CNC Control Setup for Milling and Turning:. Peter Smid
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Power-On Defaults
End of Program Functions
Number of M-Functions in a Block
Automatic Corner Rounding
PARAMETERS OF SPINDLE CONTROL
Maximum Spindle Speed
Spindle Orientation Code
PARAMETERS OF TOOL OFFSET
Offset Address
Lathe Offsets
Clearing Offsets
Radius vs Diameter
Wear Offset
PARAMETERS OF CYCLES
Fanuc 15 Mode - Compatibility
Spindle Rotation Direction
Clearances in G73 / G83 Cycles
PARAMETERS OF THREADING CYCLE
PARAMETERS OF MULTIPLE REPETITIVE CYCLES
Available Cycles
Parameters for G71 /G72 Cycles
Parameters for G73 Cycle
Parameters for G74/G75 Cycles
Parameters for G76 Cycle
BATTERY BACKUP
PARAMETERS AND G10
NO DECIMAL POINT ENTRY
Historical Background
Equivalent Numbers
Input Without a Decimal Point
SUMMARY
Chapter 24
PROGRAM OPTIMIZATION
PROGRAM REVIEW
PROGRAM RELATED CHANGES
CHANGES AT THE CONTROL
Spindle Speeds and Feedrates
Clearances
Optimized Program
Dwells
Combined Tool Motions
SETUP RELATED CHANGES
SUMMARY
Chapter 25
REFERENCES
G-CODES AND M-FUNCTIONS
Milling - G-codes
Milling - M-functions
G-CODES AND M-FUNCTIONS
Turning - G-codes
Turning - M-functions
DECIMAL EQUIVALENTS
PARAMETERS CLASSIFICATIONS
COMMON ABBREVIATIONS
TAP DRILL SIZES
Metric Threads - Coarse
Metric Threads - Fine
Imperial Threads - UNC/UNF
Straight Pipe Taps - NPS
Taper Pipe Taps - NPT
60-DEGREE THREAD FORMS
USEFUL FORMULAS
Speeds and Feeds
Machining Holes - Spot Drilling
Tapers
Control Memory Capacity
Trigonometric Chart
Index
| 1 | CONCEPTS OF CNC MACHINING |
Making a certain part (also called a workpiece) does not normally start at the CNC machine - it starts much earlier, at the design engineer’s desk. Engineering design means developing an intended part that is economical to make, of high quality, as well as a part that does what it is supposed to do - simply, to design a part that works. This process takes place in various offices and laboratories, research centers, and other places, including engineer’s imagination. Manufacturing process - CNC process included - is always a cooperative effort. Modern part design requires professionals from different disciplines, aided by a powerful computer installed with suitable design software, for example, SolidWorks®, Autodesk Inventor®, and many others, as well the venerable AutoCad® - one of the oldest and still very popular of the design group of application software. In simplified terms, engineering design starts with an idea and ends with the development of a drawing - or a series of drawings - that can be used in manufacturing at various stages.
For the CNC programmer as well as the CNC operator, this engineering drawing is the first source, and often the only source, of information about what the final part is to be. Typically, CNC programmer follows a certain process - or workflow - that can be summarized into a several critical points or steps:
▪Evaluate drawing
▪Identify material of the part
▪Determine part holding method
▪Select suitable tools
▪Decide on cutting conditions
▪Write the program
▪Verify the program
▪Complete documentation
▪Send program to machine