HEIDENHAIN TNC 122 User Manual - Manual (Page 25)

4 Positioning with MDI
TNC 122 25
Entering and moving to positions
For simple tasks, use the POSITIONING WITH MDI mode of operation
to machine the dimensions as you enter them.
Example: Milling a shoulder
The coordinates are entered as absolute dimensions referenced to
the workpiece datum.
Corner : X = 0 mm Y = 20 mm
Corner : X = 30 mm Y = 20 mm
Corner : X = 30 mm Y = 50 mm
Corner : X = 60 mm Y = 50 mm
Procedure:
⇒
⇒ ⇒ ⇒ ⇒ Enter the tool data.
⇒ ⇒ ⇒ ⇒ ⇒ Move the tool to a good starting position
(e.g. X = Y = – 20 mm).
⇒ ⇒ ⇒ ⇒ ⇒ Move the tool to the milling depth.
Mode of operation: POSITIONING WITH MDI
Y
X
1 2
3 4
60 30
20
50
0
0
Select the Y axis.
0
Y R 0
2
Y
Move the tool to the programmed position.
Select the X axis.
0 3
X R 0
X
Move the tool to the programmed position.
I
I
Y blinks:
Enter the nominal position for corner point : Y = + 20 mm,
select the tool radius compensation: R +
and confirm your entry.
X blinks:
Enter the nominal position for corner point : Y = + 30 mm,
select the tool radius compensation: R –
and confirm your entry.
R + / – ENT
R + / – ENT
3
1
2
4
1
2