SV06 layer shift

I just got my SV06 set it all up tensioned the belts and now I am getting horrific layer shifting on the stock benchy.

Can anyone help? I don’t know what is causing this, I have leveled everything checked bolt tension on every bolt, zero’d the gantry and exhausted every idea I have.

I figured it out, I took the stepper motor off and realized the toothed cog was completely loose. It allowed the stepper cog to twist back and forth freely so when the belt changed direction it would shift up to an additional 1/8th if an inch each direction.