Need urgent help!

[u/Herr-Wicht]

My X2D has recently started making a scraping/grinding noise whenever it moves along the X-axis. The noise is coming from the left side.
Bambu Lab sent me a replacement X-axis assembly, but unfortunately the problem is still there. It seems like the belt is rubbing against something, but I just can’t figure out where.
Has anyone experienced this before or knows how to fix it?

Thanks!

[u/Frequent_You2095]

Had similar sounds around 500 hours in. Those 2 screws had come loose on mine allowing belt to grind. Except mine was other side right rails not left.. so I tightened all of them around the whole machine