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PostBuilder: 4-Axis Post Processor Produces Incorrect Y and Z axis coordinates

Experimenter
Experimenter

Hello-

Any 4-Axis post processor I try (mm/in, Sinumerik/Fanuc, OOTB/made by PostBuilder) outputs Y and Z coordinates that are wrong - so wrong the coordinates are beyond the axis limits set in PB. 3-Axis output looks fine, albeit, minus the A-Axis data. I've included below snippets from 3-Axis, 4-Axis and tool cut list output in the hopes someone can give me an idea what I have broken.

 

Can anybody reproduce the problem on their computer?

 

Your help is greatly appreciated. Thank you!

 

K.D.

 

Windows 7 x64

NX 11

 

3-Axis

 

%
O0001
N1 G40 G17 G90 G49 G21
N2 (CUT_FLUTE2)
N3 G91 G28 Z0.0
N4 G91 G28 X0.0 Y0.0
N5 G90 G53 G00
:6 T40 M06
N7 G97 G90 G54
N8 G43 H40 S10400 M03 M08
N9 G90 X32.89 Y-23.724 Z-1.082
N10 G01 Y-22.724 Z-1.107 F620.
N11 X32.733 Y-22.3 Z-1.109
N12 X32.721 Y-22.274
N13 Y-23.273 Z-1.084
N14 G00 Y-23.724 Z-1.073

 

4-Axis

 

 

%
O0001
N1 G40 G17 G21 G94 G90

(CUT_FLUTE2 , TOOL : 40._0.73_5.75_BURR_OL_37.90)

N2 G0 G53 Z580.
N3 T40 M6
N4 G54
N5 G17 G0 G90 X32.89 Y-194.993 A88.6 S10400 M3
N6 G43 Z540.418 H40
N7 G1 Z539.418 F620.
N8 X32.733 Y-194.985 Z538.993
N9 X32.721 Y-194.984 Z538.967

 

Tool Cut List

 

TOOL PATH/CUT_FLUTE2,TOOL,40._0.73_5.75_BURR_OL_37.90
TLDATA/MILL,0.7300,0.0000,6.8700,0.0000,0.0000
MSYS/16.8910,-1.0373,-24.2781,0.0000000,1.0000000,0.0000000,0.0000000,0.0000000,1.0000000
$$ centerline data
PAINT/PATH
PAINT/SPEED,10
LOAD/TOOL,40,ADJUST,40
PAINT/COLOR,186
RAPID
GOTO/32.8897,-23.7238,-1.0821,0.0000000,-0.9997011,0.0244466
PAINT/COLOR,42
FEDRAT/MMPM,620.0000
GOTO/32.8897,-22.7241,-1.1066
PAINT/COLOR,31
GOTO/32.7331,-22.2998,-1.1087
GOTO/32.7212,-22.2737,-1.1088
PAINT/COLOR,37
GOTO/32.7212,-23.2734,-1.0843
PAINT/COLOR,211
RAPID
GOTO/32.7212,-23.7236,-1.0733

 

4 REPLIES

Re: PostBuilder: 4-Axis Post Processor Produces Incorrect Y and Z axis coordinates

Phenom
Phenom

Without a part file or the post its a little hard.

Is this a 4th axis Table or Head?

 

Possible problems.

 

Values entered in the "Machine Zero To 4th Axis Center" these should usually be left a 0

Value in "Pivot Distance" should usually be left a 0

 

For rotary tables MCS should usually be aligned with the rotary axis of the part.

ie, if the 4th axis is "A" (Rotate about YZ) then the X axis of the MCS needs to be aligned with the rotary axis of the machine setup.

Re: PostBuilder: 4-Axis Post Processor Produces Incorrect Y and Z axis coordinates

Experimenter
Experimenter

For simplicity, I used the Fanuc based 3 and 4 Axis posts included with NX to provide the snippets. Sorry, I should have said - I'm using a 4-Axis with rotary table aligned +XM with 0's for the values you have suggested. All coordinate system are aligned properly as well.

 

You have me thinking there's something wrong with the part file so when I get to work tomorrow, I'll rebuild a new file from scratch with a single operation to see if the problem persists. If all goes well, I'll add ops one at a time and post to see what breaks the part file.

 

Thanks for the idea!

Re: PostBuilder: 4-Axis Post Processor Produces Incorrect Y and Z axis coordinates

Phenom
Phenom

You could also open the part file in the samples to see if that has the same problem. I have not had access to NX11 yet - I am curious to see if something is not working right.

NX10.03
Windows 7 Pro

Re: PostBuilder: 4-Axis Post Processor Produces Incorrect Y and Z axis coordinates


Study wrote:

You could also open the part file in the samples to see if that has the same problem. I have not had access to NX11 yet - I am curious to see if something is not working right.


In case you don't know where to find them, go to Menu > Help > Manufacturing Tutorials > Open a Sample Part, and scroll down to NC Simulation Samples.

Mark Rief
Retired Siemens

Learn online





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