ConcentricRings Dual Extruder Calibration

thingiverse

I created this pair of concentric rings as a calibration test for my dual extruder setup's x, y axis alignment. The initial print on the left was made with rough estimates for the offset between the two nozzles, resulting in noticeable misalignment. I then measured the (x,y) error while the print remained on the bed and recalculated new offset values to achieve perfect alignment in the second print, on the right. Check it out!