330-00F7

Check standstill monitoring parameters

Access MOD function and check MP1020 (standstill window) and MP1021 (standstill delay time). Verify values are appropriate for your machine dynamics.

Typical values: MP1020 = 0.01mm, MP1021 = 0.1 seconds

Verify axis following error

In the position display, check the following error values during deceleration. Excessive following error can prevent proper standstill detection.

Following errors above 0.1mm indicate servo tuning issues

Adjust deceleration parameters

Check MP1142 (maximum deceleration) and ensure adequate deceleration time before tool change. Consider adding G09 exact stop before M06.

Use G09 or program dwell G04 P0.5 before tool change to ensure complete stop

Check probe cycle parameters

Verify touch probe parameters in the TOUCH PROBE menu. Check that probe deflection monitoring (MP6130) is properly configured.

MP6130 should be set to 1 for proper probe deflection monitoring

Examine axis group configuration

Check MP1010 to verify which axes belong to the same kinematic group. All axes in the group must be stationary during probing.

Never modify MP1010 without understanding complete machine kinematics

Review probing feedrate and approach

Reduce probing feedrate (F parameter in probing cycle) and ensure proper approach distance to allow complete deceleration before contact.

Use F100-200 for rough probing, F20-50 for precise measurements

Monitor position feedback signals

Use the oscilloscope function in the TNC to monitor encoder feedback during positioning moves. Check for oscillation or drift after commanded stop.

Access via Setup > Service > Oscilloscope, monitor actual position vs. nominal position

Check servo amplifier status

Examine servo drive LEDs and digital inputs. Verify 'Axis OK' and 'In Position' signals from drives are properly connected to TNC inputs.

Ensure proper electrical isolation when checking servo connections

Verify mechanical binding

Manually move axes to check for mechanical resistance, worn ways, or inadequate lubrication causing position instability.

Check way oil pressure and flow rates - insufficient lubrication causes stick-slip motion

Check spindle orientation parameters

Verify MP3210 (spindle orientation angle) and MP3211 (orientation tolerance). Ensure spindle reaches exact position before tool change.

Typical orientation tolerance MP3211 = 1-2 degrees maximum

Monitor spindle position feedback

Check spindle encoder signals and verify C-axis position display shows stable reading after M19 command.

Spindle encoder problems can cause continuous micro-movements

Adjust spindle brake timing

Check MP3220 (brake engagement delay) to ensure spindle brake engages after orientation is complete but before tool change begins.

Program G04 P1.0 after M19 to allow complete spindle settling before tool change

Check PLC axis enable logic

Review PLC program for axis enable output stability. Verify M7120-M7127 (axis enable) outputs remain stable during operations.

Use PLC program trace function to monitor axis enable signal timing

Verify digital input wiring

Check wiring integrity of servo drive 'ready' and 'in-position' signals to TNC digital inputs. Look for loose connections or EMI interference.

Power down system before checking digital input connections

Test input signal quality

Use TNC diagnostic display to monitor digital input states in real-time. Check for flickering or unstable signals during axis motion.

Access via Setup > Service > Digital Inputs to monitor signal stability