You can try getting a Laser RPM measurement tool.

Here is a link that might be useful: Laser RPM Measurement

Different cycles may have different max spin speeds. Have you checked your owners manual?

Hallo Georgect and Oregpsnow,
thank you for your answer and for your help.

Oregpsnow: yes, I used the cotton program, speed must be max.
Georgect:
But I found a solution,maybe, see here below the link:

http://www.youtube.com/watch?v=blOdenW6veE&feature=youtu.be

I put this app in my Iphone, it is fantastic for my goal!

https://itunes.apple.com/us/app/washspeed/id588527777?l=it&ls=1&mt=8

what do you think?
regards

Wow washuser...that's so cool, thanks for the tip.

I see you have already posted the question in the German forum. Your Siemens won't go up to max speed if it's unbalanced.

Alex

yes I agree , machine is not spinning if unbalanced.
thanks