E3v2 wild temperature fluctuation when printing.

[mild sundial]

While printing PLA at 200C, temp varies between 194-206 and sometimes jumps by 3 degrees.

just replaced the thermistor and did a PID tune. It was acting this way before the new thermistor, so I thought it was the old thermistor. Then it started acting like that again. So I did a PID tune after forgetting to do it. PID tune with 7 cycles, set the new values, saved them, started printing, same shit.

Then I boiled some tapwater, shoved the thermistor in, showed 104C stable, with 1 degree drops to 103.

I am thinking my mainboard is faulty at this point, I still will try a firmware update, and print test again, maybe the screw was too tight holding the thermistor.

[brazen lion]

AI Help

It sounds like you have already taken some good troubleshooting steps. Trying a firmware update is a good next step to rule out any software issues. If the problem persists, it is possible that there could be a problem with the mainboard. Do check that the thermistor is securely in place and not being squeezed too tightly by the screw. If you continue to experience temperature fluctuations after taking these steps, it may be worth contacting the manufacturer for further assistance or considering a replacement mainboard.

WARNING: This response is AI generated and may contain errors.

[brazen lion]

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[mild sundial]

any advice?

[true dirge]

could be the heating element itself

causing fluctuations in temp

maybe firmware tho

[mild sundial]

i mean, i honestly dont want to risk it. I was thinking of upgrading most of the stuff anyway, gives me an excuse to get an skr mini v3

[true dirge]

id just update firmware and go from there

is it affecting your prints?

[mild sundial]

not yet but there is a possibility of thermal runaway triggerring, it has done that before because of the fluctuation

[true dirge]

your thermistor might be in the wrong place

i just replaced my e3v2 hotend with a volcano hotend, and when i was transferring the thermistor it gave a warning that the temp was too high

all i had to do was reposition the thermistor and it works fine

[mild sundial]

i mean, how, there is only 1 hole it can go in

[true dirge]

might not be all the way in

[robust fiber]

this can also be your PSU dying. Most E3 styles come with a "lowest bidder"-quality PSU unfortunately

[mild sundial]

i mean if thats the case, ill just sell the entire printer. and build a voron trident with proper quality parts. much less painful

[robust fiber]

had to replace the PSU on my E3 at some point, too. MeanWell LRS350-24 is reasonably cheap and good quality

[mild sundial]

oh yeah its not that expensive. good to know

Also is there even any other option than MeanWell? iirc they were the "proper" PSU manufacturers (excluding custom PSU ODM's)

[robust fiber]

your call. Though E3s usually don't perform horribly well on the used-printer market (for some weird reason...) so yeah, might cut your losses, or swap the PSU and have at least a backup printer for when you get your trident

[mild sundial]

thank you for the advice

[robust fiber]

at least none that are anywhere near in legitness-vs-price ratio that I know of

[brazen lion]

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[mild sundial]

solved after another PID tune and reseating thermistor

[stark aurora]

(type ?solved to close the channel)😁

[mild sundial]

?solved