This document provides instructions for programming a lathe using Mastercam Lathe. It describes the basic steps for developing a program which include selecting the machine, importing or creating a 2D/3D model, setting up the stock, creating the program operations, verifying with simulation, and generating NC code. It also provides details on how to set up the stock, create and manage tools, and configure parameters for various lathe operations like facing and rough turning.

1. MASTER CAM Lathe
Prepared by
Virender Singh Bhati
Akash Shukla
Guidance by Mr. Dharmendra Rajput
HOD – Tool Room Department
NSIC Rajkot

2. Machine
Steps for Develop Program
 Select Machine
 Import/Create Model (2D/3D)
 Plane Arrangement
 Stock Setup
 Program (Operation)
 Verify (Simulation 2D/3D)
 Generate NC

3. Machine

4. Machine
How to Chose Machine
 Select Machine (Mill/Lathe)
 Manage List
 Select List Lathe.Defalt MM.MCAM – LMD

5. Machine
Stock Setup
 Properties
 Stock Set up
 Stock
 Properties
 Provide Length & Dia.
 Use Margin(Dia.,Face, Back Side)
 Chuck Jaw
 Properties
 Grip on Max. Dia.
 Provide Grip Length
 OK

6. Machine
How to Create a New Tool
 Select Type of Tool
 Select Insert as per requirement
 Select tool Holder
 Select Parameter
 Tool Number
 Tool Station Number
 Tool Offset Number
 Spindle Speed
 Feed
 Provide Tool Name
 Set up Tools
 Spindle Rotation
 Mounting Position
 Draw Tool
 OK

7. Machine
How to Make Tool List
 Select Files
 Tool Library
 Select Tools

8. Toolpaths Manager
Toolpath Commands
 Each machine properties folder has three parts:
Open Files
 Opens the Files tab of the Machine Group Properties dialog box. In this tab, you can
specify the names and data paths of files needed by the operations in this machine
group, and other important machine group properties.
Open Tool Settings
 Opens the Tool Settings tab of the Machine Group Properties dialog box. In this tab, you
can control how Mastercam assigns tool numbers, tool offset numbers, and default
values for feeds, speeds, coolant, and other toolpath parameters.
Stock Setup
 Opens the Stock Setup tab of the Machine Group Properties dialog box. In this dialog
box, you can set up the stock models to help you visualize your toolpaths more
realistically.

9. Toolpaths Manager
Toolpath Commands
 When you choose or create a machine definition in Mastercam, that
information is housed in a Machine Group folder in Toolpaths Manager. When
that folder is created, it is automatically populated with a subfolder called the
Machining Properties folder, which houses toolpath groups and operations,
and a toolpath group folder, which houses operations for that machine group.
 Open Machining Properties Folders
A single part can have multiple machine groups, each containing machining
properties folders that identify properties (i.e., support files, tooling, stock, etc.).
Each folder houses the details for the machine group settings. Each toolpath
group listing begins with this information. These details are set in the Machine
Group Properties dialog box.

10. Toolpaths Manager
Tool Setting
Default Program Number is used to enter a number if your machine requires a
number for a program name.
Assign tool numbers sequentially allows you to overwrite the tool number from
the library with the next available tool number.
Warn of duplicate tool numbers allows you to get a warning if you enter two
tools with the same number.

11. Toolpaths Manager
Toolpath Commands
 Select all operations
Selects all operations listed in the Toolpaths Manager. Use to post, verify,
regenerate, or perform other functions on all operations within a job.
 Select all dirty operations
Selects all dirty (invalid) operations in the Toolpaths Manager. Use to
post, verify, regenerate, or perform other functions on selected
operations within a job.
 Regenerate all selected operations
Recalculates selected operations after you have made changes.
 Regenerate all dirty operations
Recalculates all dirty (invalid) operations after you have made changes.

12. Toolpaths Manager
Toolpath Commands
 Backplot selected operations
Simulates tool movement for selected operations.
 Verify selected operations
Simulates machining and material removal for selected operations.
 Simulator Options
Opens the Simulator Options dialog box.
 Post selected operations
For a non-Mill-Turn part, runs the post processor for selected operations
and creates the NC program. If you are in a Mill-Turn machine group, this
button runs Sync Manager. For more information, please see About Post
Processing.

13. Toolpaths Manager
Toolpath Commands
 High feed
Optimizes feed rates for selected operations. For more information,
please see High feed Machining.
 Delete all operations, groups and tools
Deletes all machine groups in the Toolpaths Manager except for the last
one in the list. This deletion includes operations, tools, and machine
definitions.
CAUTION: You will not be able to undo this deletion.
 Help
Displays the Help for the Toolpaths Manager.

