Issue with the rotation of the second nozzle

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Dmtr

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Feb 2, 2026, 4:30:16 PM (yesterday) Feb 2

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Hello everyone. I have a machine with two nozzles. The controller is an Arduino 2560 + RAMPS, running Marlin 1.1 firmware. I ran into a problem where only one nozzle (N1) rotates when operated manually via Machine Control + Jog, as well as during nozzle calibration and a job. Moreover, the rotations that are supposed to be sent to nozzle N2 are instead going to nozzle N1.

At the same time, I can force rotation of different nozzles through the console using the commands:

T0
G91
G1 E10 F300
G90

and

T1
G91
G1 E10 F300
G90

However, after the last command, the situation reverses: nozzle N2 becomes active and starts receiving the rotations that were previously going to nozzle N1.