# Mazak Lathe: Locating Program Zero 275

This class discusses the various coordinate systems involving machine components and the considerations for selecting workpiece zero.

details Other tabs

## Class Details

Class Name:
Mazak Lathe: Locating Program Zero 275
Difficulty:
Intermediate
Number of Lessons:
11
Spanish

## Class Outline

• Objectives
• What Is a Coordinate System?
• The Machine Coordinate System
• Homing: Finding the Machine Zero Point
• The Workpiece Coordinate System
• Selecting Workpiece Zero
• Calculating the Z-Offset Value
• Viewing the Z Offset
• Setting Program Zero Automatically: Teach
• Tool Reference
• Summary

## Objectives

• Describe a coordinate system.
• Describe the machine coordinate system.
• Describe the steps for homing the axes.
• Define the workpiece coordinates system.
• Describe selecting workpiece zero.
• Describe how to calculate the Z-offset value.
• List the steps for viewing the Z offset.
• List the steps for setting program zero automatically with the teach function.
• List the steps for setting program zero automatically with a probe.
• Describe tool reference.

## Glossary

Vocabulary Term Definition
all home return A button found on the machine controls section of some Matrix panels that will automatically send all axes to machine zero once the machine has been manually stopped.
centerline An imaginary line that runs through the center of a cylindrical tool on a turning center.
chuck face In the Z-axis, the surface of the chuck. The chuck face is a possible location for program zero.
coordinate system A numerical system used to describe the location of an object in three-dimensional space. A coordinate system expresses the distance from any point to the fixed intersection of three linear axes: X, Y, and Z.
geometry offset An offset used on a lathe to account for the physical shape of a specific tool. Each tool requires its own geometry offset, which accounts for its length and width.
home mode A mode of the Mazak control that allows the operator to manually return the axes to the machine home position.
home mode key A function key used to return a tool to machine zero.
home position The origin of the machine coordinate system located above the lathe spindle and to the far upper right-hand corner of the lathe work area. The unchangeable home position is also known as the machine zero point.
homing The process of sending the lathe turret to its home or machine zero position.
jaw face In the Z-axis, the surface of the chuck jaws, which is also the surface of the workpiece on the spindle side. The jaw face is a possible location for program zero.
machine coordinate system A fixed coordinate system with the machine zero point as its origin. The machine coordinate system covers the entire range of movement in the lathe's work area and is the basis for the other coordinate systems.
machine zero point The origin of the machine coordinate system located above the lathe spindle and to the far upper right-hand corner of the lathe work area. The unchangeable machine zero point is also known as the home position.
overtravel A situation in which the turret has moved beyond its set boundaries.
part program A series of instructions used by a CNC machine to perform the necessary sequence of operations to machine a specific workpiece. The Mazak Matrix control is capable of executing both traditional EIA G-code programming and Mazatrol conversational programming.
perpendicular Positioned at right angles, or 90°, to each other. A vertical line is perpendicular to a horizontal line.
program zero The origin of both the workpiece coordinate system and the part program for a particular workpiece. Program zero, commonly called workpiece zero, is unique to each workpiece design and is selected by a part programmer.
qualified tool Also called a referenced tool, a tool that has been properly measured and setup. A qualified tool is one whose dimensions are known to the control.
reference workpiece zero point A point on the centerline in the Z-axis from which the Z-offset is measured. The reference workpiece zero point is located 10 cm off the face of the chuck.
referenced tool Also called a qualified tool, a tool that has been properly measured and setup. A reference tool is one whose dimensions are known to the control.
teach function A feature of the Mazak control that allows you to automatically enter measured values into a particular register.
tool coordinate system A variable coordinate system with the tool reference point as its origin. The tooling coordinate system is different for each distinct tool and is defined during tool setting.
tool reference point The precise location on a tool from which the tool's dimensions are measured.
tool setter An accessory that allows the automatic measurement of tool geometry offsets. The tool setter is initiated by a proprietary code and executes offset measurements automatically.
tool setting The process of storing data related to the position of the tool nose and tool reference point of each tool in the turret.
work area The interior space within a turning center in which all machining is performed.
work offset An offset used to adjust the location of every tool loaded in the machine. On the lathe, the work offset changes the position of the turret in both the X- and Z-axes.
workpiece coordinate system A temporary coordinate system with the workpiece zero point as its origin. The workpiece coordinate system simplifies programming and is defined by a part programmer.
workpiece zero point The origin of both the workpiece coordinate system and the part program for a particular workpiece. Workpiece zero, commonly called program zero, is unique to each workpiece design and is selected by a part programmer.
zero point The point at which the three axes of a coordinate system meet. The reference zero point is also called the origin and is located at X=0, Y=0, Z=0.
Z-offset A work offset that is the difference between the reference workpiece zero point and the program zero location on the face of a part.