Diagnostics

The coolant pressure gauge is the most informative instrument on a gun drilling machine. It tells you about chip evacuation, pump condition, filter status, and drill condition — all in real time. But only if you know what to look for. I have spent years learning to read pressure patterns. Here is what I have found. Where to Measure Pressure The pressure at the pump gauge is not the pressure at the tool tip. I install gauges at two locations: ...

A ballbar test checks the machine geometric accuracy by measuring circular interpolation errors. The test uses a precision ballbar mounted between the spindle and the machine table. The machine runs a circular program and the ballbar measures the deviation from a perfect circle down to micron resolution. In my experience, the ballbar is the single most useful diagnostic tool for verifying machine geometry before running deep hole jobs that demand straightness tolerances under 0.01 mm per 100 mm of depth. ...

Electrical problems on deep hole drilling machines can be frustrating to diagnose. I use a systematic approach to find the root cause quickly and avoid replacing parts that are still good. In my experience, about 70% of electrical issues are simple problems — blown fuses, tripped breakers, or loose connections — but many technicians skip the simple checks and go straight to replacing expensive drive modules. The First 10 Minutes: Power and Safety Checks I have a strict rule: the first 10 minutes of troubleshooting are spent on power and safety checks only. No multimeter, no schematics, no drive module swaps. This is where most problems are found. ...