280-07D1

Access wheel position table

Navigate to MOD > Tables > WHEEL.PGW to view current wheel position status.

Use soft key 'SHOW ALL' to display complete position matrix

Check position status column

Review the STATUS column in WHEEL.PGW table - look for positions marked as 'FREE' or '0' instead of 'OCCUPIED' or '1'.

Do not modify positions that actually contain grinding wheels

Release occupied positions manually

Select empty physical positions and change STATUS from '1' to '0' using the TNC keyboard, then press ENT to confirm changes.

Cross-reference physical wheel magazine with table data before making changes

Execute table update

Press PGM MGT key, select WHEEL.PGW, and use 'SAVE' soft key to write changes to control memory.

Backup current table

Navigate to PGM MGT > Tables > WHEEL.PGW and use 'COPY' soft key to create backup file WHEEL_BAK.PGW.

Always backup before modifying system tables

Reset table to defaults

Access MOD mode, select WHEEL.PGW, use 'RESET TABLE' soft key to restore factory default position settings.

Note down current wheel positions before reset for manual re-entry

Reconfigure wheel positions

Manually enter actual grinding wheel data: position number, wheel type, diameter, and set STATUS=1 for occupied positions, STATUS=0 for empty.

Use wheel diameter measurement function via MP7411 for accurate data entry

Validate table integrity

Execute wheel magazine reference cycle using M06 T0 to verify table communication with physical magazine positions.

Check MP7420 setting

Navigate to MOD > Machine Parameters > MP7420 to verify total wheel magazine positions matches physical magazine capacity.

Common values are 12, 16, or 24 positions depending on magazine type

Verify MP7421 wheel position offset

Check MP7421 (first wheel position number) matches your wheel numbering scheme - typically set to 1 or 101.

Changing MP7421 requires complete WHEEL.PGW table reconfiguration

Update machine parameters

Modify MP7420 to correct value, press ENT, then use 'SAVE PARAMETERS' soft key to store changes permanently.

Machine parameter changes require control restart to take effect

Restart TNC control

Perform controlled shutdown via MOD > RESET, then power cycle control to activate new magazine parameters.

Check PLC status markers

Navigate to MOD > PLC > Status to view wheel magazine PLC markers M4200-M4299 for position status communication.

M4200 typically represents wheel position 1 status

Verify magazine reference position

Execute manual magazine reference using PLC function 'WHEEL REF' to re-establish position communication.

Ensure magazine is clear of obstructions before referencing

Reset PLC wheel module

Access PLC > Functions > WHEEL RESET to reinitialize wheel magazine PLC communication module.

Monitor PLC error log during reset for additional diagnostic information

Test position detection

Manually insert/remove wheel from known position and verify corresponding PLC marker changes state in real-time.

Visual sensor inspection

Inspect wheel magazine position sensors for contamination, damage, or misalignment while magazine is in service position.

Lock out magazine rotation before inspection

Clean sensor surfaces

Use compressed air and lint-free cloth to clean optical sensors or proximity sensor faces, removing grinding debris and coolant residue.

Use appropriate sensor cleaner - avoid solvents on plastic sensor housings

Test sensor functionality

Use PLC diagnostic mode to monitor individual sensor inputs while manually triggering each position sensor.

Follow lockout/tagout procedures when accessing magazine mechanism

Replace faulty sensors

Replace any sensors showing inconsistent or no response, ensuring proper cable connections and sensor alignment per manufacturer specifications.