Print problem on ultimaker 2

[impreza54 0]

Hello,

I have some issue printing a part. please have a look to the pacture below :

what is the cause?

thank you for your help

 

[illuminarti 18]

You have a long thin part, with very little contact area with the bed. When the plastic cools, it contracts, exerting forces on the print that make it tend to curl, and so pull off the bed.

Make sure that you are using some glue to help the part stick to the bed, and try printing using at least 20 loops of brim on the first layer. That will give a much larger surface area, and help to spread the curling forces, so it can stick better.