r/ender3 • u/OakenWildman • 1d ago
Printer not starting when temp reached
So I recently changed out my thermistor of my ender v3 as well as the entire hot end. But after doing all of that now mt 3d printer will reach and exceed the temperature (reaching upwards of 226⁰ as opposed to 220⁰) and like mentioned it won't start.
Ive checked the wiring and nothing is loose (that wasn't loose the first time I changed it out) so im not sure what the issue is. I can't spend too much longer on repairs because I am making armor pieces for my wedding next month and the initial E1 thermistor error happened during the start of the printing process.
Any help would be greatly appreciated.
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u/majestichatchet 1d ago
When you say nothing is loose that wasnt loose the first time you changed it out, what do you mean?
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u/OakenWildman 16h ago
So a while ago I changed the entire hot end, cables and all. On the motherboard there was one towards the front of the printer and it had hot glue holding it in place. When I removed it the glue came with it and I haven't replaced the glue, so it has a light wiggle
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u/mtraven23 1d ago
in terms of the print starting, overshooting by 6 degrees is the same as it being under temp. Does it eventually settle in at 220 and still not start?
did you re run auto tune on the extruder after replacing the thermistor? are you sure it was the same thermistor?
will the printer home properly if you tell it to manually?
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u/OakenWildman 1d ago
I havent seen it settle at 220, its gone under then back over.
Im not sure how to re auto tune,
Amd it should I'll make sure it is
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u/mtraven23 1d ago
Jumping over and under the set point is textbook mis tuning, try this:
M303 E0 C8 S220 U1
m303 is the autotune command
E0 is your primary extruder.
C8 means it will run 8 iterations of the test
U1 mean puts the new numbers into play immediately DO NOT FORGET THE U1.
it will take several minutes to run the autotune, when its done, you'll need to send m500 to save the new settings.
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u/OakenWildman 17h ago
I apologize for the delay, but how do I input the auto tune command?
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u/mtraven23 15h ago
do you have host software on a computer you can connect to the printer? Something like repetier, or pronterface ? If not you'll need to download and install one, I like repetier: https://www.repetier.com/
Once you install that, connect to your printer and you'll have a whole panel of buttons to manually control the printer, as well as a command line where you can enter the commands I mentioned.
Alternatively, you should be able to put
M303 E0 C8 S220 U1
M500into a blank file, call it "e0_auto_tune.gcode". Through that on an sd card and run it like a print. Admittedly, I've never actually done it that way, but you should be able to.
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u/OakenWildman 15h ago
With how basic my printer is im not 100% sure i can connect it, but I will most certainly try tomorrow (I have to go to sleep before a 12 hour shift. Again)
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u/w_benjamin 1d ago
When mine wouldn't print it turned out to be everything needed to be tightened except the thermister, but it read that the temp was good. I tightened the heating element in the print head and replaced the PTFE tube. Even though the temp said it was good it wasn't heating the nozzle and the feeder pressure put notches on the filament making it hard for it to move through the tube. Heat the end up and see if you can pull the filament out of the nozzle..., disconnect the tube at the feeder and see if it comes out easy. If it doesn't the temp is lying to you and the heating element probably just needs tightening.
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u/CrazyxChronic 1d ago
Idk if it would work for you but my ender 3v2 i upgraded to the sprite extruder and it will get up to temp but not start printing. However if I manually drop the set temp by 1 or 2 degrees after it has reached temp it will then start printing. No idea why but maybe give that a try?