Fourier analyses

[[Ed...]]

Hi,
I need to evaluate this MAX WAVINESS!
Like I understood, this is related to cylindricity?
Can someone give me some advice in this case? Is it possible do evaluate something in Calypso?

BR

Ekrānuzņēmums 2023-06-02 113517.jpg

[[Da...]]

I haven't done this myself, but it should be pretty straightforward using the waviness evaluation. You put the values into the dialog, check "double amplitude", and you need a certain amount of points (300 waves per rotation max for the Fourier analyis means: 300 upr * 7 points per wave = 2100 points for each evaluated circle minimum, if you use a cylinder you need 2100 points minimum per section). Use the smallest probe diameter possible and slow speeds.

The shown formula "RTA curve" is what you need. I think you need to limit the values in Harmonic and I'm not sure about the Type of Evaluation, but maybe you can take it from here.

[[Ed...]]

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Thank you very much 😉
About number of points, the main thing is to have at least 2100 points per circle, it is good like in attached picture?

Only thing I don`t understand is about "Upper and Lower Limits"? What should be there? How you understand it?

What does this evaluation shows to me in overall?

Captu1re.JPG

[[Da...]]

The number of points is good.

The drawing calls for all harmonics <= 300 waves per rotation, so 0 and 300 should be your limits. That’ll give you a pass or fail for every harmonic, not only 2 as you have now.

See where the waviness goes down and then up again from around 270 upr? That’s the range where your waviness might fail.

[[Ed...]]

Great 🙂 Thank you...