Brand new, 500x700 bed,100w (120max) chinese laser cutter with Reci controller and runnung RDWorks, power is 75% of machine max steady 21mA power reading, I've been unable to get it to give me a smooth cut, tried adjusting the frequency (factory was 4khz) tried values of 10 and 20khz, zero change in appearance, tried with and without air assist, no change in appearance. I can't figure out why the cut is so inconsistent. See images below for RDWorks settings and a photo of the back side of the cut.
https://i.imgur.com/1oIrkeM.jpg
https://i.imgur.com/pK6tUOy.jpg
Any help in getting a smoother cut is appreciated. I have about 10 years experience running laser cutters, and have never encountered this issue before that wasn't a PPI setting, which these lasers do not appear to use.