HEIDENHAIN TNC 335 Technical Manual - Manual (Page 139)

4-42
TNC 360 2 Reference Marks 8/95
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."