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Siemens SINUMERIK Controller
Servo/Axis · Basic · 10-20 minutes
Siemens 840D 14830 - Channel block wrong feed type selected
G97 has been programmed in the displayed block although G96 was not (or G97 already) active previously.
14830
Siemens 840D 14830 - Channel block wrong feed type selected
Channel block wrong feed type selected
G97 has been programmed in the displayed block although G96 was not (or G97 already) active previously.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Common Causes
- G97 command programmed without prior G96 activation in the part program
- Operator manually selected G97 feed mode when G96 constant surface speed was not previously established
- Program logic error where G97 spindle speed mode is called before switching from G96
- Incomplete or corrupted NC program section missing required feed mode initialization
- Incorrect post-processor output generating G97 commands without proper G96 preamble
Troubleshooting Steps
- 1Review the NC program block sequence around the alarm trigger point to verify G96 is programmed before any G97 command
- 2Check program preamble section to confirm G96 constant surface speed mode is established as default feed type before G97 is invoked
- 3If using manual MDI mode, ensure G96 is active in the machine before attempting G97 spindle speed mode selection
- 4Verify post-processor settings if program is generated by CAM software; confirm G96 initialization is included in output file header
- 5Edit the NC program to insert G96 command in the appropriate block prior to G97, then reload and restart the cycle
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Always verify with your machine manual or a certified technician before performing service procedures.