The functions of each key on the digital display meter of the milling machine are as follows:

Y key: Used for zeroing operation in the Y-axis direction. After pressing the Y key, the machine tool moves in the Y-axis direction until the digital display shows zero. This function is typically used to adjust the Angle of the workpiece so that it touches the measuring tool and returns to zero, facilitating subsequent precise processing.

In addition, although the issue mainly focuses on the key functions of the digital display meter, the following safety operation norms should also be noted when using the milling machine:

Pre-work inspection: Ensure that all systems of the machine tool are safe and in good working condition, that the positions of all handwheels and rocker handles are correct, that rapid tool entry is unobstructed, and that limit switches can provide safety protection.

Pay attention to the position of the cutting tools and handles: Before starting the vehicle and operating all moving parts, make sure that the cutting tools and all handles are in the required positions. When operating the quick-move handle, start it gently first to confirm that the moving part and direction are consistent. It is strictly forbidden to start it suddenly.

Clean the contact surfaces: When installing the tool holder, bracket, washer, dividing head, vise, etc., ensure that the contact surfaces are clean.

Before starting the machine tool, check whether the cutting tool is securely installed, whether the workpiece is firm, whether the pressure plate is stable, and the shims supporting the pressure plate should not be too high or have too many pieces.

Stop operation: When performing operations such as loading and unloading workpieces, cutting tools, tightening, adjusting, changing speed, and measuring workpieces on the machine tool, it is necessary to stop the machine. When replacing the tool holder, tool disc, vertical milling head or milling cutter, the machine should also be stopped.

Prohibited operation: When the machine tool is in operation, it is not allowed to measure dimensions, align the sample or touch the machined surface by hand. When processing, do not bring your head close to the processing surface to observe the cutting depth. When removing or unloading workpieces, the cutting tool must be moved first.

The above content covers the key functions of the digital display meter on the milling machine and the safety operation norms, which is helpful to ensure the accuracy and safety of the milling machine processing.