14. Toolpaths Manager
Toolpath Commands
 Toggle locking on selected operations
Locks and unlocks selected operations. Locking the operation prevents
you from regenerating the toolpath.
Note: If you regenerate the toolpath after unlocking it, you will lose any
changes you have made.
 Toggle display on selected operations
Displays and hides selected operations in the graphics window. When a
part contains a mixture of operations that are displayed or hidden,
clicking Select all operations and then Toggle display on selected
operations hides all toolpaths in the graphics window. Clicking Toggle
display on selected operations again shows all toolpaths.

15. Toolpaths Manager
Toolpath Commands
 Toggle posting on selected operations
Enables and disables posting on selected operations. Note that the ghost
symbol indicates that posting is off for the operation.
 Move insert arrow down one item
Moves the insert arrow down past the next operation. The insert arrow
controls where new operations will be inserted. Its default position is at
the bottom of the list of operations.
 Move insert arrow up one item
Moves the insert arrow up past the previous operation. Its default position
is at the bottom of the list of operations. The insert arrow controls where
new operations will be inserted.

16. Toolpaths Manager
Toolpath Commands
 Position insert arrow after selected operation or after selected group
Moves the insert arrow down past the selected operation or group. Its
default position is at the bottom of the list of operations. The insert arrow
controls where new operations will be inserted.
 Scroll window so insert arrow is visible
Scrolls the viewing area to display the point at which you can view the
insert arrow.
 Only display selected toolpaths
When enabled, displays toolpaths in the graphics window only for the
operations you select in the Toolpaths Manager list. Can be used in
combination with the Only display associative geometry.

17. Toolpaths Manager
Toolpath Commands
 Only display associative geometry
When enabled, displays all geometry associated with the selected
operations, provided that the geometry is not hidden or blanked, and is
on levels that are visible. Can be used in combination with Only display
selected toolpaths.
 Hide rapid retract moves
Hides and shows all rapid retract moves in the current file.

18. Toolpaths Manager
Toolpath Commands
 Tool setup
Click to open the Tool Setup Manager dialog box. Use the dialog box to
establish the physical orientation and positioning of tools used in the
active machine group.
 Edit reference positions
Click to open the Machine Reference Position Manager dialog box. Use
to edit the location of the reference positions.

19. Toolpaths Manager Short Cut Key
The following shortcut keys (hotkeys) are available when you are working in
Toolpaths Manager.
 E - Expands or collapses all operations
 L - Toggles toolpath locking on selected operations
 P - Toggles posting on selected operations
 T - Toggles toolpath display for selected operations
 Del key - Deletes selected operations
 Up arrow - Moves Insert Arrow up
 Down arrow - Moves Insert Arrow down
 Left arrow - Positions Insert Arrow after selected operation/group
 Right arrow - Scrolls Toolpaths Manager list to make Insert Arrow visible
 Ctrl+C - Copies selected operation(s)
 Ctrl+X - Cuts selected operation(s)
 Ctrl+V - Pastes cut or copied operation(s)
 Ctrl+A - Selects all operations
 Ctrl+Z - Undeletes deleted operation(s)

20. How to copy a Program M-Card to
Machine
Make 4 No. at Offset
Device
+
M card
OPRT
+
F input
+
Select Program
F Get
+
F Set
Provide Program No.
P Set
Exec

21. CNC Tooling

22. Facing

23. Toolpaths Manager
Face Parameter
 Entry amount sets the height at which the tool rapids to or from the
part.
 Rough step over sets the roughing pass value.(Rough Depth of Cut)
 Finish step over sets the finish pass value.(Finish Depth of Cut)
 Overcut amount determines how far pass the center of the part the
tool will cut.
 Retract amount determines the distance the tool moves away from
the face of the part before it moves to the start of the next cut.
 Stock to leave sets the remaining stock after the tool completes all
passes.
 Cut away from the center line sets the tool to start cutting closest to
the center line and cut away from the center line at each pass.

24. Example For Coordinate

25. Example
Raw Material Size:-Dia.30X70

26. Exercise

27. Toolpaths Manager
Rough Turning/Boring Parameter
 Depth of Cut Sets the amount of material to be removed during each
pass.
 Equal Steps sets the Depth of cut Value to the Maximum amount of
Material amount of material that the tool can remove at each pass to
ensure equal passes.
 Minimum cut depth sets the minimum cut that can be taken per pass.
 Stock to Leave in X sets the remaining stock in X axis after the tool
completes all passes.
 Stock to leave in Z sets the remaining stock in Z axis after the tool
completes all passes.
 Entry amount sets the height at which the tool rapids to or from the
part.

