Horizontal‑Spindle Rotary‑Table Surface Grinder: Troubleshooting for Unresponsive CNC Axis, 3 Key Inspection Points

Sudden non‑response of CNC axes is a frequent fault in the electrical control system of horizontal‑spindle rotary‑table surface grinders. The following three items are recommended for priority inspection.

First, check whether the connecting screws on the coupling between the servo motor and lead screw are loose, which is a common cause of axial‑motion failure. During long‑term operation of the horizontal‑spindle rotary‑table grinder, vibration may loosen coupling screws. Restore normal function by adjusting the clearance of worktable moving guideways until each axis moves flexibly.

Second, check alarm codes of the CNC system and the status of drives. Interpretation of servo‑motor alarm codes is critical for rapid troubleshooting of rotary‑table surface grinders. Taking the frequently‑triggered overload protection as an example, apart from checking mechanical load, observe current‑waveform distortion with an oscilloscope. Abnormal harmonic components usually indicate improper drive‑parameter settings or interruption of encoder feedback. Always verify the actual transmission ratio of the reducer before resetting the electronic gear ratio.

Third, check for logic errors in PLC program execution. Although the PLC control system of the horizontal‑spindle rotary‑table grinder features high automation, disordered action sequences may occur occasionally. Track signal‑status changes step‑by‑step with a ladder‑diagram monitoring tool, focusing on whether safety interlock conditions within the emergency‑stop circuit are falsely triggered. Run the dry‑run self‑check routine before daily startup, observe axis‑movement smoothness and locations of abnormal noise sources, so as to detect potential problems in advance.