Recall & Review
beginner
What does the M30 code do in a CNC program?
M30 stops the program, rewinds it to the start, and resets the machine to be ready for the next run.
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beginner
Where should the M30 code be placed in a CNC program?
M30 should be placed at the very end of the CNC program to signal its completion.
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beginner
True or False: M30 immediately stops the machine without rewinding the program.
False. M30 stops the program and rewinds it to the beginning for the next cycle.
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intermediate
What is the difference between M30 and M02 in CNC programming?
M30 stops the program and rewinds it to the start, resetting the machine. M02 stops the program but does not rewind it.
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beginner
Why is it important to include M30 at the end of a CNC program?
Including M30 ensures the machine stops safely and resets the program, preventing unexpected behavior on the next run.
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What happens when the CNC machine reads the M30 code?
✗ Incorrect
M30 stops the program and rewinds it to the beginning, preparing the machine for the next cycle.
Where is the M30 code usually placed in a CNC program?
✗ Incorrect
M30 is placed at the end of the program to signal its completion.
Which code stops the program but does NOT rewind it?
✗ Incorrect
M02 stops the program but does not rewind it, unlike M30.
Why should you always include M30 at the end of your CNC program?
✗ Incorrect
M30 resets the program and stops the machine safely, preventing errors on the next run.
What does M30 NOT do?
✗ Incorrect
M30 does not start the spindle; it only stops and resets the program.
Explain the purpose and function of the M30 code in CNC programming.
Think about what happens when a CNC job finishes and needs to be ready for the next run.
You got /4 concepts.
Compare M30 and M02 codes in CNC programs and describe when to use each.
Consider what happens after the program stops with each code.
You got /4 concepts.