Siemens SINUMERIK measurement cycle configuration

L979- Arbitrary Angle Measurement: When the workpiece features (such as holes) are not parallel to the machine axis, L979 determines the center of the circle by measuring the circle at three or four points. Cycle the use of circular interpolation (G02/G03) to move between measurement points, and use the M19 function to position the spindle at a specific angle at each point, ensuring that the same side of the measuring ball is always used for detection, thereby eliminating the pointing error of the measuring head itself.

Angle measurement (L978)

One unique function of the L978 cycle is to determine the clamping angle of the workpiece on the machine worktable. By measuring two points (MP1, MP2) on the straight edge of the workpiece, the angle between that edge and the machine reference axis (R24 set value) can be calculated in a loop. The calculated angle difference can be automatically written into the coordinate rotation function (G58) to align the subsequent machining coordinate system with the actual position of the workpiece.

Result recording and troubleshooting

Measurement result recording: The system supports outputting measurement results (such as actual dimensions, deviations, and measurement point coordinates) in tabular form to the printer through the CP315 communication module or a dedicated recording module. Users can customize report formats (such as headers, variables, and table lines) through control parameters such as R39, which is crucial for quality traceability and production document recording.

Common alarms and handling: The document provides a detailed list of various alarm numbers and their causes, and understanding these is the key to efficiently solving problems.

4010 "Probe is defective": The probe emits a trigger signal before the measurement path begins. Usually it is a set point error (the probe has been pressed down) or a malfunction of the probe itself.

4011 "Probe does not switch": The probe has completed the entire measurement path 2a without triggering. Usually it is due to the set point being too far away or the probe being damaged.

4030 "Safe area exceeded": The measured deviation is greater than the safe area defined by R36. The measurement results are not accepted, usually due to chips or probe errors triggering at the measurement point.

4040/4041 "Oversize/Understand": The dimensions exceed the workpiece tolerance defined by R40/R41. The program will sound an alarm, but if R10>0, the tool will still be compensated and the operator can decide whether to continue machining.