Hard Jaws
Soft Jaws
Chapter 16
LATHE OFFSETS
Lathe Geometry
Machine Zero
Part Zero
Tool Reference Point
WORK SETUP
Definitions
Geometry Offset
The R and T Columns
Wear Offset
DRAWING AND PROGRAM
Changing Tool Numbers
Bar Extension
MANAGING TOLERANCES
Tolerances and Program Data
Tolerances on Diameters - Part A
Tolerances on Shoulders - Part B
Tolerances on Diameters and Shoulders
WORKING WITH WEAR OFFSETS
Common Offset Change Example
WEAR OFFSET PARAMETERS
Chapter 17
TURNING AND BORING
LATHE CYCLES G70 - G71 - G72
Concepts of Turning and Boring Cycles
Program Listing
Contour Shape - External
G71 Cycle Format for Two Blocks
Contour Shape - Internal
PROGRAM FEATURES TO WATCH
Start Point Location
Clearances
Tool Change Clearance
Program after Changes
PROGRAM DATA TO WATCH
Start Point Too High or Too Low
Positive and Negative Stock Allowance
W-Stock Amount Too Heavy
Return to Start Point in the Cycle
P and/or Q Reference Defined Incorrectly
Feedrates for Roughing and Finishing
Cutter Radius Offset
Small Inside Radius
G72 AND G73 TURNING CYCLES
G72 Lathe Cycle
G72 Cycle Format for Two Blocks
G73 Pattern Repeating Cycle
G73 Cycle Format For Two Blocks
ONE-BLOCK FORMAT CYCLES
G71 Cycle Format for One Block
G72 Cycle Format for One Block
G73 Cycle Format for One Block
G71 TYPE i AND TYPE II CYCLES
Type I
Type II
SUMMARY
Chapter 18
TOOL NOSE RADIUS OFFSET
BRIEF REVIEW
TOOLPATH EVALUATION
Program Listing - No Offset
Program Listing - With Offset
Offset Screen
FACING TO CENTERLINE
Tool Height Error
Incorrect Tool Position
G41 - Yes or No?
OFFSET CHANGE
CLEARANCE AMOUNT
Chapter 19
GROOVING ON LATHES
GROOVE MACHINING
The Simplest Groove
Standard Grooves
Typical Groove
Grooving Tool
Grooving Insert
Control Settings
Program Evaluation
Basic Groove Dimensions
TOLERANCES NOT SPECIFIED
Dimensional Problems
DEPTH CONTROL
External and Internal Grooves
POSITION CONTROL
Left Side Reference Point
Right Side Reference Point
Reference Point Set in the Middle
Offset Adjustment
WIDTH CONTROL
Program Requirements
POSITION AND WIDTH CONTROL
GEOMETRY