28. Toolpaths Manager
Stock Recognition
 Use stock for outer boundary: The stock is used as the outer boundary for
roughing.
 Extend contour to stock only: The chained contour is linearly extended to
the stock using the parameters set using the Adjust Stock dialog box if the
endpoints are inside the stock boundary.
 Remaining stock: Uses only stock remaining from previous operations.
 Disable stock recognition: The roughing toolpath is computed as if the stock
does not exist. You must chain the outer boundary for roughing between
boundaries.

29. Toolpaths Manager
Lead in/ Lead out
 Adjust Contour allows you to extend or shorten the contour by an
amount or by adding a line. We are extending the lead out to ensure
that the part is completely machined.
 Feed rate allows you to specify a custom feed rate for the lead in/Lead
out.
 Exit Vector allows you to create a tangent arc move or perpendicular
move to start the toolpath. You can also manually define an entry/exit
vector or let the system automatically calculate a vector for you.

30. Raw Material Size:-Dia.50X70

32. Exercise

33. Turning with Radius Exercise 01
28

34. Turning with Radius Exercise 02

35. Exercise
Tools
1. Rough Turning Tool
2. Finish Turning Tool

36. Exercise

37. Toolpaths Manager
Rough Turning/Boring Canned cycle Parameter
 Stock to leave in Z (W) sets the remaining stock in Z axis after the
tool completes all passes.
 Stock to Leave in X (U) sets the remaining stock in X axis after the
tool completes all passes.
 Clearance X sets the extension at the start or end of the chain in the X
direction.
 Clearance Z sets the extension at the start or end of the chain in the Z
direction.
 Depth of Cut (U) Sets the amount of material to be removed during
each pass.
 Exit Length (R) Sets the height of the 45 degree retract move at the
end of the pass.

38. Toolpaths Manager
Pattern Repeat Parameters
Parameters
• Pattern offset angle
Enter the angle at which the cutting passes will be offset from the original contour.
This angle is typically measured relative to the Z or spindle axis.
PERMANENTLY change to longhand
Select to disable the canned cycle output. Instead of outputting a single canned cycle
G-code with its parameters, your NC program will contain all of the individual position
moves. Once you generate the toolpath with this option selected, you will not be able
to change back to canned cycle output.
• Stepover
Enter the amount of stock to remove from the diameter with each pass.
Number of passes
Enter the number of passes to create. Mastercam multiplies this number by the
Stepover and then adds the Stock to leave, to calculate how much total stock it needs
to remove in this operation.
• Stock to leave in X
Determines how much stock remains in the X direction when the operation is

39. Exercise

40. Toolpaths Manager
Drill Parameter
 Depth sets the locating of the bottom of the hole.
 Drill Point X,Z allows you to choose the point location where you want
to drill.
 Clearance determine the point at which the tool starts to move at the
feed rate towards the stock.
 Drill tip compensation automatically adjusts the depth value by
adding the tip of the drill to it.
 Breakthrough amount allows you to add extra distance to the depth
for through holes.

41. Drilling Exercise 01
Operation
• Centre Drill
• Drill 10 mm

42. Drilling Exercise 02

43. Grooving Exercise 01
Operation
• Facing
• Rough Turning
• Finish Turning
• Grooving

44. Toolpaths Manager
Groove Selection Parameter
 1 Point allows the user to selected points from the graphic area to
identify a groove.
 2 Points allows you specify a groove by indicating the top corner of
the groove and the point in the lower opposite corner.
 3 Lines allows you to select three from the graphics screen to define
the groove by chaining on screen geometry.
 Multiple chains allows you to chain multiple groove by chaining on
screen geometry.
 Manual point selection allows you to manually select points from the
graphic area.
 Window point selection allows you to create a window in the graphic
area and chains all of the points within the window.

45. Toolpaths Manager
Groove Rough Parameter
 Cut Direction determines the direction that the tool will rough the
groove (Positive , Negative , Bi-Directional - Alternating , Bi-Directional
– Positive First, , Bi-Directional Negative First , or Chain Direction.
 Stock Clearance determines the point up to which the tool retracts
after each pass.
 Stock to leave in X sets the remaining stock in the X axis after the
tool completes all rough passes.
 Stock to leave in Z sets the remaining stock in the Z axis after the
tool completes all rough passes.
 Rough step sets the amount of material to be removed with each
roughing pass. It can be set as a number of steps amount or as a
percentage of tool paths.
 Back off % sets how far the tool backs away from the wall of groove
before it retracts.

