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Thread: Anet a8 Def error ohm reading
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09-08-2017, 03:13 PM #1
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Anet a8 Def error ohm reading
Hi!
I just finished building my Anet A8 printer. The first print worked fine, I set it to "cooldown", then unplugged it after a few mins. Now, a few hours later, it will no longer print. Both temps say "def".
I have:
Soldered the heatbed wires on the heatbed
Re-soldered the thermistor on the heatbed
The ohms are as follows: Extruder; 110-120k ohm
Heatbed: 55-59k ohm
(unconnected)
When the heatbed is connected to the mobo, it measures 5.7k ohm. The extruder measures 16-17ohm when connected.
Any suggestions?
Cheers
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09-08-2017, 03:41 PM #2
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Just did some more troubleshooting...
Soo, new firmware. Now it shows: 364C extruder, 36C heatbed. The heatbed is a bit too high, but it responds to heat (goes upp to 43C when I hold the thermistor). When I plug the extruder thermistor into the heatbed socket, it shows 24C, and goes upp to 34C when I hold it. Now, to the odd part, the extruder always shows 364C, no matter if it is plugged in or not.
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09-08-2017, 04:24 PM #3
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Also, "long" beep when I put the multimeter on both pins on E_T; but not on the others.
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09-08-2017, 04:52 PM #4
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Seems like its C47 that is broken, from what I can tell. I assume that is a capacitor? Can I switch it for any capacitor, or do I need a specific one?
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09-08-2017, 05:03 PM #5
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I went ahead and bypassed it. Started upp, but now both extruder and heatbed are showing wrong temps.
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09-08-2017, 05:22 PM #6
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I dont know how, but new capacitor did the trick. Both temps now working!
THanks for the help!
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09-09-2017, 05:02 AM #7
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Stopped working again :/
I have to check, the ones marked in yellow are capacitors, right?
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09-09-2017, 03:24 PM #8
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I solved it! Removing both those capacitors, and not bridging, did the trick. Just two blank spots, where I had circled in the picture.
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09-08-2017, 03:43 PM #9
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Could that help?
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09-08-2017, 04:14 PM #10
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Reflow done. Now extruder says 295C. Maybe less shorting, or something like that? Ill try another reflow now.
Do bed magnets deteriorate.
04-29-2024, 01:35 AM in General 3D Printing Discussion