Here I was reading about everyone else that had smoke coming out of their machine and how they were supposed to clean out their exhaust outlet. So this evening I too was watching the smoke meandering about inside the machine and pouring out the lid so l went first to the exhaust system. Now just on a whim I had purchased a brush at Home Depot on a string of flexible fiberglass poles.
I had been more interested in the fiberglass poles at the time, so as it was just sitting there I ran it through the exhaust system and what came out looked more like gray cotton than ash or saw dust. Remembering how engrave leaves not a flat surface on wood but like a 3d print of the wood’s structure with often large fibers going in every direction that gives the wood strength and resiliency. Obviously cutting and engraving sends those fibers out long and thin and can build up quite a log jam. And that seems to be what happened so the entire hose looked like it had been stuffed with cotton so the increased back pressure was (and still is) inevitable when cutting a lot of wood, especially oak.