Hello from Iran

[Jmashid]

Hi all

Finally I made my first CNC skeleton model in Autodesk Inventor.
- The structure is composed of square hollow sections of size 100x100x6 mm
- Structure weights about 555 kg
- Dimensions: 2500x1500x500 mm (LxWxH)

I analyzed it to find its natural frequencies. I found the following data:
- 1st Mode: modal frequency: 60.69 Hz - maximum displacement: 151.2 mm (too high! I think if I use ANSYS more precise results could be found)
- 2nd Mode: modal frequency: 66.76 - maximum displacement: 151.2 mm.

I don't know any thing about acceptable ranges for frequencies and their corresponding displacements in CNC machines.

Here you can see the model and modal analysis results:



Thanks for any suggestions

Jamshid