Applicable Systems
1020
1040
1060
Symptoms
Alarm 75: Switch from state G20 to G21 or G22: last block in G20 incomplete as it is programmed in PGP or radius correction or with X £ 0 first block in G21 without X and Y or G22 without Y and Z Switch from state G21 or G22 to G20: last block in G21 or G22 incomplete or first block in G20 in mode G41 or G42: In G21 or G22, initial radius negative or zero. The NUM NUM 1020/1040/1060 CNC system displays this alarm on the operator panel.
Possible Causes
- Refer to the machine manual for detailed cause analysis
- Check related sensors, switches, and parameters
Troubleshooting Steps
- Step 1: Read alarm 75 on the CNC display and note the full alarm message
Alarm code and description displayed for diagnosis - Step 2: Check the machine status and identify any obvious mechanical, electrical, or pneumatic issues
Visible faults identified or confirmed as intermittent - Step 3: Consult the manufacturer manual for alarm-specific troubleshooting procedures
Root cause identified per manufacturer guidelines - Step 4: Apply the recommended fix and reset the alarm
Alarm cleared and machine resumed normal operation
How to Reset
To reset alarm 75: 1) Address the root cause. 2) Press the RESET key on the CNC panel. 3) If the alarm persists, cycle power to the control. Caution: Repeated alarms without fixing the cause may cause damage.
Frequently Asked Questions
- Q: What does alarm 75 mean?
Alarm 75 corresponds to: Switch from state G20 to G21 or G22: last block in G20 incomplete as it is programmed in PGP or radius correction or with X £ 0 first block in G21 without X and Y or G22 without Y and Z Switch from state G21 or G22 to G20: last block in G21 or G22 incomplete or first block in G20 in mode G41 or G42: In G21 or G22, initial radius negative or zero. This is a NUM 1020/1040/1060 system alarm that typically requires checking machine state and the manufacturer manual.
Comments (0)
Share your experience to help others facing the same problem.
Leave a Comment
Source: HelmanCNC.com - https://www.helmancnc.com/num-cnc-control-errors-list/
Category: CNC
No comments yet. Be the first to share your experience!