*TAUT
r1
r1: r*8: time in sec. Default 1.d0
This option is used in moving heat source analyses to automate time incrementation. When a heat source is active, the time increment is set to radius/velocity*r1, meaning that if r1 is set to 1, the heat source will move a distance equal to its radius at each time step. Using a r1 value 0.5 will move one half laser radius per time step, and so forth.
Best Practices: For moving source models *TAUT should be enabled and alteration of time steps should becompleted using the *TAUT r1 value.