M203
[E<units/s>]
[T<index>]
[X<units/s>]
[Y<units/s>]
[Z<units/s>]
[E<units/s>]
E axis max feedrate[T<index>]
Target extruder (Requires DISTINCT_E_FACTORS)[X<units/s>]
X axis max feedrate[Y<units/s>]
Y axis max feedrate[Z<units/s>]
Z axis max feedrate