Programming & Machine Operation Flashcards

What does the CNC G02 code command the machine to do?

Answer: Perform a clockwise circular interpolation

G02 commands the machine to move in a clockwise arc, while G03 commands counterclockwise arc motion.

In CNC programming, what is the purpose of the I and J address words used with G02/G03?

Answer: They define the incremental distance from the arc start to the arc center

I and J are incremental offsets from the arc start point to the arc center in the X and Y axes respectively.

Which modal group do G00 and G01 belong to, and what does this mean?

Answer: Group 1; only one code from the group can be active at a time

G00 and G01 are both in modal Group 1 (motion group), so activating one cancels the other.

A CNC operator needs to drill 10 holes using a canned cycle. Which code initiates a standard drilling canned cycle?

Answer: G81

G81 is the standard drilling canned cycle that plunges to depth and retracts at rapid speed.

What is the function of G83 in CNC machining?

Answer: Peck drilling cycle that retracts fully to clear chips

G83 is a peck drilling cycle that fully retracts to the R plane between pecks to clear chips from deep holes.

When programming with tool length compensation using G43, what does the H address specify?

Answer: The tool length offset register number

H specifies the tool length offset register number stored in the controller's offset table.

In a CNC program, what does the block 'N100 G28 G91 Z0' accomplish?

Answer: Returns the Z axis to the machine home position incrementally

G28 with G91 (incremental mode) and Z0 commands the Z axis to return to the machine reference (home) position through the current position.