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Selecting the position display mode – HEIDENHAIN TNC 122 User Manual User Manual

Page 17

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Working with the TNC 122 – First Steps

TNC 122

17

Selecting the position display mode

The TNC can show different types of position values for a tool
position.

Fig 2.1 shows the following positions

Starting position of the tool

Target position of the tool

Workpiece datum

Scale reference point

The TNC position display can be set to show the following types of
information:

Actual position
The position at which the tool is presently located as refer-
enced to the workpiece datum.

Servo lag
The difference between nominal and actual positions

Actual position referenced to the scale reference point

To change position display modes:

⇒ Set another position display mode in the user parameter

MP 7322 (see Chapter 8).

4

2

3

1

Z

A

W

M

Fig 2.1:

Tool and workpiece positions

W

M

Z

2

2

4

A

1

3