topic Re: Determining the speed or RPM of a rotating shaft in Inventor Forum

Determining the speed or RPM of a rotating shaft

m.chiedozie16 — Sun, 31 Oct 2021 17:38:11 GMT

Hi, I wanted to know if it's possible to determine the speed or RPM of a rotating shaft.

For example: I have a series of gears assembled and I simulate it. Can inventor give the speed or RPM of the output shaft?

If yes, can you please explain.

Re: Determining the speed or RPM of a rotating shaft

TheCADWhisperer — Sun, 31 Oct 2021 18:30:58 GMT

Yes.

Environments>Dynamic Simulation

Revolution Joint click on the Output Grapher.

Attach your assembly here.

Re: Determining the speed or RPM of a rotating shaft

3D4Play — Mon, 01 Nov 2021 06:19:15 GMT

I have to take a different approach here. As mentioned, Inventor can do this. However, if you do not know how to calculate this, then you should absolutely not rely on Inventor to do the work. In this case the output is directly related to the input. So, if you make a mistake in your gearing entries (for simulation), you will have NFG output, but - more important - you won't know that you have bad output. Please don't take offense (none intended), it's just advice that seems worthwhile given the way you framed the question. If you know your gear ratios, then you can EASILY calculate the output RPM without having to rely on Inventor. But, you can indeed use Inventor to verify the output that you have calculated.

Re: Determining the speed or RPM of a rotating shaft

TheCADWhisperer — Mon, 01 Nov 2021 10:42:30 GMT

Inventor uses the actual geometry.

Re: Determining the speed or RPM of a rotating shaft

m.chiedozie16 — Mon, 01 Nov 2021 19:18:05 GMT

No harm done. Thanks for the advice.

Re: Determining the speed or RPM of a rotating shaft

m.chiedozie16 — Mon, 01 Nov 2021 19:24:10 GMT

Thank you, this was really helpful. The project is still a work in progress, so I don't have a finished assembly to attach. I just wanted to know how to go about it beforehand.