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Nozzle Switch Un-Retractions *after* extruder positioning

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Posted · Nozzle Switch Un-Retractions *after* extruder positioning

I have an IDEX printer, and when one nozzle retracts, and parks, the second nozzle will unretract, then move to the location for the print - often leading to a small blob on the nozzle which ends up on the object.

 

While I have been able to use a prime tower to dump the extra on, I would like to print without using one - prints occasionally fail due to prime tower issues, especially on variable layer heights.

 

Is there a way to ensure the un-retract happens AFTER the extruder switch is complete and the nozzle is above the part, or perhaps as a stop-gap do another retract until the nozzle is at the right spot.

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