Is the 4th stepper motor supported in Firmware 4.x?

It’s unclear to me if the 4.x firmware will drive the 4th stepper motor (which was used for the extruder for 3d Printing). I am interested in driving it using Gcode.

Hi Sir,

Please note that 4.x firmware is not supported 4th stepper motor, and our new model of uarm(1320) has removed this function in hardware as well.

Best regards,