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Print Core does not heat up more that 4 deg.


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Posted · Print Core does not heat up more that 4 deg.



I have a new...ish print core that's about 1 year old that I haven't used much. Lately my UMS5 started to act up with the dreaded ER34 error (print head communication error). I followed the tutorial and disconnected the printhead cable and connected it again. This helped. However, ever since my print core in question (AA 0.4) won't heat up any more. Is there a way to troubleshoot this further? I have switched to another print core and it heats up fine so the print head is not at fault. I have switched the "broken" print core to the slot 2. and it does not heat up - so it is definitely the print core itself.

What's weird - when I manually want to heat up the print core, I can only go up to +4 C°. Pressing on the + button on the printer display does nothing. Also when I start a print, the temperature remains at 31 C° and the feeder tries push filament through the cold print core. I wonder why the firmware does not intercept the low print core temperature and stops the print.


That's not the whole story though. After reconnecting the print head cable I updated the firmware to the latest stable 6.5.x. I am not sure if the problems that follow were introduced by the new firmware but I noticed that every new print failed during active leveling with the message: "Difference between detected height of both print cores exceeds realistic values".

So I went on and disabled active leveling. I know that's not supported but I followed this post. That's when I found out that the one print core won't heat up. After that I enabled active leveling again.

Right now I am using an older print core and it works fine. No print head connection errors, no active leveling errors.




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    Posted · Print Core does not heat up more that 4 deg.

    Apart from cleaning the connector pins on the printcore pcb there is not much you can do about the printcore. And of course make sure the printcore is fully inserted into the slot but I assume you did that.

    What I find a bit strange is that you don't get a heater error when you try to manually heat the core - how long did you wait?

    You may also try to re-install the same firmware again to overwrite some potential typos from the active-leveling-disabling-procedure.

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