Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 61525

Siemens 840D 61525 - Channel block: Incorrect grinding wheel type

The alarm can be triggered by the following grinding cycle: CYCLE413 Remedy: Change grinding wheel type $TC_TPC1

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

61525

Siemens 840D 61525 - Channel block: Incorrect grinding wheel type

Channel block: Incorrect grinding wheel type

The alarm can be triggered by the following grinding cycle: CYCLE413 Remedy: Change grinding wheel type $TC_TPC1

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Grinding wheel type parameter in $TC_TPC1 does not match the wheel physically installed on the machine
  • CYCLE413 grinding cycle called with incompatible wheel type configuration
  • Parameter $TC_TPC1 not updated after physical wheel replacement
  • Incorrect wheel type code entered in the tool compensation table
  • Tool offset or wheel geometry data mismatch in the part program

Troubleshooting Steps

  1. 1Verify the physical grinding wheel type installed on the spindle matches the machine documentation and specification
  2. 2Access the tool compensation data and check parameter $TC_TPC1 value against the installed wheel type code
  3. 3Update $TC_TPC1 to the correct grinding wheel type code corresponding to the physically mounted wheel
  4. 4Review the CYCLE413 call in the active part program to confirm it references the correct wheel type parameter
  5. 5Clear the alarm, reset the CNC, and re-run the grinding cycle to verify the correction

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Always verify with your machine manual or a certified technician before performing service procedures.