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FANUC Controller
Program/G-code · Intermediate · 5-30 minutes
Fanuc 333 - Peck drilling parameter error
Alarm 333 occurs when the CNC detects invalid parameter values or missing data in a G83 (peck drilling) or G73 (high-speed peck drilling) cycle. This is typically caused by incorrect Q value specification, missing required addresses, or logically impossible parameter combinations that prevent the cycle from executing.
333
Fanuc 333 - Peck drilling parameter error
PECK DRILLING PARAMETER ERROR
Fanuc PS program alarm 333: PECK DRILLING PARAMETER ERROR. This alarm is triggered by an illegal or incorrectly formatted command in the part program, or a programming condition that the Fanuc control cannot execute.
Root Cause Summary
Alarm 333 occurs when the CNC detects invalid parameter values or missing data in a G83 (peck drilling) or G73 (high-speed peck drilling) cycle. This is typically caused by incorrect Q value specification, missing required addresses, or logically impossible parameter combinations that prevent the cycle from executing.
Safety
- Verify corrected program or parameters before resuming machining
Causes and Fixes
- 1
Locate the G83 or G73 block in the program that triggered the alarm and identify the Q parameter value.
- 2
Verify Q is present in the drilling cycle block - add it if missing (e.g., G83 X__ Y__ Z__ R__ Q__ F__).
- 3
Confirm Q value is positive and less than the total drilling depth (absolute value of Z minus R).
- 4
Edit the Q value to a valid peck increment (typically 0.1 to 5.0 depending on material and tool size), then reset alarm and restart program.
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