HEIDENHAIN TNC 122 Technical Manual - Manual (Page 21)

20
TNC 122 9 Machine Integration 4/97
Sequence for “Automatic reference mark traverse” (pressing the machine START key).
MP1350.x = 0
Press the external START key
Trig dog
"Reference end position"
closed?
Machine moves
in direction from
MP1320.x
Machine moves in inverted
traverse direction from
MP1320.x
Two successive reference marks traversed
Is the machine
outside the software
limit switch range?
Machine moves to
software limit switch
Machine stops
No Yes
Yes
No
Yes
No
Trip dog
"Reference end position" is
closed before two successive
reference marks are
traversed