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Posted by Brian Francis on June 27, 2008, 6:01 pm
Please log in for more thread options On Jun 27, 9:58=A0am, upnrunn...@earthlink.net wrote:
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> > wrote:
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> > >>I have a customer with a brand new 5 axis trunnion bridge type mill.
> > >> He has MasterCam X2 and they wrote a post to match the machine. The
> > >> control is a Fanuc 18i. We have done some test parts and they look
> > >> symmetrical and accurate. =A0The problem is the machine hesitates at
> > >> every block of code. I don't know if it is a post issue or a machine
> > >> issue. Obviously an operator issue as this is my first real 5 axis
> > >> experience. I've tried changing various settings in the software
> > >> regarding edge and gap and tolerance percentages and the machine sti=
ll
> > >> hesitates at every block. The control has APCC and NANO but I get
> > >> alarms when the machine exceeds 3 axis. Any ideas how I can get the
> > >> machine to cut smooth tool paths? Thanks in advance.
>
> > >IMHO its only doing what its told...........by the prog.
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> > >what does the machine supplier say....
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> > That sounds like a Fanuc issue, something like Look ahead, or
> > pre-processing code. =A0Is there a parameter for how many lines of code
> > it can process before?
>
> > Call Fanuc directly, they may be able to help.
>
> > samurai.
>
> The obvious stuff has already been done, I have a day or so to kill
> until I can get support. I was hoping someone had some direct
> experience with a similiar situation while I'm waiting.- Hide quoted text=
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> - Show quoted text -
1. I'd suggest putting a G64 before the tool path, in the off chance
that the control is set to G61 (modal exact-stop).
2. Do the end-of-block interruptions occur if you drive the machine at
a slower, or much slower rate? If the problem goes away at lower
feeds, then you may have an issue overdriving one of your axes. It may
not be a problem with a physical axis limitation, but rather an error
in the parameter settings of the controller.
3. Are you licensed to use the G05 P10000 high speed machining feature
of the control? Put the G05P10000 just before the first feed of the
contour, and add a G05P0 at the end, and see if this corrects the
problem.
4. Are you licensed to use the G43.4 and/or G43.5 functions? I am not
aware of any isues with tool path interruptions with these function,
but the post has to control the feed at the tool tip and not at the
control point when running under G43.x. If the post is outputting G94F
feeds that control the actual linear/rotary displacements, and you are
driving under G43.4/G43.5, chances are you will have feeds that are
both too high, and vary wildly.
That's all I can think of for now.
Good luck,
Brian.
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> He has MasterCam X2 and they wrote a post to match the machine. The
> control is a Fanuc 18i. We have done some test parts and they look
> symmetrical and accurate. The problem is the machine hesitates at
> every block of code. I don't know if it is a post issue or a machine
> issue. Obviously an operator issue as this is my first real 5 axis
> experience. I've tried changing various settings in the software
> regarding edge and gap and tolerance percentages and the machine still
> hesitates at every block. The control has APCC and NANO but I get
> alarms when the machine exceeds 3 axis. Any ideas how I can get the
> machine to cut smooth tool paths? Thanks in advance.
>