@tkln no, you need to define each motor as a separate axis, and move that. So for the X axis, define an extra axis U which has the motor you want to move independently:

M584 X0.2:0.3 U0.3

Then you can move the U axis with G1 U5 (relative rather than anbsolute axis movements will probably work best). I’m not sure exactly what will happen when you send a subsequent G1 X… movement, though. It should keep the spacing you have set. You will also need to home the U axis first, or give it a position with G92.

RRF does not natively support a six axis delta, so it will rely on the slicer to send appropriate commands if using more than the standard 3 axes.

Ian