MAJOR Thermal issues with 2 brand new Ender 3 Pros
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I've had 3 Ender 3 Pros - 1 of them is perfect, rock solid and prints like a champ. The other two have the EXACT same issues, had them with the first one, returned/replaced it and the 2nd is doing the EXACT SAME. This issues are thermal heating and thermal runaway. Here's everything I've done:
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First, working unit is running the out-of-box firmware (again it's perfect)
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I've tried 5 different firmware - the CR/BL Touch from the site (I have that), the one without that, the one from the SD card, one I custom compiled (Marlin 2.0) and one support sent me (2.0.6.4 I think). They ALL have the same problem
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When I flash back to the stock firmware from the SD card the display is all screwed up - I can still sorta make it out but all other firmwares are fine save for this one. Same happens if I get it off the site
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I've set fan speed to 0%
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Run an auto PID (with the latest firmware)
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Here are a number of videos of it happening during a print - you can see it starts to dip in temp, then starts to come back but then it fails
https://www.dropbox.com/s/opignptruaa0gc3/2022-05-03 09.30.30.mp4?dl=0
https://www.dropbox.com/s/g16tz2nptrs2kpi/2022-05-02 19.57.33.mp4?dl=0
https://www.dropbox.com/s/78ew770coqg06za/2022-05-02 19.46.06.mp4?dl=0
https://www.dropbox.com/s/hks4aylxms2wz91/2022-05-02 19.27.18.mp4?dl=0
https://www.dropbox.com/s/zcpzp5qlmzptfhi/2022-05-02 19.23.12.mp4?dl=0 -
As it's sitting next to the working one I ran a power cord to a different circuit to make sure it's not power related somehow.
I'm at a total loss - I need these things to work for my business and have lost over 40 hours just trying to make this thing (and the previous one) print. The store where I bought them is an hour away so I really don't want to make a 3rd trip there.
HELP!
~Ross
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I am having the same type of issue on an Ender 3 v2. Can't do print out of the box....just get a lowtempature warning and then failure. Did a pidtune but that doesn't seem to help either. Temp gets to its starting point, runs for a few layers and then just starts going down and never recovers until the failure. Its almost like the power supply cant handle the load from heating both the bed and nozzle.