USB printing with the UM2 is not officially supported, it's not something we developed into the details and it's something that we had lots of issues with so we decided to do SD printing only.
(If you do want to print with USB, you'll have to switch to "RepRap" gcode-flavor in the machine settings instead of UltiGCode. But you might experience connection problems)
Ah, okay. I thought I am doing something wrong.
There are some gcodes in cura on the start/end gcode tab.
The "end" codes should include a Z+0.5 to move the head up away from your part, and an X,Y -20 and then a X,y to position 0 (home position). All of that should move the head up and away. I don't understand why those would make it onto the SD card but not into the file that the cura "print window" uses. It should be the same file and the same gcodes. Probably the "move away" has been removed from the gcode and is now run in Marlin after the gcode file is done. So you could put it back in by selecting "reprap" or whatever Daid just said (Daid wrote cura).
Anyway I would stay away from usb printing. It's very flaky. Many people have seen it crash 8 hours into a 20 hour print. Plus there are screen savers, power savers on your computer, (windows update nailed me once!). Better to use the SD card.
Also the serial path is slower and sometimes if you have thousands of tiny line segments, the USB can't keep up. For example when printing the "yoda" model or anything scanned.
I have the same with my Ultimaker2, though I'm not using USB printing.
The nozzle stays on top of the print, on the last print position, and does not move away from the object.
It then first extrudes some extra filament, leaving a clogged of plastic on the object. Just after that the nozzle moves away.
How can I change this?
I have the exact same issue on my Ultimaker 2+ since the last cura update
That's a very old thread and a different issue. I'm pretty sure that this is a firmware glitch.
Someone on the german forum solved it by re-installing the older firmware that came with Cura 2.5
Thanks tinkergnome, for responding!
It is an old thread, but I wanted to prevent to start new threads about the same issue.
In fact the issue I was having is no different than described here. Exactly the same happened. I noticed it happened after having updated Cura to the latest version 3.2.1. Nevertheless, I now also noticed that it happened with a specific 3D design. Printing a different objet after it, did not have the issue of the nozzle hanging at the end position at the end of the printing.
So I am still not sure whether it is Cura/firmware or the 3D design of the object.
Hello I had the same issue, I answer in a different thread in french. I think I fix it.
this comes from a bug in CURA 3.2 and 3.2.1 on mac. I did different test and I was able to clear the issue by using Cura 3.2 on windows or by downgrade to CURA 3.1 on mac. note that to fix the issue when I re install CURA 3.1, I had to remove and recreate the printer. for a reason I do not understand CURA keeps my printer settings after the downgrade.
hope it helps.
link to the post in french:
Thank you Jerome for trying to help.
Unfortunately, changing to a Windows PC and software does not work for me as I don't have that available.
Do you know how to make a direct report of this bug to Ultimaker?
Found the place for reporting issues at GitHub.
Also found out that the issue has been recognised by Ultimaker. It will be solved through the next firmware version.
Manually this can be solved by adding command in the Code file.
what I did to use it with my mac is to go back to CURA 3.1 which works fine for me. to make it working I had to first reinstall cura 3.1 then in Cura delete all existing printer and recreate the printer.
jerome
This issue has just started happening with my Ultimaker 2+ since last week, I've been using Cura 3.6.0 for some time.
The nossel does not move away when done and melts the finished print.
The menu on the printer when in this state allows me to switch between pause and abort, but neither option when selected do anything.
Same issue here after installing Cura 4.0. It retracts the filament by around 10cm but just stays there. Doesn't happen with all prints though..
Hello all,
i noticed this thread is a few years old but i am having this same issue as of a couple days ago. After the print, the filament retracts some but the nozzle stays attached to the parts. I have tried 3-4 parts to dial in and fix this, 6 total but it’s happening every time. Last print when the print head decided to move up and away, it pulled a small strand off the top layer of the part with it. I am also working on warping when i dont use a brim. Seems no matter what i do it happens. One thing at a time i guess. Aside from adding/modifying the end gcode is there a way to fix this ? Its weird how it only started happening about 2-3 days ago. But its every print since it started. Test prints for pics are 2, 1 inch cubes on fast settings and a part of a building 80x10x5mm on fine settings. Any help would be great! 
MariMakes posted a topic in UltiMaker Cura,
ArunC posted a topic in UltiMaker 3D printers,
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ian 32
im guessing David will get on this question pritty fast this morning..
the only thing i can think of is. did your usb cable come loose and maybe interupt the data at the end of print... confusing the printer ?... or maybe the usb cable is too long and the data... screwed up ?
you can show us your 3d model. put it on youmagine and we can have a look for you... maybe there is something weird there..
cant imagine there is no home command after a completed print with an ultimaker2.
Ian :-)
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