ZAR4 - Variable Spur Gears
The ZAR4 software designs involute spur gears of any shape.
The operating pitch curve may be selected as ellipse, sine, or sine-linear shape.
Or you can freely define the pitch curve, by input of up to 10 mathematical formulas, that are valid for a specified section (0° .. 360°).
The calculation of gears from self-defined formulas is very time consuming, a Pentium III processor or higher is recommended therefore.
Pressure angle, number of teeth, and face width are entered then. The module changes with the pitch radius (mn = d/z). Addendum and dedendum coefficients of tool can be selected from database.
ZAR4 calculates center distance and operating pitch curve of the driven gear. Transmission ratio, speed and acceleration are displayed at diagrams.
Animation allows you to discover meshing errors, when the gear rotates on the screen.
As no special calculation method is available for variable gears, ZAR4 calculates strength according to DIN 3390 by means of equivalent round gears.
