temperature failure in Cura 14.03

[missspiff 0]

I have a problem with the temperature in Cura 14.03 (and now also in Cura 14.01) all of a sudden the temperature is going up to 250 and somethimes up to 270.

My Um1 was doing fine but now I have a problem. Does anyone else has this problem. I'm connected with USB because I'm still waiting for Ultimaker to deliver my ulticontroller :mad:.

Pls advice....

 

[gr5 1,075]

There are several possible causes but the most common is a bad connection in the temperature wire at the top of the print head.

On the print head of the UM Original there is a small circuit board. One of the wires coming off that board goes up along the bowden cable back to the PCB. The wire there at the top of the head is usually the problem. Try pushing the head around to the 4 corners while power is off to the nozzle and see if the temperature jumps suddenly. Also try pushing and pulling a bit on that wire. It's supposed to go through the black delrin (delrin is a kind of plastic) "F" shaped strain relief. Does it? There is an extra, identical cable there for the second extruder that you probably don't use. You can swap to that wire and then also swap underneath so that you are using the new cabling. And make sure the cable goes through the strain relief this time.

There are other possible causes. The second most common is having the thermocouple wires that go from the heater block to that circuit board being too close to the fan wiring. When the fan is on - especially when it is not at 0% or 100% the wires can act like an antenna and broadcast noise into the thermocouple wire which is sensitive. The fix is to keep the wires at least 10mm apart until they get to that chip on top of the print head.

edit: I mean keep thermo wires 10mm from fan wires.