A problem with tensioning two sections of ART2

Hello,
I have started my build a while ago, and everything seems to work fine except of articulation 2 movement. When I try to move it through Asgard software – it starts to move but then skips the teeth of the gear and can’t get up. I feel like there is a problem with tensioning of two sections ART2 – which is not allowing proper connection of the gears to the plastic part.
I have added a link to an image where you can see a big gap betweeen the parts I have tried to hold this part with my hand and turn on the ART2 – then it started to go up perfectly without skipping any gears. So – is there any way to tension it?
P.S. I did the assembly part right, all the 3D printed parts are correct and all the bolts are tightened up.

Thank you,
Adamson

• This topic was modified 2 days, 4 hours ago by Adamson.
• This topic was modified 2 days, 4 hours ago by Adamson.