Bug: Prime blob way too big after aborted print (UM3E)

[macio 0]

Hi,

 

just found another bug that I would like to share with you.

 

Reproduction steps with Ultimaker 3 Extended connected via WIFI):

- Start print via Cura over Network
- While printing, pause print via Cura
- Abort print via Cura
- Clear build plate and select "NO" retry on printer panel
- Start another print via Cura over Network
Problem:
The printer makes a way too big prime blob that will cover the hole nozzle in filmament (about 4 times the size of a normal prime blob).
The extruder will mill into the filmament.

 

Would be great to get a fast fix for this issue. This is the 8th bug that we have seen on our Ultimaker 3 Extended within 3 month in occasionally usage.

[Marco_TvM 34]

1 hour ago, macio said:

Hi,

 

just found another bug that I would like to share with you.

 

Reproduction steps with Ultimaker 3 Extended connected via WIFI):

- Start print via Cura over Network
- While printing, pause print via Cura
- Abort print via Cura
- Clear build plate and select "NO" retry on printer panel
- Start another print via Cura over Network
Problem:
The printer makes a way too big prime blob that will cover the hole nozzle in filmament (about 4 times the size of a normal prime blob).
The extruder will mill into the filmament.

 

Would be great to get a fast fix for this issue. This is the 8th bug that we have seen on our Ultimaker 3 Extended within 3 month in occasionally usage.

It would help to get the logs when this happens, using System -> Maintenance -> Diagnostics -> Dump logs to USB and send them either by using something like WeTransfer or attach them.

That way we can see which firmware is being used (missing in the report) and the state of the printer logic being used.

 

[macio 0]

Firmware version 4.2.5.20180102
Cura version 3.1.0

The printer is currently in use. Maybe I can download the logs tomorrow. 

[Marco_TvM 34]

 

20 hours ago, macio said:

The printer is currently in use. Maybe I can download the logs tomorrow. 

 

That is fine, no rush.

[macio 0]

@Marco_TvM Send logs as PM

 

[Marco_TvM 34]

Thanks, checking ...

[macio 0]

Update:

Problem is still reproducible.

It also occurred if we pause and abort the print directly on the printer and not only if we pause and abort the print via Cura.

The attached picture shows the big prime blob.

 

[Daid 306]

Update on this one. We've found the problem related to abort and too much or too little priming in the next print.

 

We're still working on the proper fix, as it's a complex interaction of motion being aborted while the rest of the system is continuing with movements to abort the print. All this causes filament positions to be out of sync and thus the large amount of priming later on.

[cjs 34]

Great! Thanks for keeping us posted/updated @Daid ?

[macio 0]

@Daid
Just ran into the issue again yesterday. Are you still working on a fix?

 

[CarloK 205]

We are continuously improving the software of our printers and many stability improvements for the S5 will become available for the UM3 too. To our regret the last release for the UM3 has been delayed way more than anticipated.

 

The problem we are facing is that the S5 and UM3 are very similar, but differ in a few important ways. We are working hard to give the UM3 an update to the same code base as the S5, but we can only release this when we are absolutely sure the update process will never brick your machine. Tests have been going on for some time now, but new edge cases did pop up again-and-again.

 

We are working hard to release a new UM3 version, but I can't say anything about the timing. It will get there when we feel confident.

[TheoM 1]

Any update on this? Just had it occur again to me. Huge mess, and clogged nozzle. 

[TheoM 1]

To add photos, this time, so big it pulled a section of the silicone off! (PETG, UM3)

 

[Worfje 1]

Any update on this?

 

Just had the exact same issue (huge prime blob at next print attempt after an aborted print).

Using the latest firmware on UM3 (being 5.2.11.20190503 at this time).