Arc cutting with roughing end mill was much easier than with normal end mill. With normal end mill I cut in gradually with many paths, but with rougher t6 MS plate could be cut in only one path.
今回はラッファーを使ったのですごく楽。以前のように少しづつ下方に切り込んでいく必要がない。t6の板を一気に切削できる。