Yes, it is dual extruder setup. But physical extruders are set at an angle and can swing for 12 degrees around horizontal axis (I attach picture). configuration.h file in marlin offer very convenient setup with SWITCHING EXTRUDER option where all offsets (X, Y, an Z) and activation of swinging servo is included. It dopes not exist for dual extruders. With simple dual extruders you have to manually align hotends at exact same height and when you print with one extruder, the second mess the print with its oosing. If there is separate standing towers not used extruder can kick them off. Swing has been done before, but people complain about servo accuracy. Setup, which I implement, is not affected by 5 - 10 degrees of servo inconsistency.
I actually found the way to activate second stepper when swing to second extruder, but I face motion problem. It seems that second extruder offset is not accounted. Will work on it today.
I actually found the way to activate second stepper when swing to second extruder, but I face motion problem. It seems that second extruder offset is not accounted. Will work on it today.