Ultimaker 3 Prints by itself

[gbroemer 0]

I am just curious if anyone has encountered this problem: Sitting idle at the main screen on my ultimaker 3 extended it begins to start a random, old print even when there is no wifi or usb inserted. Has anyone seen or heard of this. I am considering a factory reset.

[Torgeir 242]

Hi gbroemer,

 

Welcome in here.

 

I've never seen anything about such a problem in here, however, I'll think this is possible with the newer generation of printers that can use wifi for printing.  Those printers contain a so called buffer memory, it might actually work as a fifo (first in first out) flash disk. This buffer "disk" might have a decent size so it can hold a big file that's uploaded via wifi, -cause a "drop out" here will/might ruin our printing object. -If it is such a kind of "buffer" memory, it might hold a number of old files in a row...

It is not easy to diagnostic such a problem, but most likely this is caused by the firmware combined by another issue that create this outcome.

A factory reset might be something, also a reload of the current firmware edition (or the previous one).

Lastly, I'll like to mention the use of profiles, -as it "can" control/adjust the firmware..

 

Just my two pence.

 

Good luck

Thanks

Torgeir

 

 

 

[JohnInOttawa 104]

That is a first for me as well.

 

Just as a hypothesis - I can see a couple of scenarios here that might have the potential to trigger an unexpected print.

 

I have two different computers (laptop and desktop) that I use Cura on, both on the same network as my UM3's.  I have accidentally suspended operations on the laptop by closing the lid too early, only to have them resume when it opened. If there was an upload suspended at an opportune time, maybe it would resume?

 

I have also had uploads that hung up during a session on the desktop, only to try and complete the next time I restarted Cura. 

 

Maybe either case, or a combination of events, might trigger an upload to Cura of what looks like an old job, when it's a fresh upload of an old Cura session instead.  I know it is far fetched, but I prefer that version to the thought that my printer has become self-aware.  That reminds me, I should unplug those things....

 

J

 

[geert_2 557]

Some laserprinters (=paper-printers) have an auto-retry function if the print fails due to errors like paper jam, out-of-paper, door-open, etc... Then the print is automatically redone. Some printers can also receive jobs when the printer is offline or asleep, because the network card and electronics keep their power and the job is somehow buffered (I guess...). Also, in Windows a print job may get stuck in the print queue when Windows has problems connecting to a network printer. When you then switch-on the printer, or set it online, or restore the network, it may print those old jobs.

 

Maybe this is something similar? I don't know if Cura has its own queue, or uses the standard Windows/Mac/Linux print queues for sending jobs?

 

[Torgeir 242]

Hi there,

 

Yes, you're right -the queue is "made" in the printer.. 🙂

 

Cheers

 

Torgeir.