Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-40 minutes

Alarm 61601

Siemens 840D 61601 - Channel block: Finished part diameter too small

The programmed radius of the machined part is too small. Alarm triggered by following cycles: CYCLE94, CYCLE96. Remedy: Check parameter SPD or DIATH.

Siemens SINUMERIKServo/AxisIntermediate20-40 minutes

61601

Siemens 840D 61601 - Channel block: Finished part diameter too small

Channel block: Finished part diameter too small

The programmed radius of the machined part is too small. Alarm triggered by following cycles: CYCLE94, CYCLE96. Remedy: Check parameter SPD or DIATH.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Programmed part diameter is smaller than the minimum allowable diameter defined in cycle parameters
  • SPD (spindle diameter) parameter set incorrectly or too small for the intended operation
  • DIATH (diameter threshold) parameter value is below the actual part dimensions being machined
  • Tool or chuck geometry constraints preventing smaller diameter machining
  • Incorrect cycle selection (CYCLE94 or CYCLE96) for the intended part size

Troubleshooting Steps

  1. 1Review the part program block referenced in the alarm message and verify the programmed diameter matches the drawing specifications
  2. 2Check SPD parameter setting in the active cycle and compare against the minimum required diameter for the operation
  3. 3Verify DIATH parameter value is appropriately set below the target finished part diameter
  4. 4Inspect physical tool and chuck setup to confirm they can accommodate the programmed diameter without interference
  5. 5Re-run the cycle after parameter corrections and monitor first pass to ensure diameter is achieved without re-triggering the alarm

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