What causes Siemens SINUMERIK alarm 10770?

Tool orientation changes between blocks causing corner type classification to shift from inside to outside corner or vice versa. Rapid orientation changes in 5-axis programming without proper corner handling compensation. Conflict between programmed path geometry and dynamic tool orientation vectors. Incorrect or missing corner rounding/chamfer specifications when orientation transitions occur. Tool vector calculations causing projection plane misalignment relative to intended cutting path.

How do I fix Siemens SINUMERIK alarm 10770?

1. Review the NC program around the specified block number for tool orientation commands (A, B, C axis or vector statements) and verify orientation changes align with intended corner geometry 2. Check corner definition in the CAM post-processor output to ensure corner type (inside/outside) is explicitly programmed or that automatic corner detection is properly configured 3. Examine tool orientation transitions and add intermediate positioning blocks or corner rounding parameters (RNDM, BEVEL, or CHF) to stabilize corner type through orientation changes 4. Verify the tool table contains correct tool geometry and that the tool offset compensation is appropriate for the 5-axis path 5. Simulate the program in the Siemens ShopMill or ShopTurn environment with graphics display enabled to visualize the tool orientation relative to the cutting path and identify where corner type changes occur

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-60 minutes

Alarm 10770

Siemens 840D 10770 - Channel block change of corner type due to change of orientation

The type of a corner (inside or outside corner) depends not only on the programmed path but also on the tool orientation. For this purpose, the programmed path is projected in the plane perpendicularly to the actual tool orientation and the corner type is determined there. If a change in orientation

Siemens SINUMERIKServo/AxisIntermediate30-60 minutes

10770

Siemens 840D 10770 - Channel block change of corner type due to change of orientation

Channel block change of corner type due to change of orientation

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

Tool orientation changes between blocks causing corner type classification to shift from inside to outside corner or vice versa
Rapid orientation changes in 5-axis programming without proper corner handling compensation
Conflict between programmed path geometry and dynamic tool orientation vectors
Incorrect or missing corner rounding/chamfer specifications when orientation transitions occur
Tool vector calculations causing projection plane misalignment relative to intended cutting path

Troubleshooting Steps

1Review the NC program around the specified block number for tool orientation commands (A, B, C axis or vector statements) and verify orientation changes align with intended corner geometry
2Check corner definition in the CAM post-processor output to ensure corner type (inside/outside) is explicitly programmed or that automatic corner detection is properly configured
3Examine tool orientation transitions and add intermediate positioning blocks or corner rounding parameters (RNDM, BEVEL, or CHF) to stabilize corner type through orientation changes
4Verify the tool table contains correct tool geometry and that the tool offset compensation is appropriate for the 5-axis path
5Simulate the program in the Siemens ShopMill or ShopTurn environment with graphics display enabled to visualize the tool orientation relative to the cutting path and identify where corner type changes occur

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