Rat Rig Community [Unofficial]•2mo ago

Reinstalled RatOS. Extruder now says it's 193c when it's cold. I forgot how to fix this issue.

Hi there. I have a rapido pheatus v2 with the screw in thermistor type. After reinstalling RatOS due to a bad SD card, I cannot look at my old printer.cfg file to see how to fix this issue. I had the issue a few years back but I managed to sort it. I have tried changing the thermistor type in printer.cfg however nothing changes. Any help would be appreciated! Thanks, Marc

Solution:

After poking and proding, I noticed after I took the jumper off that that one of the pins was quite wobbly. I gently touched it with my probe and it just fell off.. If I hold a wire from the non broken pin and try and hold it where the broken pin used to be, the temperature works correctly. I wonder if I can desolder the pins and install a new one? I'll take off tomorrow and have a proper look.

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34 Replies

TheTik•2mo ago

if you blow a heat gun or hair dryer at the extruder, does the reported temp change? What does your printer.cfg look like?

MARCOP•2mo ago

Yes the temperature does change. Give me a minute, I'll share my printer cfg

MARCOP•2mo ago

I have recently reinstalled rat OS. Besides a few adjustments, it's a pretty stock printer cfg file. 3.1 to 3.2h upgrade

printer.cfg

TheTik•2mo ago

Delete lines 147 and 128, put

sensor_type: PT1000

sensor_type: PT1000

on line 116

MARCOP•2mo ago

"MCU 'toolboard_t0' shutdown: ADC out of range Sensor 'extruder' temperature -124.728 not in range 0.000:350.000 "

TheTik•2mo ago

try going back to ATC Semitec 104GT-2? What hotend are you using?

MARCOP•2mo ago

Same issue, temp is at 193. I have another thermistor, new unused and it has the same issue.

TheTik•2mo ago

Where did you get the thermistor, and what kind is it supposed to be?

MARCOP•2mo ago

phaetus rapido v2, screw in thermister

MARCOP•2mo ago

https://www.onetwo3d.co.uk/product/phaetus-rapido-2-plus-thermistor-pt1000/

OneTwo3D

Phaetus Rapido 2 Plus Thermistor (PT1000)

Phaetus Rapido 2 Plus thermistor replacement

TheTik•2mo ago

rapido 2 is supposed to be pt1000 I thought, that's what I have yeah see, PT1000

MARCOP•2mo ago

The bottom one. I have it plugged into the toolboard. I never moved it. It was pt1000 before. Now after reinstalling the OS, it doesn't seem to work The only thing different from last week and now is the OS and everything is up to date. the BTT eb42 board has been reflashed as well

TheTik•2mo ago

A thermistor is just a variable resistor. If you've got a bad electrical connection anywhere from it to the board it'll read wrong okay, so its thermistor to toolboard?

MARCOP•2mo ago

yes but if I plug my spare one into the mainboard (manta m8p v1.1), and change the pinout for it in the printer.cfg, i get the same problem. It shows up as 193c when it's cold Could it be interference from something?

TheTik•2mo ago

I've got a 3.1, with a rapido 2 and an EBB42, so we should be able to figure this out This is RatOS 2.1 now, yea?

MARCOP•2mo ago

Yes

TheTik•2mo ago

Do you have this jumper in place? https://bttwiki.com/EBB%2042%20CAN.html#100k-ntc-or-pt1000-settings

MARCOP•2mo ago

I do have 1 other issue is, I cannot initialize the update manager. It says click refresh but it does nothing. But i'll leave that for another day Yes jumper is in place

TheTik•2mo ago

Hm. Might give this a review:

