07-30-2012, 07:16 PM
If you use the compound method, you get less load on the tool and cross slide, and it will allow a positive top rake, which is good for softer material especially. Left flat on top, you have a neutral rake and can let the tool drag on the trailing edge with no real tearing or smearing other than just from the neutral rake. For HSS, I prefer some positive rake. So if I use the compound method, I use a positive rake, and as close to 30° as possible and get a fuzz on the trailing edge. In reality, I rarely use HSS in favor of carbide, and plunge straight in. I take many light cuts and never have a problem with chip control or finish.
In CNC programming, it is common to use the compound feed method, and additionally, one method that alternates cutting the front flank with the trailing flank, with the DoC shrinking as it nears size. Very little stress on the machine or insert. I do not remember the code for that method.
In CNC programming, it is common to use the compound feed method, and additionally, one method that alternates cutting the front flank with the trailing flank, with the DoC shrinking as it nears size. Very little stress on the machine or insert. I do not remember the code for that method.