Hi, somehow it happened to me too:
https://ultimaker.com/en/community/view/16448-gaps-in-the-first-layer
my problem was just that the bed was not well leveled.
This may help you:
http://support.3dverkstan.se/article/23-a-visual-ultimaker-troubleshooting-guide#nostick
Recommended Posts
SandervG 1,519
Could you take a close up?
Just thinking out loud; could it be that the bed is levelled too low, and therefor the layers are 'laid down' gently, instead of squished down. (can you just wipe this layer of with your finger?)
Is the open space equal over the entire first layer?
Link to post
Share on other sites