Testing firmware should be quite stable, every printer in our office runs the testing version. Release shouldn't be far off. The 3.7 to 4.0 took long due to focus on other projects, and integration of Cura Connect.
ER15 is almost certain related to the print head cable. Due to the cables not properly clamping in the top of the print head, cause communication to fail with the printhead. A quick fix is opening the top of the print head and putting some tape around the cable where it is clamped. So it's properly clamped, and no longer pulls on the connector itself.
It gets worse over time due to the cable compressing on the only part where it is clamped.
As you can imagine, this is quite a big problem for us, and we only just finished our investigation into this problem. Which I took part in, which is why I know so much about the cause. I don't know how support is handling the problem right now, due to that being out of my usual work area.
We're also improving the cables, which where not exactly in specs, and the clamping, which could have been designed a bit better. To fully solve the ER15 issue. But that's all mechanical, in software we already did all we could.
Recommended Posts
cjs 34
@tomnagel @Daid Correct, thats bed leveling. Thinking about it,the behaviour makes sense. I believe I have seen the same graph not related to bed leveling, but I wouldn't bed my UM3 on it ;D
@Daid Any kind of timeframe for the full solution and the release of a new firmware? I ask because the update from 3.7 to 4.0 took quite a long time ( 6 month ?! )
How stable/safe is the test version?
May I ask you to look at the temperature graph below? I marked the ER15 spot. It happens on 3 UM3 running the firmware version 4. The printer is configured to print PLA and Breakaway. The fourth printer, which runs firmware 3.7 doesn't have the problem. It happens on print slot 2. It's not the fault of the print core as swapping in a new one or swapping print core 1 and 2 doesn't solve the problem. I measured all my print cores and they are all about 28 Ohms, which to other information published is out of spec. 3+ bad print cores seems to be very unlikely as I think Ultimaker has good QC.
I would also like to mention that I don't like the programmed error behaviour of the UM3.
Behaviour: Everything stops and the UM3 can only be recovered by a power cycle and the print is basically fused to the nozzle because the bed didn't go down a few millimeters.
Do you want me to open a new topic for the error as it may not be related to the problem?
Link to post
Share on other sites