I have a cedar burl that I would like to carve into using my cnc machine yet it is burning when I attempt to do so. I am using sharp bits, fast feed rate and have tried various spindle speeds to no avail. Even when flattening with my surfacing tool at 150 ipm and only shaving of .001" of material I still get the burning. I was able to sand that off but when I attempt to carve into the wood (even at shallow depths) the burning continues and with carving the sanding is not an option. I have not experienced this on any other wood type that I have carved in the past. Does cedar generally cause this much of an issue? The grain pattern is quite tight and wild if this is a concern.
Thank you for any and all help.
Greg