MINTEMP and MAXTEMP errors

[warrenmiller 0]

hi - recently recieved a pressembled ultimaker and just getting into it (loving it btw).

Worked ok for the first 5 prints or so but since doing the Marlin upgrade (or possibly a new PLA batch) have been getting both MINTEMP and MAXTEMP errors - am thinking it must be a sensor because the temperature ranges from between 10 and 400+ degress in a matter of seconds.

uploaded a video of it failing here:

http://www.blockphoto.info/_temp/ultimaker_error.mp4

any ideas?

thanks in advance for help!

warren

 

[illuminarti 18]

Warren -

Welcome! Glad you are loving the printer!

This does indeed sound like a temp sensor problem - most likely a loose connection. Check the connections from the thermocouple to the board on the printhead (thin wires screwed into the terminal block), and also check that the cables are all properly seated into the connectors on the printhead, and onto the electronics board under the printer.

If you are getting wildly swinging temperature readings, it sounds like a problem with the thermocouple or the associated circuitry. The firmware will throw errors if it gets readings that are out of range, and shut down the heaters - which makes sense to prevent damage from the heater running constantly without proper feedback controls.

It's unlikely to be related to the PLA, and even the firmware isn't likely to be the primary cause - although newer firmware may be doing a better job of detecting the problem. (Unless you built your own firmware and have the temperature settings wrong somehow?) Which firmware did you use to update your printer?

 

[warrenmiller 0]

hi - looks like it was a loose connection - wiggled the wires around a bit and checked the connections and it works fine now. Will do some more tests today on longer prints and see if it comes back.

thanks for your help!

warren