1. Flash image
2. Connect to hotspot
3. Setup wifi through configurator (and let it reboot)
4. Go to /config
5. Refresh update manager
6. at this point nothing should be invalid, all green. IF THAT'S NOT THE CASE stop here and post your moonraker.log
7. Update only the RatOS package(NOT configurator).
8. Update RatOS configurator (this takes awhile, if the mainsail output of the update process hangs, let it sit for 10 minutes and then refresh the page, Ctrl+Shift+R)
9. Restart moonraker service (click power icon in the top right of mainsail, click the refresh button next to moonraker under "service controls")
10. Reload mainsail (Ctrol+Shift+R)
11. Refresh update manager
12. "RatOS" should be gone from the list. Everything should be green and have several updates except RatOS configurator (ignore the klipper errors). If it's not, stop here and post your moonraker.log.
13. Click update all.
14. Done.

1. Flash image
2. Connect to hotspot
3. Setup wifi through configurator (and let it reboot)
4. Go to /config
5. Refresh update manager
6. at this point nothing should be invalid, all green. IF THAT'S NOT THE CASE stop here and post your moonraker.log
7. Update only the RatOS package(NOT configurator).
8. Update RatOS configurator (this takes awhile, if the mainsail output of the update process hangs, let it sit for 10 minutes and then refresh the page, Ctrl+Shift+R)
9. Restart moonraker service (click power icon in the top right of mainsail, click the refresh button next to moonraker under "service controls")
10. Reload mainsail (Ctrol+Shift+R)
11. Refresh update manager
12. "RatOS" should be gone from the list. Everything should be green and have several updates except RatOS configurator (ignore the klipper errors). If it's not, stop here and post your moonraker.log.
13. Click update all.
14. Done.

A simple thermistor reading wrong shouldn't be caused by software, specially as you tested and changing the temp of it DOES read a change, but your issue with the update manager has me spooked.

MARCOP•2mo ago

This is what I see.

MARCOP•2mo ago

moonraker1.log

TheTik•2mo ago

im assuming you've rebooted the whole machine

MARCOP•2mo ago

I will reboot now, see what happens rather than firmware So a complete reboot, still no change If i try to heat the extruder by the UI, the temp goes down rather than up

TheTik•2mo ago

thats ... wild. Strongly suggests it's thinking it is a different type of thermistor you set it back to PT1000 right?

MARCOP•2mo ago

yes could I check the resistance with a meter?

TheTik•2mo ago

yeah there are tables of resistance <-> temp

MARCOP•2mo ago

https://support.lpfrg.com/support/solutions/articles/11000102320-thermistor-resistance-table assuming this is correct, i should have a resistance 8783 ohms?

Home Customer support center

Thermistor Resistance Table

The Leapfrog Creatr HS is equipped with a total of 3 Thermistors: - Left Extruder (T1 Temperature Identifier) - Right Extruder (T0 Temperature Identifier) - Printbed (T2 Temperature Identifier) The Thermistor output table below can be u...

MARCOP•2mo ago

or larger smaller*

TheTik•2mo ago

If it's a PT1000 you should be closer to 1.1K ohms around room temp: https://www.sterlingsensors.co.uk/pt1000-resistance-table

Pt1000 Resistance Table

The chart below can be used as a referencing tool to find the relationship between a range of temperatures and resistance for Pt1000 RTD sensors. Temperatures in multiples of ten can be found down the left axis, whilst for more precise readings you must move along the horizontal axis between one and nine. For example the resistance of a Pt1000 a...

MARCOP•2mo ago

Right give me a bit of time, I'll go get my meter and start poking and prodding. I'll take the jumper pin out and make sure it's properly seated as well.

TheTik•2mo ago

good luck. It really sounds like you've got the right idea, just gotta keep pluggin away

Solution

MARC•2mo ago

MARCOP•2mo ago

Thank you for your help! Just to confirm, it is PT1000 in the sensor type. Now to figure out why I can't update anything but I'll get on with that tomorrow. At least I can move everything now.

TheTik•2mo ago

Success!

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Reinstalled RatOS. Extruder now says it's 193c when it's cold. I forgot how to fix this issue.

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