Problem with tension X

I cant move the x axis as much as it should move.
After auto home i can only move Z and Y as much as i want but X will only move correctly if i hold the belt to create extra tension.
Anybody got any advice to how i should create extra tension ?

Here is 3 images to describe this:

Check the [color=#408040]Wiki [/color]about axis alignment, belt tension etc. If you can’t get this step right your printer won’t work as expected.

From looking at the first picture I think you could put some more tension on the small belt by pushing the stepper more down, and maybe the stepper is tilted a bit to much to. And as Raby said, it’s more likely a bad alignment of the axis that causes your issue, when all the pulleys where lose during assembly could it move perfectly without any resistance? Read the wiki Raby is refering to (some stuff should be in the manual that’s described in the wiki imho)

Kind Regards
JeAfKe

I figured out what the problem was.
I didnt assemble the frame correctly.
The plastic part named Medium corner was supposed to be flipped.
The tension problem is now fixed.