Slope modification?

[[Ed...]]

Hi, my friends.

I have this kind of demand in drawing:

I`m little bit confused about what I need to put in calculation of fHbeta? Is this correct, nominal value, slope modification, will it calculate correctly high point of crowning?

And what is this FhbetaC?

Edited 5 hours ago

[[Ro...]]

Hi,

fHbetaC (also fHalphaC) is defined in ISO 1328-1:2013-09. 
Sorry, I´m not allowed to share screenshots from standards, but if you have the ISO 1328-1:2013-09 have look into page 34 B.3.3. and formula B.2
A very good picture example is included in VDI/VDE 2612 Part 1:2024-12 on page 38.

In the user manual of GEAR PRO you can search for "Nominal slope modification for profile and line".
The topic is described very clearly there ...