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Rotary Pocket overloading CPU Usage

Message 1 of 8
196 Views, 7 Replies

Rotary Pocket overloading CPU Usage



We need to machine this kind of helical gears using simultaneous 4 axis strategies.

When I generate the Rotary Pocket strategy it loads the CPU to 100% and it takes some time to calculate.

Since we´re going to use these type of strategies quite a lot, I have a question:

If we upgrade the CPU, can we improve the calculation time? If yes, what processor do you guys use/recommend?


Here´s the data:

Core i5-12400F 2500 Mhz 6 Cores


GeForce GTX 1660 SUPER 6GB

Calculation time: 2min 29sec (Rotary Pocket only)

Message 2 of 8

My home PC is running an AMD ryzen 5 3600 3.6GHz 6 core and 16 GB ram

Generation took 195.3 seconds(3mins 15 sec) which isn't too bad.



My processor was running at 4Ghz while generating on all 6 cores so it appears to be multi-core compatible toolpath.

also used 11GB ram.


My work PC is much more powerful Intel i7 9700k and 32GB ram so it would be interesting to see how much faster that it would generate(I can't check until monday)


I also wouldn't characterise it as "Overloading" the CPU its just maxing it out which happens on most 3D type operations and especially multiaxis ones with collision avoidance turned on


For Cam Work, its seems that Clock speed is more critical than number of cores but in saying that this toolpath was utilising all the cores so maybe more is better in this case in which case going to a processor with more cores could be beneficial.



Message 3 of 8

On my PC ...


136 Sec


Intel(R) Core(TM) i9-7920X CPU @ 2.90GHz (24 CPUs), ~2.9GHz



Message 4 of 8


So as a matter of comparison, this tool path does seem to benefit highly from number of cores and clock speed of processor. This is from my personal home PC:


On an old clunker, I managed 5 minutes 38.8 seconds.

All 8 cores maxed out at 100% (4 physical, 4 logical cores) running up to 4.33GHz turbo mode and CPU fan sounding like a jet ramping up to 100% thrust getting ready for take off.

Memory usage jumped from about 9 to 12 meg out of 16 meg of physical memory.

This on an Intel Core i7-4790K CPU @ 4.00GHz which is roughly 10 years old.

If I get a chance early in the week, I will try at work. My PC was just replaced. It is a Ryzen something or another with 32 gigs ram.

Message 5 of 8

So on my Intel i7 11700 8 core it was only 5 seconds faster at 190.5 seconds

But that was at clock speed 2.73GHz while generating so quite a lot less than the ryzen at 4GHz

In theory the i7 11700 can boost to 4.9GHz so I'm not sure why it was going so slowly. need to do some investigating there.


Seems like more Clock speed+cores is definitely beneficial

Message 6 of 8

Thank you guys. 

It would also be interesting to hear from someone at Autodesk. Because if I'm gonna ask our IT department for a better computer, I need to know exactly what to aim for. 

Message 7 of 8

I was looking at the benchmarking of another file in Fusion and the absolute fastest generation time was on an AMD Ryzen 9 7950X 32GB ram


second was a i9 13900K with 64 GB ram.


The Ryzen 9 7950x was 40% faster than a Ryzen 9 5950X

Message 8 of 8



So at work, this is the system:


Screenshot 2024-01-17 074414.png


Results for generation:

Screenshot 2024-01-17 074226.png


Take it for what it is worth.


ALL 16 "processors" went to 100% usage. Clock speed went from 3.8 to 4.07 during regen. Memory usage did not look like it went up much, maybe from 9 to 11 gigs.


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