Spacing calibration bar for flow and accelaration calibration

cults3d

I found when I print something with a defined spacing (e.g. 3 mm), I always get 0.2mm lower (so it is 2.8 mm), but the width is almost as the desired. SO I designed this calibration bar to help me check the spacing accuracy by adjusting the accelaration rate and flow ratio. it has several gaps to make sure the accuracy at differetn scales. Hope it will help you as well.