HEIDENHAIN TNC 306 Technical Manual - Manual (Page 214)

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TNC 406/TNC 306 9 Short circuit/probing 2/97
9.2 Successive probing
The probing procedure is so that the electrode automatically makes contact several times in
succession. MP6100 defines the number of times contact is to be made. The measured value
resulting from the first contact is not saved; it serves merely to push aside the small layer of dirt
from the surface of the electrode. The subsequent values are saved: their mean value is calculated
and used as the measuring result. If MP6100 = 0 or 1, the electrode makes contact twice but only
the second measured value is saved.
MP6110 defines the maximum permitted difference of probe values during successive probing. If
this value is exceeded the error message “Probing value incorrect“ appears.
MP6100 Number of contacts in probing cycle
Input range: 0 to 5
MP6110 Maximum difference between probe values
Input range: 0 to 2 mm
9.3 Manual probing
The menu item TOUCH PROBE MANUAL is for probing in one axis (for example the Z axis),
whereby the other axes (for example X and Y) can be moved with the handwheel. The probing
process does not end upon contact; the electrode merely backs off by the value in MP6140 and then
probes again. In this way the user can find cavities, for example, in the workpiece. Probing continues
until marker M2617 is set by the PLC.
If the input value of MP6140 is 0, the electrode is returned to the starting point.
The probing path in the probing direction can be limited by entering a value before beginning.
Positioning stops when the entered limit is reached. If no value is entered, the value from MP6130
is used.
MP6140 Retraction distance in TOUCH PROBE MANUAL
Input range: 0 to 30 mm
MP6130 Maximum measuring range in TOUCH PROBE MANUAL
Input range: 0 to 30 000 mm
Set Reset
M2617 Probing stop in TOUCH PROBE MANUAL PLC PLC