Fanuc D series lathe issues

[DavidSV]

We just got a new lathe with a Fanuc D series control. There seems to be some sort of delay when it transitions from a feed to a rapid, or a rapid to a feed. You can really see it in a threading cycle because it happens so frequently. It happens on all transitions though. The first part we put on the machine has a 6 start 10-32 thread. I think that because of the length it has something like 42 total passes. It took 30 seconds longer per part than our outgoing 1993 model lathe. The new lathe has rapids 4x faster than the old lathe, and more RPM, yet the delay on the transitions slowed the program down a lot. I don't have time to read through thousands of parameter pages in the yellow books, and the machine seller is investigating the delay. Does anyone here know of there is a parameter that could be set to have a delay between a feed and a rapid?

 

Thanks

[Cannon]

It might be the acceleration/ deceleration value set too high. Our lathe is the other way round, shaking the whole machine when in thread cycle.

[chris m]

The "wait for spindle speed confirmation" setting may be causing this when using CSS. If you program G97 and run the same path does the hesitation go away?

[DavidSV]

The whole program is G97.

[chris m]

OK, so much for that; sorry, no further assistance from this corner.

 

C