On Machine Probing in NX question

[MtnJunkie360]

Using NX 10.0.2.6 and a Makino A51NX Hroizontal with renishaw Probe.

Using NX OOTB Probing functions, and the OOTB Probe ugti0402_001

Ive gotten it to position B axis using "Rotary point vector move" subop
Then i protected mode rapid to near the point using "linear move to point" subop
Then probe to a point on a flat surface using "probe to point" subop.

Graphically it looks like it wants to plunge the center of the ball to the point in Z.

Also when posting the Z value for the probing line looks like it also wants to goto the center of the ball.
I expected the code Z value to be the actual physical Z location of the surface.

Made up example being if my Work coordinate was based on CL of B, and i probe an 8" tombstone in Z the code would read
G65 P9511 Z4.0

But its posting the Z4.0 to be 3.9 something, half a ball too deep....

should the zero point of my probe not be CL of sphere as came OOTB?

 

[markrief]

Since NX9 the output of the probing tool paths is center of the stylus (NX9 Manufacturing product notes):
Probing teach mode
The mom event output for probing teach mode operations has changed to align the output with other operation types. The following coordinate outputs are available within probing sub operations:
[ul]
[li]mom_probe_center_pos contains the coordinates of the center of the probe tip.[/li]
[li]mom_pos now contains the coordinates of the active tracking point, which coincides with the center of the probe tip. mom_pos and mom_probe_center_pos contain the same output.[/li]
[li]mom_probe_contact_pos contains the coordinates of the contact point between the probe tip and the part or tool.[/li]
[/ul]To support existing post processors, you can change the output with the following environment variable setting:
UGII_CAM_PROBING_LOCATION_OUTPUT = 1
This sets the mom_pos values for the probing sub operations to the mom_probe_contacts_pos values.

We cannot reproduce your scenario, the ‘probe to point’ subop is not going into the surfaces, but compensates for the ball diameter. The post processor outputting the Renishaw subroutines is updated to output the contact point for the actual probing motion as this is as expected by the Renishaw cycles.

We need more data to understand what you are seeing. Please log a call with GTAC.


Mark Rief
NX CAM Customer Success
Siemens PLM Software