After much work, I finally my prusa i3 running beautifully. Some print quality issues, over hang drooping, adhesion issues, y'know, but working just fine. I was running a test with several objects on one plate, a bottle opener when one of the infill layers jerked off to one side, then the printer stopped entirely. There was a smell of burning plastic so i cut the power immediately. Lo and behold, the power terminal was burned out. See attachment. Just the outermost wire, though. The rest are fine. Did I overtax it or something? Or is this the result of bad parts? I ordered a replacement terminal that should get here in a few days, but I don't want to put it on until I find out what happened. I was running the printer with PLA, extruder at 190C and bed at 60C, well within the usual limits. https://reprap.org/forum/read.php?392,384840,384840#msg-384840 Mon, 14 Sep 2026 19:40:42 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?392,384840,732971#msg-732971 https://reprap.org/forum/read.php?392,384840,732971#msg-732971 I hope you find this post useful.]]> NeilRG Safety & Best Practices Sun, 25 Dec 2016 11:45:38 -0500 https://reprap.org/forum/read.php?392,384840,501817#msg-501817 https://reprap.org/forum/read.php?392,384840,501817#msg-501817 forums.reprap.org]

This looks like one of the fingers in the plug connector became loose and caused heating and subsequent failure. The wire damage is from conducted heat.

Personally, I am not a fan of these connectors for carrying significant current because of these issues. I prefer screw terminal barrier strips to avoid this issue.]]> itchytweed Safety & Best Practices Sat, 25 Apr 2015 22:30:01 -0400 https://reprap.org/forum/read.php?392,384840,385996#msg-385996 https://reprap.org/forum/read.php?392,384840,385996#msg-385996 REPRAP SQUAD Safety & Best Practices Mon, 21 Jul 2014 12:01:09 -0400 https://reprap.org/forum/read.php?392,384840,385070#msg-385070 https://reprap.org/forum/read.php?392,384840,385070#msg-385070 dexterousfolder Safety & Best Practices Fri, 18 Jul 2014 21:23:26 -0400 https://reprap.org/forum/read.php?392,384840,385056#msg-385056 https://reprap.org/forum/read.php?392,384840,385056#msg-385056 thejollygrimreaper Safety & Best Practices Fri, 18 Jul 2014 19:28:50 -0400 https://reprap.org/forum/read.php?392,384840,385050#msg-385050 https://reprap.org/forum/read.php?392,384840,385050#msg-385050 nophead Safety & Best Practices Fri, 18 Jul 2014 19:19:28 -0400 https://reprap.org/forum/read.php?392,384840,384872#msg-384872 https://reprap.org/forum/read.php?392,384840,384872#msg-384872 jbernardis Safety & Best Practices Fri, 18 Jul 2014 10:18:51 -0400 https://reprap.org/forum/read.php?392,384840,384856#msg-384856 https://reprap.org/forum/read.php?392,384840,384856#msg-384856 3D-ME Safety & Best Practices Fri, 18 Jul 2014 09:37:27 -0400 https://reprap.org/forum/read.php?392,384840,384840#msg-384840 https://reprap.org/forum/read.php?392,384840,384840#msg-384840 bottle opener when one of the infill layers jerked off to one side, then the printer stopped entirely. There was a smell of burning plastic so i cut the power immediately. Lo and behold, the power terminal was burned out. See attachment. Just the outermost wire, though. The rest are fine. Did I overtax it or something? Or is this the result of bad parts? I ordered a replacement terminal that should get here in a few days, but I don't want to put it on until I find out what happened. I was running the printer with PLA, extruder at 190C and bed at 60C, well within the usual limits.]]> dexterousfolder Safety & Best Practices Fri, 18 Jul 2014 08:56:31 -0400