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2 machine datum – HEIDENHAIN TNC 407 (243 020) Technical Manual User Manual

Page 188

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01.98

TNC 407/TNC 415/TNC 425

2 Reference marks

4-63

MP1350

Type of reference mark approach

Entry:

0 = measuring system with distance-coded reference marks
1 = measuring system with one reference mark
2 = special sequence (linear measurement via rotary encoder)
3 = measuring system with distance-coded reference marks

MP1350.0 X

axis

MP1550.1 Y

axis

MP1350.2 Z

axis

MP1350.3 Axis

4

MP1350.4 Axis

5

Marker

Function

Set

Reset

M2136

Reference marks X axis not yet traversed

NC

NC

M2137

Reference marks Y axis not yet traversed

M2138

Reference marks Z axis not yet traversed

M2139

Reference marks axis 4 not yet traversed

M2140

Reference marks axis 5 not yet traversed

M2556

Reference end-position for X axis

PLC

PLC

M2557

Reference end-position for Y axis

M2558

Reference end-position for Z axis

M2559

Reference end-position for axis 4

M2506

Reference end-position for axis 5

Address

Function

Set

Reset

W272

Operating mode

NC

NC

1 = Manual operation
2 = Handwheel
3 = Positioning with manual entry
4 = Program run/single block
5 = Program run/full sequence
7 = Pass over reference points

2.2 Machine datum

The reference mark defines a point on the measuring system. The reference points of all axes define
the scale datum. MP960.x contains the distance from the scale datum to the machine datum. All
REF-based displays and positioning movements refer to the machine datum (see also Section
"Display and operation").