Dual Extrusion Calibration, just four small cubes (2x2)
thingiverse
To achieve accurate x/y calibration between the two extruders, I designed a simple calibration test. First, just print it once - see my try no.1. Next, measure the two x-values (1st+2nd cube & 3rd+4th cube) - they are 20.8mm and 19.5mm. Then, subtract them, divide the number by 2 (your two extruders) - 20.8-19.5 = 1.3 / 2 = 0.6mm. Modify the x-offset in your slicer accordingly - Extruder#1 gets -0.6mm and Extruder#2 gets +0.6mm. Repeat this for the y-values. Continue testing until you are satisfied. Hint: Separate the STL in your slicer first. For those using Simplify3D, I have added my factory file to make the difficult work easier already. Update: If anyone has issues separating the calibration file, place four cubes near each other and you'll be fine. Print Settings Printer: Geeetech Prusa i3 Pro C Rafts: Doesn't Matter Supports: No Resolution: 0.2mm Layer height Infill: 10% Notes: The cubes are only 3mm high, so the print should take about 5-10 minutes. Hint: If you tell your printer to heat up both extruders and the bed before starting the dual print, it works way better!
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