UM2+ Prints loosens from build plate

[Dreamss 2]

Hi

I have UM2+ where the prints that are higher loosens from build plate, i have tried a few different prints and they seam to be getting loos around 7-8cm above the build plate.

If any one have any ide what can cause this i would be really happy for input. 

 

Print looks great up to this point.

 

I am using Ultimaker PLA and printing with default settins using cura

 

Edited April 29, 2020 by Dreamss

[Dreamss 2]

For no apparent reason the print head seams to hit the build:

https://1drv.ms/v/s!AgESjhAuHj7zjJt2bclE4syUBwgf_Q

And it gets more and more the higher it is. 

[Dreamss 2]

Figured it out, one of the rods that where loss must have bin like this sins it was new. not i hope to get better results 

https://1drv.ms/u/s!AgESjhAuHj7zjJt8UCYiFW5QdWsN0g