PRC 1500W CO2 Laser

[Lderoly]

I am welding on the outside of a tube, with a 90 degree presentation relative to the lase beam, with a max Outside Diameter(OD) 0.377 After weld, the allowable weld OD is 0.386
From the settings, how can duty cycle, Frequency, power help me hold the tolerance.
There is also RPM, Start and stop weld degrees that I can edit.

any help would be appreciated.