This will be 3D printed near you and delivered to your door by May 05
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This model is for Sailfish firmware (7.6/7.7) Upd Ver 2.0 - complex calibration for every directions CalibrationCircles_Base.stl (Right extruder): CalibrationCircles_Offset.stl (Left extruder) Ver 1.0 - simple calibration for one direction only
Calibration_Down.stl (Right extruder) Calibration_Up.stl (Left extruder) Text from: http://www.sailfishfirmware.com/doc/tuning-dual-extruder-calibration.html#x28-750005.2 5.2 Dual Extruder Calibration This models for x-axis calibration, when you need y-axis calibration - just rotate between z-axis to 90 degree. upd v 2.0
This thing can scale up to max dimensions and see very small offset differences for clear circle.
Printed: 0.2 mm layer. (ABS(240)/ABS(240)/110)
!!! Use correct extruder for each stl file
Accurate model for calibration dual print (0.1 mm)