46. Toolpaths Manager
Groove Finish Parameter
 Direction for 1st Pass determines the direction that the tool will finish
the groove (CCW –Starting on right wall or CW – Starting with the left
wall). With the first pass of a finish toolpath, the tool cuts down on one
wall of the groove to the groove floor and then retracts out of the
groove . On the second pass, the tool cuts down the opposite wall of
groove to the groove floor and moves across the groove floor to the
point where the first pass ended.
 Retraction Moves sets the retracts moves to Rapid moves or with a
specified Feed Rate.
 Finish Step over sets the maximum amount of material the tool will
remove with the finish pass.

47. Toolpaths Manager
Groove Finish Parameter
 Stock to leave in X sets the remaining stock in the X axis after the
tool completes all finish passes.
 Stock to leave in Z sets the remaining stock in the Z axis after the
tool completes all finish passes.
 Overlap Distance from 1st corner sets the amount the tool cuts the
floor before retracting out of the groove.
 Overlap between passes sets the amount the tool overlaps the first
pass before it retracts.
 Wall Back off % sets how far the tool backs away from the wall of
groove before it retracts.

48. Insert Thickness - 3mm
Grooving Exercise 02
Raw Material – Dia. 50x70

49. Example 01 - ID Cutting (Boring)
Operation
• Facing
• I.D. Roughing
Raw Material :- I.D. 35 mm

50. Exercise - 01

51. Exercise - 01

52. Exercise

53. Exercise

54. Thread Shape Parameters

55. Thread Cut Parameters

56. Threading Exercise 02
O0033; Threadding M20x1.5
G28 U0.0 W0.0;
T0101;
G97 M04 S400;
M08;
G00X30.0Z10.0;
G00X25.0Z3.0;
G76 P010060 Q100 R0.05;
G76 X18.2 Z-30.0 P919.5 Q300 F1.5;
G00X30.0;
Z10.0;
M05;
M09;
G28 U0.0 W0.0;
M30;
%
M20 x 1.5
Length 30mm
Thread Depth(P) = 0.6 x Pitch of Thread
= 0.6 x 1.5
= 0.9
Minor Diameter Calculation
d= Minor Diameter
D= Major Diameter
P=Thread Depth
d= D-2(P)
= 20-2(0.9)
= 20-1.8
= 18.2

57. Exercise
Raw Material Size:-Dia.32X70mm
Operations
 Facing
 Rough Turning Tool
 Finish Turning Tool
 Grooving
 O.D. Threading Tool

58. Exercise

59. Exercise
1. Centre Drilling
2. Drilling
3. Boring
4. Internal Grooving
5. Internal Threading

60. Exercise
Raw Material Size:-Dia.32X70mm
Operation
1. Centre Drilling
2. Drilling
3. Boring
4. Grooving
5. I.D. Threading

61. Stock Flip

62. Exercise

63. Exercise
70
40
50

64. Toolpaths Manager
Cutoff Parameters
 Retract Radius sets the distance from the stock where the tool starts
with the feed rate.
 X Tangent Point sets the distance as a radius value up to which the
tool cuts to.
 Cuts to :- Determines if the center of the Front Radius or Back Radius
is going to reach the final depth.
 Corner Geometry parameters allow you to create a chamfer or radius
on the corner of the part.

65. Toolpaths Manager
Dynamic Rough Parameters
One way (Cutting Method)
 The tool cuts the part in one direction, comes up, goes back to the
beginning, and cuts again. The picture in the dialog box changes to
show this tool motion.
Zig-zag (Cutting Method)
 The tool cuts the part in a back and forth motion. The picture in the
dialog box changes to show this tool motion.
Rough direction
 Determines the angle that the tool cuts into the part. This angle is
relative to the rough direction of OD, ID, Face, or Back. Click the
corresponding illustration from the drop-down.
Stepover
 Determines the amount of material removed with each pass. The
Stepover is a percentage of the tool radius, not the diameter.

66. Toolpaths Manager
Dynamic Rough Parameters
Toolpath radius
 Determines the radius of the toolpath used to enter and exit each
cutting path. The Toolpath radius is a percent of the tool radius, not the
diameter.
Stock to leave in X
 Determines how much stock remains in the X direction when the
operation is finished. Typically, this would be removed by a separate
finish operation.
Stock to leave in Z
 Determines how much stock remains in the Z direction when the
operation is finished. Typically, this would be removed by a separate
finish operation.

67. Toolpaths Manager
Lathe Point Toolpath
 Use the Lathe Point Toolpath dialog box to create or edit a lathe point
toolpath. When you start the toolpath, you are prompted to select the
first point to which the tool will rapid from the home position. For each
point, first choose the motion mode, and then click the desired location
in the graphics window. Press [Esc] when you have finished selecting
points. The Toolpath parameters tab, where you can select tool,
coolant, stock, and other toolpath options, displays.
The dialog box contains the following options:
 Specifies the move type, either Rapid, Rapid break, or Feed rate.