HEIDENHAIN NC 124 - Manual (Page 41)

4 Positioning with MDI
TNC 124 41
Entering and moving to positions
For simple machining operations, you can program the coordinates
directly in the POSITIONING WITH MDI mode of operation.
Example: Milling a shoulder
The coordinates are entered as absolute dimensions; the datum is
the workpiece zero.
Corner
1 : X = 0 mm Y = 20 mm
Corner 2 : X = 30 mm Y = 20 mm
Corner 3 : X = 30 mm Y = 50 mm
Corner 4 : X = 60 mm Y = 50 mm
Preparation:
➤ Select the desired datum point
(see “Selecting datum points”).
➤ Enter the tool data.
➤ Pre-position the tool to an appropriate location
(such as X = Y = – 20 mm).
➤ Move the tool to milling depth.
Operating mode: POSITIONING WITH MDI
Y
X
1 2
3 4
60 30
20
50
0
0
NC
0 3
N o m i n a l p o s i t i o n v a l u e ?
Enter the nominal position value for corner point 2 : X = + 30 mm
and
select tool radius compensation: R –.
NC
0
N o m i n a l p o s i t i o n v a l u e ?
Enter the nominal position value for corner point 1 : Y = + 20 mm
and
select tool radius compensation: R +.
2
Move the tool to the programmed position.
Move the tool to the programmed position.
Select the X axis.
Select the Y axis.