all):
- Ratrig VC3.1-300 enclosed
- Manta M8P (1.0)
- EBB42 Max 31865 V1.1
- Orbiter 2.0 with Orbiter sensor
- Phaetus Rapido 2.0 UHF
- Ratos 2.1 RC3
ratos-debug_20250210.zip665.85KB
Solution
if so, you can use run the thermistor wires directly to the Manta and insert the jumper there. Then you set it up on the manta and make sure you have pullup_resistor: 2200 in the config.
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