1. Welcome Mill Lesson 15 – Part-3
Computer Aided Manufacturing
Using Mastercam

2. Mill Lesson 15 The Process
Toolpath Creation
TASK 1: Setting the environment
TASK 2: Open existing file from the multimedia CD
TASK 3: Define the rough stock using stock setup
TASK 4: Rough mold core using surface high speed (core roughing)
TASK 5: Finish profile surfaces using surface high speed (waterline)
TASK 6: Finish all remaining stock using surface finish leftover
TASK 7: Verify the toolpath and compare to STL file
TASK 8: Save the updated MCX file
TASK 9:Post and create the CNC code file
TASK 10:Create ActiveReport

3. Demonstration of Mastercam?
Verify Lesson 15

4. Finish Profile Using Surface High Speed Waterline
In this task you will use a 0.5 diameter Ball end mill to finish the mold.
Toolpaths>Surface High Speed... 4

5. Finish Profile Using Surface High Speed Waterline
For programming, it is efficient to use Mastercam’s various functions such as Horizontal, Waterline and Rest Material to isolate part features and machine them with the best strategy and tools.
Waterline toolpaths are best suited for surfaces whose angles are between 30 and 90 degrees. This is because the distance between passes is measured along the tool axis. Where the surfaces are shallower, material typically won't be removed as efficiently. However, you can configure the toolpath to generate extra cuts in shallow or flat areas. 5

6. Finish - Drive Surfaces
The surfaces, solid faces, solid bodies, or CAD files that
will be cut.
Select the base solid as shown below. Solid Selection
turned on. 6

7. Finish Tool Containment Boundary
A closed chain of curves that limit tool motion
Cplane - Chains only entities that are parallel to the current construction plane and at the same Z depth as the first entity you chain. 7

8. Finish - Tool Path Type
Waterline toolpaths are created from a set of profile curves along the cut
surfaces.
The profiles are separated by a constant Z amount. They are similar to finish
contour toolpaths, but use Mastercam's high speed toolpath techniques for
a smoother, more efficient tool motion. They are typically used for finishing
and semi-finishing operations. 8

9. Finish - Cut Parameters
Note that the Stock to leave for all finishing toolpaths will be 0 9

10. Transitions
Use this page to configure the entry move that the tool will make as it transitions to new Z levels.
The difference between these moves and the approach/retract moves on the Linking Parameters page is that the linking moves connect multiple cuts on the same Z level, while these moves control the transition to a new set of cuts on a different Z level.
Tangential ramp creates a true high speed transition between the cutting passes.
Mastercam inserts arcs at the beginning and end of the ramp for the smoothest tool motion into and out of the move. 10

11. Finish - Steep / Shallow
Steep / Shallow: Use this to limit how much of your drive surfaces will be machined. Typically these options are used to create machining passes in steep or shallow areas, but they can be useful for many different part shapes.
Detect limits
Mastercam automatically
populate the Minimum and
Maximum depth fields with
the highest and lowest points
on your drive surfaces. 11

12. Finish - Arc Filter / Tolerance
Smoothing - corner rounding
The Profile tolerance and Offset tolerance are used to smooth corners in the toolpath. 12

13. Demonstration of Mastercam?
Verify Lesson 15 – First two operations 13