NX version 18.104.22.168
I am trying to threadmill a 2 1/2" npt into a 1" thick plate of steel with a Sandvik Coromill 327.
MCS is set to top center of the hole feature. I created the hole feature in NX, and when I create the thread milling operation to machine it everything works fine without cutter compensation enabled. Here is the list output for the operation:
RAPID GOTO/0.0000,0.0000,-30.0000 PAINT/COLOR,42 FEDRAT/MMPM,500.0000 GOTO/-23.2004,-7.7291,-30.0000 PAINT/COLOR,31 CIRCLE/0.0089,-0.0137,-29.6073,0.0000000,0.0000000,-1.0000000,24.4581,0.0600,0.5000,17.4000,0.0000 GOTO/-11.1204,-21.7929,-29.6073 CIRCLE/0.0163,0.0008,-29.2143,0.0000000,0.0000000,-1.0000000,24.4743,0.0600,0.5000,17.4000,0.0000 GOTO/7.3666,-23.3437,-29.2143
I want to be able to control the thread feature at the machine so I enabled Cutcom Location All Passes in non cutting moves and the operation creates an undesirable toolpath. Here is the list output:
RAPID GOTO/0.3161,-0.9487,-30.0000 CUTCOM/LEFT,1 PAINT/COLOR,42 FEDRAT/MMPM,500.0000 GOTO/-2.7498,8.2540,-30.0000 GOTO/-25.9501,0.5249,-30.0000 GOTO/-34.2041,-2.2248,-30.0000 GOTO/-31.4561,-10.4735,-30.0000 PAINT/COLOR,31 CIRCLE/0.0089,-0.0137,-2.6073,0.0000000,0.0000000,-1.0000000,33.1581,0.0600,0.5000,17.4000,0.0000 GOTO/-15.0792,-29.5400,-2.6073 CIRCLE/0.0163,0.0008,-2.2143,0.0000000,0.0000000,-1.0000000,33.1743,0.0600,0.5000,17.4000,0.0000 GOTO/9.9794,-31.6421,-2.2143
As you can see the first circular move takes the tool from Z-30. up to Z-2.6073 but then starts threadmilling the correct pitch all the way to Z+30?!
I have engage moves set to helix, I specified cutcom to engage 1mm at 90 degrees, and enabled output contact/tracking data. I have the cutting parameters set to extend 3mm from top and bottom. I'm not sure if this is a bug or if I am doing something wrong but it seems to translate z upward the thickness of the part on that first circular move. Any Ideas?
Solved! Go to Solution.
I see you are using 22.214.171.124. To check if you're problem is a new one or already fixed on a recent version I would like to have a (similar) part file. Would you be able to send me yours?
Thanks in advance,
Here is the part file.
Edit: I was unable to attach it here. I sent a reply to the email adress that notified me of your post and attached the file NPT.prt.
Make sure to attach the file through the web forum, not the e-mail.
Production: NX10.0.3, VERICUT 8.0, FBM, MRL 3.1.4 | TcUA 10.1 MP7 Patch 0 (10.1.7.0) | TcVis 10.1
Development: VB.NET, Tcl/Tk Testing: NX11.0 EAP, NX12.0 EAP
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An alternative is to contact GTAC and submit the part file there. GTAC will then be able to check the problem (which release, fixed y/n) and create a PR if needed.
When you submit a part file make sure sharing is allowed!
If in doubt, GTAC is the best route to follow.