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HEIDENHAIN TNC 407 (243 020) Technical Manual User Manual

Page 182

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01.98

TNC 407/TNC 415/TNC 425

2 Reference marks

4-57

Sequence "Automatic passing over reference marks" (press the external START key).
MP1350.x = 0

Press external START key

Trip dog

"Reference end position"

closed?

Traverse direction from

MP1320.x

Invert traverse direction

from MP1320.x

Pass over two consecutive

reference marks

Machine moves to

software limit switch range

Machine stops

No

Yes

Yes

No

Is the machine

outside the software

limit switch range?

If during automatic pass-over the trip dog is not closed until it is in the "Reference end-position"
range, the contouring control will ignore the signal. It is therefore necessary that there be at least
two reference marks in the range of the "Reference end-position".