I just milled 1600lft of yellow poplar s4s through my 5 head Weinig moulder. Now moisture content was 8-9 for most part. I put in brand new re-sharpened side knives that are grinded to 20degrees. These are made of black nitride steel. Now as I am running this, I am noticing a lot of tearout on my sides. What can I do to stop this from happening?
I see every once in a while when running casing and base but this seems like it was tearing out a lot more than I usually notice. Sometimes it’s larger tearouts and multiple times on only one side or the other. Now I have to run more to cover those that are really bad. I need some advice.
(Solid Wood Machining Forum)
From contributor A:
I just switched to a 12 inch knife pocket or head. Re-sharpen your knives and that should fix the problem 95% of the time. When I would have extremely stubborn tearout problems I would joint the knives, but then run at regular speed. I’d do this for lacewood, curly maple, and etc. The jointing thing works like magic, but you do sacrifice knife life and you have to grind more off when re-sharpening.