G-Code Fundamentals
What does G00 do?
Rapid positioning (non-cutting move)
Which parameter defines depth in cycles?
Z
Machine does not move in G01
Missing feed rate or feed override is zero
Mode used to execute a stored program
MEM (Memory Mode)
What must be selected before pressing CYCLE START?
MEM or MDI mode
What is CAM used for?
Generate toolpaths for CNC machining
Toolpath for flat surface machining
Facing
What is post-processing?
Converting CAM toolpaths into G-code
Difference between G01 and G00
G01 is controlled feed (cutting), G00 is rapid motion
What do F and S represent?
F = feed rate, S = spindle speed
Tool breaks during entry
Incorrect feed or spindle speed
Mode used to manually input and execute single commands
MDI (Manual Data Input)
What happens if you press RESET during execution?
Program stops and resets to beginning
Difference between CAD and CAM
CAD designs geometry, CAM generates machining
Toolpath for internal cavities
Pocketing
Why is a post-processor needed?
Each CNC machine has specific format
What do G02 and G03 do?
Circular interpolation CW and CCW
What is a Work Offset (G54)?
Defines the part coordinate system
Incorrect arc motion
Wrong I, J values or plane selection
Mode used to modify CNC programs
EDIT
Risk of running directly in MEM without verification
Collision or tool damage
What is a feature in SolidWorks CAM?
Recognized machinable geometry (hole, pocket, face)
Toolpath for cutting external profile
Contouring
Output of CAM software
G-code program
Which code sets units to millimeters?
G21
Codes for cutter compensation
G42
Chatter during machining
Poor cutting parameters or tool condition
Mode used to move axes manually
JOG
Which key is used to enter simulation mode in a Haas CNC?
GRAPHICS
What is Technology Database (TechDB)?
Stores machining strategies and parameters
Difference between roughing and finishing
What happens if wrong post-processor is used?
Machine errors or incorrect motion
What is the difference between G90 and G91?
Absolute vs incremental positioning
Relationship between machine zero and work zero
Offsets define the transformation between them
Unexpected collision
Error in offsets, mode, or program logic
Mode used to load programs via USB or network
LIST PROG / EDIT (depending on controller usage)
What must be selected before entering GRAPHICS mode?
A valid program loaded in MEM mode
What is automatic feature recognition?
System identifies machinable features automatically
Why use multiple passes?
Reduce tool load and improve surface quality
Relation between CAM and CNC controller
CAM generates instructions, controller executes