how many teeth does you pulley have ?
and how many micro steps per revolution on your steppers ?
For my setup pulley 20 teeth, steppers 200 micro-steps my settings is 80 steps per mm
For recommanded V1 setup its 16 teeth pulley(same 200 micro-steps steppesr if i’m right) and it must be configured at 100 steps per mm
For complete formula read that post :