NX Upper and Lower Plane ZM Settings in a 4 Axis Wire EDM Operation

How do the Wire EDM Upper and Lower Plane ZM settings effect the posted output when generating NC code for a 4 Axis Wire EDM operation?

Solution

Changing the Upper and Lower Plane ZM levels will cause the U and V offsets in the posted output to change when posting a 4 axis cut. Notice below how the output is different when the Upper Plane ZM is changed from 1.5" to 2".

Upper Wire Guide set to 1.5":

N0010 G40 G90 G70
N0020 G92 X0.0 Y0.0 Z0.0 R1.5
N0030 M06
N0040 G00 X1.4225 Y1. U0.0 V0.0
N0050 G41 G01 X1.6225 U-.1312
N0060 Y1.35
N0070 X1.6188 Y1.3828 U-.1279 V-.0292
N0080 X1.6079 Y1.414 U-.1182 V-.0569

Upper Wire Guide set to  2.0":

N0010 G40 G90 G70
N0020 G92 X0.0 Y0.0 Z0.0 R2.
N0030 M06
N0040 G00 X1.4225 Y1. U0.0 V0.0
N0050 G41 G01 X1.6225 U-.175
N0060 Y1.35
N0070 X1.6188 Y1.3828 U-.1706 V-.0389
N0080 X1.6079 Y1.414 U-.1576 V-.0759

Adding a Wire "Tool" from the Tool Library will cause the wire and the wire guides to be displayed at the correct level when verifying the operation. This can be seen in the picture below. Contrasting this, changing the Upper and Lower Guide Offset will change the path display but will not effect the output.

Notes and References

Hardware/Software Configuration

Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: CAM
Version: V1859
Function: WIRE_EDM

Ref: 001-7467480