250-17D3

Stop all axis motion

Press STOP key or Internal Stop to halt current program execution and manual movements.

Ensure safe stopping distance before executing emergency stop

Verify axis standstill

Check position display shows stable values with no motion indicators active in the TNC status line.

Look for flashing position values which indicate ongoing movement

Execute reference run

Press REF key, select affected axis, then press NC Start to begin reference sequence.

Use REF ALL function to reference all axes simultaneously if multiple axes need referencing

Stop spindle operation

Execute M05 or press Spindle Stop key to halt spindle rotation completely.

Check MP3003 spindle parameters if spindle won't stop properly

Check auxiliary axis status

Verify rotary axes (A, B, C) are not in motion via Manual Operation mode position display.

Use machine parameter MP1020 to check auxiliary axis configuration

Clear all axis activities

Ensure all programmed auxiliary functions are complete before attempting reference run.

Verify workpiece and tooling clearance before stopping auxiliary axes

Retry reference sequence

Access Manual Operation mode, select REF function, choose specific axis and execute reference run.

Reference linear axes first, then rotary axes in sequence

Complete tool change cycle

Allow current M06 tool change command to finish completely before attempting reference run.

Never interrupt tool change cycle - can cause mechanical damage

Check tool magazine status

Verify magazine positioning is complete via PLC status or machine manufacturer's diagnostic screen.

Check MP7440-7449 for tool changer configuration parameters

Reset tool changer if needed

Use machine-specific tool changer reset function if magazine appears stuck or incomplete.

Consult machine parameter MP7411 for tool change monitoring settings

Execute reference run

Once tool systems are idle, proceed with standard REF procedure in Manual Operation mode.

Consider referencing Z-axis first to establish safe tool clearance height

Check safety door status

Verify all machine enclosure doors and guards are properly closed and latched.

Never bypass safety interlocks - serious injury can result

Review PLC status display

Access PLC diagnostics via Setup menu to identify active interlock conditions.

Use MOD function to access machine manufacturer's PLC diagnostic screens

Clear interlock conditions

Address identified safety or operational interlocks according to machine documentation.

Check machine parameters MP7600-7699 for PLC interface configuration

Verify system ready state

Confirm all status indicators show ready condition before attempting reference run.

Look for green ready indicators and absence of warning messages in TNC status line

Check encoder cable connections

Inspect encoder cables at motor and TNC connection points for damage or loose connections.

Power down system before checking electrical connections

Verify encoder parameters

Check machine parameters MP4020-4029 for correct encoder configuration and reference mark settings.

Compare current settings with machine documentation or backup parameters

Test encoder functionality

Use TNC diagnostic functions to monitor encoder signals during manual axis movement.

Access encoder diagnostics through Setup > Service > Encoder Test functions

Perform encoder calibration

Execute encoder reference mark search procedure if encoder signals are stable.

Ensure adequate axis travel range for reference mark search sequence