Temp error-help

[ryan-sutherland 0]

I've had my ultimaker2 about 1 month printed about 2-3 rolls of pla. Recently having trouble with temp error messages with aborted prints.

I've been told by "support" to take the heated bed apart and check the wires as well as check some resistances. I think it is all is ok :

3.7 omhs resistance between screws 1 and 2.

108 omhs between screws 3 and 4

108 ohm on either side of the small rectangular area (resistor?)

I've also taken the board off the bottom and checked the connections there. I reassembled it and it printed for a little while with the same error.

Please help...what's next?

[illuminarti 18]

Do you remember what the exact error message says?

 

[ryan-sutherland 0]

I believe it is "ERROR - STOPPED Temp sensor BED"

Then the wheel glows with multiple rainbow colors.

 

[illuminarti 18]

Did you check the resistances at the electronics board end of the wires?

Also try moving the bed up and down, and wiggling the wires a bit, and see if you can get the readings to change.

 

[ryan-sutherland 0]

I think it is odd how intermittent the error is. I'll check the resistance with movement. So it must be a short in the wire or something? Do I need to take off the protective sleeve and inspect those?

[ryan-sutherland 0]

Based on this:

http://www.fablab-regensburg.de/wp-content/uploads/2014/04/Ultimaker-2-Nozzle.pdf

Should I be taking my extender apart? This sounds like it could be my problem. I am having clogging issues as well but I didn't think they could be related. I believe Occam's razor may apply.

[gr5 2,172]

This is not related to the print head. It's the print *bed*.

There is a 4 pin connector soldered to the bed. Usually the problem is in one of 3 places:

1) On the 4 pin connector one of the screws is loose or a wire isn't in properly.

2) The 4 pin connector has a bad solder joint - this is impossible to see so I recommend reheating all 4.

3) Underneath the UM2, remove the larger cover and check the wires on that end also.

The 108 ohms is the PT100 part which you can google (Pt stands for platinum). 100 implies 100 ohms at 25C. 108 ohms implies typical room temperature. It looks like a resistor but it's the temperature sensor.

The problem is with the wiring between the PCB under the UM2 and that part. Like I said 90% of the time it's at one of those 3 places above. I'm guessing #2.

 

[gr5 2,172]

I am having clogging issues as well but I didn't think they could be related.

 

Not related. The print bed can be at any temperature and it won't affect clogging or underextrusion issues. We should tackle that on another thread. Many people have underextrusion issues and there are many possible causes.

 

[ryan-sutherland 0]

put a new bed on a works like a charm. Yeah um2.