500

Navigate to POSITION screen and note the current Machine Coordinate position of the alarmed axis. Compare this value against parameter No. 1326 (positive stored stroke limit) found at SYSTEM > PARAM > search for parameter 1326.

Verify parameter No. 1320 bit 0 (SLS) is set to 1 to enable stored stroke check. If bit 0 = 0, the stored stroke check is disabled and alarm should not occur. Check SYSTEM > PARAM > 1320.

Parameter modification requires parameter write enable (PWE) bit 1 in parameter 0000 to be set. Turning PWE on/off requires machine restart.

Review the active work coordinate offset (G54-G59) at OFFSET/SETTING > WORK screen and tool length offset at OFFSET/SETTING > TOOL OFS screen. Calculate total commanded position: Machine Zero + Work Offset + Tool Offset + Programmed Position.

If program is correct, adjust parameter No. 1326 for the affected axis to a larger positive value within safe machine travel limits. Verify mechanical hard limits via parameter No. 1321 (+OT) are not exceeded.

Always confirm physical machine travel capability and proximity switch locations before increasing software limits. Exceeding mechanical limits can cause crash damage.

Check OFFSET/SETTING > WORK screen and verify all active work offset values for the alarmed axis. Look for unusually large positive values or recent changes that may have been entered incorrectly.

Check OFFSET/SETTING > TOOL OFS screen (GEOM for geometry offset, WEAR for wear offset). Verify the tool offset for the active tool number is correct. Confirm combined GEOM + WEAR offset is reasonable.

Temporarily cancel all offsets by commanding G53 (machine coordinate system) in MDI mode and jog axis to verify stored stroke limits are correctly set. If alarm does not occur in G53, offsets are the cause.

G53 commands motion in machine coordinates. Ensure tool/work clearance before jogging in G53 mode.

Correct the erroneous offset values and re-run the program in single block mode with feed rate override at low percentage to verify complete toolpath remains within limits.

Review the NC program at the block where the alarm occurred (check PROGRAM > current line display). Verify the commanded axis position value is appropriate for the machine travel and intended operation.

Enable SYSTEM > DIAGNOSIS screen and check diagnostic No. 300-307 (commanded position) and No. 320-327 (absolute position) for the alarmed axis to see the actual commanded machine position at alarm occurrence.

Use DRY RUN mode with feed hold to simulate program execution. Monitor machine coordinates on POSITION screen to identify where the command exceeds limits without actual machine movement.

Verify parameter No. 1401 bit 1 (DRN) is set to 1 to enable dry run function. In dry run, rapid traverse and cutting feed execute at dry run feedrate.

Correct the program coordinates or select appropriate work offset (G54-G59) that positions the part within machine travel envelope. Re-verify with graphical simulation if available.