CNC Controls: Mazak

# Mazak Mill: Entering Offsets 280

This class provides an overview of offsets and the step-by-step instructions needed for measuring, entering, and adjusting offsets using the Mazak Mazatrol Matrix Mill control.

• Difficulty Intermediate

• Format Online

• Number of Lessons 16

• Language English

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Course Outline
• Objectives
• Mill Offsets
• Types of Offsets
• Work Offsets
• Viewing Work Offsets
• Viewing Geometry Offsets
• Tool Data Display
• Geometry Offsets in a Part Program
• Measuring Geometry Offsets Off the Machine
• Setting Tool Geometry Offsets Manually
• Measuring and Setting Tool Length Offsets on the Machine
• Measuring and Setting Geometry Offsets with a Tool-Setter
• Incremental Adjustments and Wear Offsets
• Determining Wear Offsets
• Summary
Objectives
• Describe offsets.
• Identify the types of offsets.
• Describe work offsets.
• Describe how to view work offsets.
• Describe how to view geometry offsets.
• Identify fields in the tool data display.
• Identify the function of particular EIA-ISO program codes.
• Describe how to measure geometry offsets off the machine.
• List the steps for manually setting tool geometry offsets.
• List the steps for measuring and setting tool length offsets on the machine.
• Describe measuring and setting geometry offsets with a tool-setter.
• Define wear offsets.
• Describe how to determine wear offsets.
• List the steps for adjusting wear offsets.
Glossary
Vocabulary Term
Definition

1-2-3 block

A precise metal block with dimensions measuring one, two, and three inches respectively. An operator can use a 1-2-3 block to touch off tools during setup.

actual diameter

The real diameter of a tool as indicated during tool measurement. The actual diameter of a tool often differs from its nominal diameter.

axis selector switch

A switch on the machine controls section of the Matrix control that determines which axis can be controlled by the manual pulse generator.

background edit mode

A mode of the control that allows an operator to edit a program in memory while another program is being run.

basic coordinates system unit

The second of four Mazatrol programming units. The basic coordinates unit defines workpiece or program zero.

centerline

An imaginary line that runs through the center of a cylindrical tool.

The rounded tip on the cutting edge of an insert. The greater the corner radius, the greater the degree of roundness at the tip.

cursor key

The area of the control keypad that allows an operator to move through various screens and fields in the control, edit and search for CNC programs, and move the cursor up, down, left, and right through the program or screen options.

cutter compensation

An tool diameter offset used on the mill that accounts for variations in tool diameter. Cutter compensation is necessary only for tools that travel in the X- or Y-axis.

D word

A CNC program code that activates a particular tool diameter offset.

display select key

A key on the lower left of the Matrix display that toggles between available displays and their particular menu keys. The display select key is sometimes called the chapter left key.

EIA-ISO

Electronics Industry Association-International Organization for Standardization. Two separate organizations that recommend standards for the transmission of data between devices.

external cut

Cutting that takes place on the exterior surface of a part feature, such as an edge or boss. Oversized external cuts indicate a cutter that has not removed enough material.

G41

A G code used with cutter compensation to shift the tool left of the direction of tool travel.

G42

A G code used with cutter compensation to shift the tool right of the direction of tool travel.

G43

A standard G code that indicates the calling of a particular tool length offset during program execution. G43 is usually accompanied by an H word.

gage line

The imaginary line marking the portion of the toolholder that matches the bottom edge of the machine spindle. The distance from the tip of the tool to the gage line determines a tool's specific tool length offset.

H word

A CNC program code that activates a particular tool length offset.

input key

A key located near the numeric keypad that allows you to enter data.

internal cut

Cutting that takes place on the interior surface of a part feature, such as a hole or a slot. Oversized internal cuts indicate a cutter that has removed too much material.

job sheet

A document that includes all manufacturing specifications for a lot, or batch, of parts.

length teach

A method of automatically measuring and registering tool length.

lot

A group of similar parts created during the use of a particular tooling setup.

machine zero

The origin of the machine coordinates system located above the far upper righthand corner of the mill table. The unchangeable machine zero point is also known as the home position.

manual pulse generator feed key

One of four keys located on the control navigation section of the Matrix control. Each key sets the value of each click of the manual pulse generator.

nominal diameter

The stated diameter of a tool as intended during the tool's manufacture. Often, a tool's actual diameter differs from its nominal diameter.

offset

A numerical value stored in the CNC control that repositions machine components. Offsets are used to adjust for differences in tool geometry, part size, tool wear, etc.

page key

The double up and down arrow keys located on the MDI keypad that allow an operator to move through various screens and fields one page at a time.

pocket number

A number that indicates the particular tool location in the automatic tool changer (ATC).

A menu key that allows you to edit program information.

A menu key that allows you to access program information.

program zero

The origin of both the workpiece coordinates 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.

The distance from the center to the edge of a circle. If you multiply the radius of a circle by two, the result is the diameter.

run out

Variations in tool diameter in particular spots along the circumference of a tool. To account for run out, tool diameter is often measured with a tool setter while the tool is rotating in reverse.

tab key

A key on the alpha-numerical keypad that is used to jump the cursor from one section to the next.

teach

To automatically enter measured values into a particular register.

tolerance

An unwanted but acceptable deviation from a given dimension. Tolerances indicate the allowable difference between a physical feature and its intended design.

tool data display

A display that allows you to manage all aspects of Mazak mill tooling. The tool data page is accessed by pressing the tool data menu key from the main display screen.

A menu key that allows you to access the tool data display from the main menu.

tool diameter offset

An offset used on the machining center that accounts for variations in tool diameter. A tool diameter offset, often called cutter compensation, is only necessary for tools that continuously cut along a horizontal plane.

tool geometry offset

Any offset that adjusts machine components to compensate for the unique shape of a particular cutting tool. On the mill, the geometry offsets are tool length and diameter offsets.

tool length offset

An offset used on the mill that accounts for variations in tool length along the Z-axis. Each tool requires its own tool length offset, which is measured from the tip of the tool to the gage line.

A menu key that allows you to access EIA-ISO tool offset information from the tool data display.

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.

wear offset

An offset that allows for the slight adjustment of the tool location. Wear offsets account for part deflection, tool wear, etc.

work offset

An offset used to adjust the location of every tool loaded in the machine. On the mill, the work offset changes the position of the spindle in both the X- and Y-axes, and often the Z-axis as well.

workpiece coordinates

WPC. A set of values used to define workpiece zero. These basic coordinates are specified after the common unit in Mazatrol programming.

workpiece zero

The origin of both the workpiece coordinates 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.

WPC

Workpiece coordinates. A set of values used to define workpiece zero. These basic coordinates are specified after the common unit in Mazatrol programming.

x10

A pulse handle feed key that sets the speed at 0.001 mm or 0.0001 in. per click of the pulse handle. For 4th and 5th axis machines, this sets each click to 0.001° rotation.

x100

A pulse handle feed key that sets the speed at 0.01 mm or 0.001 in. per click of the pulse handle. For 4th and 5th axis machines, this sets each click to 0.01° rotation.

x1000

A pulse handle feed key that sets the speed at 0.1 mm or 0.01 in. per click of the pulse handle.