FeatureCAM has a
Counterdrill
hole. These are the manufacturing steps:
- Spot-drill the top.
- Drill the smaller diameter hole.
- Drill the top diameter hole.
The order of these is fixed, you cannot rearrange them in the
Op List.
An alternative manufacturing strategy would be to:
- Spot-drill the top.
- Drill the larger hole on the top.
- Drill the smaller diameter.
You can use the part library to create a feature that uses the alternative manufacturing strategy.
- Create a plain hole:
- Set the
Diameter to
0.375.
- Set the
Depth to
0.25.
- On the
Strategy tab, select the
Spot drill and
Drill options.
- On the
Location tab, set the
X, Y, and
Z
coordinates to
0.0.
- Create a second plain hole:
- On the
Dimensions page, set the
Diameter to
0.25 and the
Depth to
0.75.
- On the
Location page, set the
Z location to
-0.25
- On the
Strategy page, deselect the
Spotdrill option and select the
Drill option.
- Create a group of the two holes:
- Arrange the holes so that the top hole is the first in the group.
- Select the
Ordered option.
Select the group and create a library part.