At this section, common general data and settings for the whole gear system can be defined, such as:
•Normal module
•Normal pressure angle
•Helix angle
•Basic rack addendum: haP is the coefficient to define the addendum of the standard basic rack tooth profile defined as addendum = haP * mn. This value is normally equal to 1, thus being the addendum = mn.
•Required clearance: The required clearance is a restriction that sets a minimum permissible distance between the tooth tips of unconnected gears to prevent them from colliding with each other.
