Page 185 - ISCAR(MILLINGCATALOG 38_2021)

USER GUIDE

• Step #2
Select the process. Each
CAM defines different relevant
processes, for example:
Surface, 5-Axis, Adv3D, etc.

Remember:
The advantage of barrel endmills
is realized when used for 5
axis, finish milling operations ENDMILLS • SOLID CARBIDE • MULTI-MASTER

Important
Each CAM software has its own
features to configure the tools
and their machining processes,
but the definitions are similar.
The following example
demonstrates only one way to
define a Surface Finish (Ra) and
is process dependent. In this
example you will notice how
many stepovers are required
in order to obtain the same
Ra with different tools.
There are many different
options to define the required
results from a tool.
Example
Same Ra – Different stepovers

Ball Nose Ø12 R6 [Ø.472” R.236”]

Oval Ø12 R80 [Ø.472” R3.15”]

Taper Ø12 R250 [Ø.472” R9.84”]

Lens Ø12 R25 [Ø.472” R.98”]

Take Into Consideration
Barrel milling should not always be considered the answer to finishing all 3D machined surfaces. Some part shapes are not
conducive to Barrel milling operations. Sometimes, the blend radii of the machined part or the kinetics of the machine result
in a complicated CAM tool path which may increase the cycle time compared to using a conventional Ball-Nose milling
approach. This is where the need for a highly skilled programmer to make good and effective decisions comes into play.

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