Indexed Concentric Rings, Dual Extruder Offset Calibration

thingiverse

This is a reworked version of the Concentric Ring Extruder Offset Calibration model. I have enlarged it slightly and added an index marker so that the print can be safely removed from the bed without losing its alignment. The index mark should point towards the top left corner. After importing both parts, assign each to a different extruder, then center them precisely on the bed to create the merged object. The inner ring must fit snugly within the outer ring. After slicing and printing, measure any misalignment that occurs and adjust offsets accordingly. In most cases, you'll want to apply half of the adjustment to each extruder.