I have the Dibond Mendel90. All of a sudden the J-Head hotend has stopped working. Sadly I was not in the room, but it happened while it was printing. I came back and saw lots of extrusion prevented errors in pronterface. The hotend had stopped heating. How could I figure out what has broken? https://reprap.org/forum/read.php?292,631120,631120#msg-631120 Fri, 11 Sep 2026 13:25:43 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?292,631120,632130#msg-632130 https://reprap.org/forum/read.php?292,631120,632130#msg-632130 Diemex Mendel90 Fri, 26 Feb 2016 11:52:50 -0500 https://reprap.org/forum/read.php?292,631120,631207#msg-631207 https://reprap.org/forum/read.php?292,631120,631207#msg-631207
Does it show the correct temperature? If so use a multimeter to check there is 12V at the heater terminals when told to heat. If there is then measure the heater resistor it should be ~ 5.6 Ohm.

If it doesn't show the correct temperature the most likely reason is molten plastic leaking onto the thermistor and shorting it out.]]> nophead Mendel90 Wed, 24 Feb 2016 13:08:48 -0500 https://reprap.org/forum/read.php?292,631120,631120#msg-631120 https://reprap.org/forum/read.php?292,631120,631120#msg-631120 All of a sudden the J-Head hotend has stopped working. Sadly I was not in the room, but it happened while it was printing. I came back and saw lots of extrusion prevented errors in pronterface. The hotend had stopped heating.
How could I figure out what has broken?]]> Diemex Mendel90 Wed, 24 Feb 2016 10:48:18 -0500