[jimcooptcam77]

I am having some surface finish problems when cutting with simultaneous 4 axis. I noticed that when there is a lot of rotary motion in my program the controller flashes between feed and rapid on the display, but each line of code has a given feed rate, there is no G00 call.

Anyone have any ideas on this?

[KenFoulks]

Are you using inverse time?

[jimcooptcam77]

Yes, G93. But even when turning that off, it still shows the same thing.

thanks for the reply,

Jim

[KenFoulks]

Is HSM enabled?

[jimcooptcam77]

Yes

thanks,

Jim

[ToyMaker94566]

Did you tell the control what diameter you are working at so the feed can be correctly calculated? I believe the diameter call out is the next parameter below "4th axis enable"....

[jimcooptcam77]

Yes, the diameter has been set.

As a result of another error, i had to restart the control. The rapid/feed display seems to be solved by the reboot. I am still having finishing problems, but that doesn't seem to be related.

thanks for all the posts in reply!
Jim

[Wizzard of H]

What you are seeing is an efect of mixing linear and rotary motion with high speed machining option. it is not a problem. It just indicates that the rotary axes had to slow down when getting near the end of a stroke to insure machine stays accurate.

[jimcooptcam77]

That's very interesting. I'm doing some tests that show just that. The rotary is ahead of the linear axis on each move, but I'm starting to think it is a problem.

Anyone found a way to tune the rotary axis to the linear?

[Wizzard of H]

Check that parameters 786, 787, 788, and 789 are all the same value. If you have them, they are probably set to 64 but they all need to be the same.

[jimcooptcam77]

Wizard of H - cannot thank you enough....and Haas should thank you too. Seems they've shipped their version 17.03 software machines with the linear FIR's set to 64 and the Rotary FIR's set to 0. Linear and Rotary axis are tracking much better now with both set to 64.

thanks so much,

Jim