Nozzle hits the print - probably

[swinkaszynka 0]

Hello everyone,

I'm learning to 3D print with my U3+ and last night, while Ultimaker was printing 14-15h part, there was an accident. As you can see on the picture, first hours was ok, the element is set in place, support is printed etc. But at some point something happened and whole plate with print on it moved (I closed the metal holders before I started to print, I'm sure). I think there could be problem with leveling at some point - nozzle hit the print, moved it with the plate, and continued printing. This happened to me second time, so I don't think the cause was something from the outside. Do you have any ideas? I've tried to look in FAQs but there's no issues like that.

Here's the image:

[kmanstudios 840]

I have had it hit the print if there is curling and such on edges. And, I have found that having the springs not too tight will let it give a bit if it hits a blob or something. That usually happens when the priming tower fails and it drags some plastic onto an area and creates a not so even surface.

But I have never had the print get hit so strong though, that it could move the plate. The clips may be a bit loose.

If the plate clips are loose, try to push them down, with the plate not in place, a bit to grip the plate better.

Also, how did you level? Manual? Active? I usually have to do a manual every now and then to bring it back into alignment after changing buildplates many times, or if I banged the plate with me clumsy fingers and bounced the plate down on the springs, but I always run an active after that.

[swinkaszynka 0]

Yup, maybe that's the issue. I've always used active leveling. Now, I'll calibrate Z axis once again, and do the manual leveling for the first time. Maybe the springs and the screws was the problem. Thank you for the reply!