What causes Siemens SINUMERIK alarm 61104?

Slot width or depth parameters exceed machine tool capabilities or workpiece geometry constraints. Circular slot positioning parameters (angle, radius, or number of slots) create geometric conflicts or overlaps. SLOT1, SLOT2, or LONGHOLE cycle parameters reference invalid or incompatible tool geometry. Contour offset calculations generate tool paths that violate part boundaries or machine workspace limits. Mismatch between programmed slot pattern and actual workpiece design intent or CAM output.

How do I fix Siemens SINUMERIK alarm 61104?

1. Review the active cycle call (SLOT1, SLOT2, or LONGHOLE) in the NC program block %2 and verify all slot geometry parameters against workpiece drawing specifications 2. Check machine tool workspace limits and ensure slot positioning parameters (angle increments, radius values, slot count) do not create conflicts with chuck, fixture, or machine boundaries 3. Validate tool diameter and tool offset values are correctly set and compatible with the smallest slot width or feature in the pattern 4. Re-examine CAM post-processor output for the slotting cycle to confirm parameter syntax and value ranges match Siemens cycle documentation 5. Simulate the NC program in the control's graphics simulation mode to visualize the tool path and identify the specific geometric violation causing the alarm

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-60 minutes

Alarm 61104

Siemens 840D 61104 - Channel block: Contour violation of grooves

Incorrect parameterization of the milling pattern in the parameters which define the position of the slots/elongated holes on the circle and their form. Alarm triggered by following cycles: SLOT1, SLOT2, LONGHOLE.

Siemens SINUMERIKServo/AxisIntermediate30-60 minutes

61104

Siemens 840D 61104 - Channel block: Contour violation of grooves

Channel block: Contour violation of grooves

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

Slot width or depth parameters exceed machine tool capabilities or workpiece geometry constraints
Circular slot positioning parameters (angle, radius, or number of slots) create geometric conflicts or overlaps
SLOT1, SLOT2, or LONGHOLE cycle parameters reference invalid or incompatible tool geometry
Contour offset calculations generate tool paths that violate part boundaries or machine workspace limits
Mismatch between programmed slot pattern and actual workpiece design intent or CAM output

Troubleshooting Steps

1Review the active cycle call (SLOT1, SLOT2, or LONGHOLE) in the NC program block %2 and verify all slot geometry parameters against workpiece drawing specifications
2Check machine tool workspace limits and ensure slot positioning parameters (angle increments, radius values, slot count) do not create conflicts with chuck, fixture, or machine boundaries
3Validate tool diameter and tool offset values are correctly set and compatible with the smallest slot width or feature in the pattern
4Re-examine CAM post-processor output for the slotting cycle to confirm parameter syntax and value ranges match Siemens cycle documentation
5Simulate the NC program in the control's graphics simulation mode to visualize the tool path and identify the specific geometric violation causing the alarm

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