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X Shift only on Dual Prints

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Hopefully someone can give some advice. i have the dual upgrade on my original. doing single prints seems to be fine, however on dual prints there are random shifts to the right during printing. this does not seem to be effected by choosing the wipe and prime or ooze shield (or neither). the shifting seems to be somewhat on the same level as when filaments change but not always.



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Have you watch it printing? On a dual extrusion print both hotends are heated which means the second hotend is also closer to the printbed/printing layer than in a single extrusion print due to the thermal expansion (it's about 0.1mm). Therefore it might get stuck on the print more easily and could lead to skipping of the x/y axes. Just a theory...


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