Checks built into the post
| Check | Post action |
|---|---|
| Travel limits exceeded | Error or warning with operation name |
| Spindle speed / feed above machine max | Clamp and warn, or stop posting |
| Tool number not in machine's range | Error |
| Rotary limit violation | Warning, retract/rewind inserted |
| Unsupported cycle or arc | Expand safely and note in log |
| Missing work offset | Error |
Pre-run checklist for each program
[ ] Correct post and machine selected
[ ] Posting log has no errors or unexplained warnings
[ ] Simulated (posted G-code) with correct stock, fixture, holders
[ ] Tool list matches tools in the machine
[ ] Work offsets match the setup sheet
[ ] Program number / name correct and not overwriting another
[ ] Stick-out lengths match the simulationFirst run on the machine
- Check tool lengths and offsets on the controller.
- Run with reduced rapid override and single block through the first moves of each tool.
- Watch distance-to-go on approach moves.
- Stop and investigate anything unexpected; don't "try again".
Make it routine
Verification works best when it is routine and quick. Post warnings, automatic setup sheets and simulation built into the CAM workflow make checks fast enough to do every time.
The cheapest place to find an error is in the posting log. The most expensive is inside the machine.
Build verification into your posts
See our CNC post processor development service and how to validate and test a post.