Unresolved X is shifting allover

Can someone help me with this ?
I keep getting random X shifts here and there no matter how fast or how slow i go.
Looking at the bottom left corner i can see that shift somehow took place only on one corner instead of the entire model, so it suggest that pulley did not jump a tooth. If it did jump a tooth, then entire model would be shifted but its becomes back to normal later.

Printer is on metric Z and directdrive extruder

 

very much so. If it was belt, both sides would be effected left and right, but only left is shifted while right is at its correct place.
Printer runs right now and i already see same thing. I started with 40mm/s and problem showed up some layers later. Then i went 80mm/s and it seem to be having no effect at all, no better no worse.

But am having my doubts about the belt.

Is there printable clamp i can try ? Because i only have one zip tie holding it.

 

Tony try this setup, this is what Mark shared with me when I first got my printer. I use this same setup and it works very well for me.

 

LOL i dont have a single ziptie but here i would need 6.
Not sure why would that make anything better, it creates more dampening which could be issue running fast with high acceleration rate (3500 default is high)

 

Ok looks like it was the belt. It was so tight it was slipping thru its teeth because zipties were not holding it hard enough.
I printed a clamp to hold it in place harder and it seem to work.

I was so sure it wasn't the belt i was almost willing to ignore every belt related comment
Stupid me