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Circular interpolation slowdown on Fanuc 16i controller
Thank you, makes sense about the full movement. I've tried calling for a G08 P1, which is what my manual says, but the result is the same. How do I know if it's properly implementing look-ahead, and should that have smoothed out the feedrate variance?- zelostos
- Post #9
- Forum: CNC Machining
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Z
Circular interpolation slowdown on Fanuc 16i controller
You're saying it can be turned on? Is it through a parameter? I'd be willing to try it. I thought I had posted a long reply, but I must have misclicked. In short, it only seems to slowdown on the specific block with the G03 code. My plunging helix also uses G03, but is consistent there. Bolded...- zelostos
- Post #7
- Forum: CNC Machining
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Z
Circular interpolation slowdown on Fanuc 16i controller
Not drip feeding. We've run into too many issues in the past so we usually try to run directly from the machine memory. Oof. Wish I hadn't read that second thread. It does seem like the same issue I'm having though, 16i controller circa 1997-1999 Robodrill. I gather you weren't able to find a...- zelostos
- Post #6
- Forum: CNC Machining
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Z
Circular interpolation slowdown on Fanuc 16i controller
It does. The tool path is correct and looks the same as if ran on the newer machines, it's just not smooth and consistent feed like on the other machines. For example if it mills circular passes at 50 ipm, when the end mill approaches 9 or 3 oclock points of the circle it may slow down to 20...- zelostos
- Post #3
- Forum: CNC Machining
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Circular interpolation slowdown on Fanuc 16i controller
Hello! First post on the forum. We have multiple Fanuc Robodrills, however the one in question is rather old, a T14iA with a 16i controller. When running a program with G03 the feedrate varies wildly during the arcs, rather than staying at a consistent speed. On the newer Fanucs with 31...- zelostos
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- Replies: 8
- Forum: CNC Machining