I'm new to laser cutting and have a question with regards to cutting power and feed/speeds. I'm trying to cut a lightweight synetic fabric material with a 7w diode based laser. I have currently set around 12.5% cutting at 5 inches per min. Results are okay but there is some yellowing around the edges. Would you suggest upping the power/cut speed or retarding it? Is there a general ratio of wattage change to speed feeds?