When operating a Mazak machine on a daily basis, correctly setting the tool magazine zero point is key to ensuring accurate tool changes. While the procedure may vary slightly between models, the following step-by-step guide uses the Mazak VCN515-III as an example to walk you through both mechanical and electrical zero point settings.


I. Mechanical Zero Point Setting Steps
    1.    Enter Maintenance Mode
    •    Switch to Manual Mode, then press the Maintenance Key to enter the maintenance menu.
    •    Select the ATC Project Key or F0 Key, then use the Magazine Forward/Reverse Key to rotate Tool Pot #1 to the current position.
    2.    Fine Position Adjustment
    •    Use the jog keys to fine-tune the magazine position.
    •    Ensure the alignment rod can easily be inserted into the hole between Tool Pot #1 and the magazine support bracket.


II. Electrical Zero Point Setting Steps
    1.    Modify PLC Parameters
    •    Navigate: Position → Right Expansion → Parameters → PLC Parameters → RB
    •    Move the cursor to RB12, then shift right to bit 6, and change RB12#6 from 0 to 1.
    •    Power off the machine for 10 seconds, then restart. A warning such as “Tool Magazine Drive Error” may appear (this can be ignored at this stage).
    2.    Zero Point Reset Operation
    •    Re-enter the Maintenance Menu, press F0 Key, and hold MF1 + MF2 together.
    •    Press both the Tool Magazine Zero Point Key and Tool Magazine Zero Point Set Key.
    •    Release MF1 + MF2, rotate the magazine until the Tool Magazine Zero Point Key turns off.
    •    Again hold MF1 + MF2, rotate the magazine until the Tool Magazine Zero Point Set Key light turns off.
    •    Power off for 10 seconds, then restart.
    3.    Verification and Finalization
    •    After startup, if no alarms are present, press F0 Key + Tool Magazine Zero Return Key. The magazine should automatically rotate one full turn and stop at Tool #1.
    •    Finally, revert RB12#6 back to 0, power off, and restart the machine. Confirm that the tool change function is working properly.


Important Reminders
    1.    Safety First: Always power off the machine before performing any operation, and wear proper protective equipment.
    2.    Refer to the Manual: Since procedures may vary between models, always refer to the official operation manual.
    3.    Error Handling: If errors persist after setting, it’s recommended to contact professional support or a qualified engineer for troubleshooting.

Regularly calibrating the tool magazine zero point can extend the machine’s life and reduce tool change errors.