(C) Copyright 1988-2011 by HEXAGON Software, Berlin
Bases for Calculation
The ZAR1 gear calculation program calculates the geometry and strength of externally and internally toothed straight spur and helical gears with involute toothing as well as rack-pinion gears in conformance
with ISO Standard 6336 and DIN Standards 3960, 3961, 3967 and 3990. The program contains appropriate interfaces for linking it to CAD systems and databases.
Geometry Calculation
Once the user has entered the pressure angle, helix angle, normal module, the numbers of teeth, facewidth and addendum modification coefficients or the center distance, the program
calculates all the important geometrical data, tool dimensions and contact ratio factors. On entering the gear quality and tolerance zone, the program also calculates the gear data,
tooth thicknesses, backlash, chordal dimension over two teeth, diametral dimension M over balls and over pins, and all permissible errors in conformance with DIN 3961 and DIN 3962.
Pinion/rack gears can be calculated by setting number of teeth for gear wheel 2 higher than 1000.
Strength Calculation
The load-bearing capacity with respect to tooth root fatigue fracture and pitting can be calculated in conformance with either DIN 3990 / ISO 6336 Parts 1 to 3 or DIN 3990 / ISO 6336 Part 41 (Vehicle
transmission).
Special Profiles
To enable users to optimize gear trains with extra-depth gearing, the program allows the tool dimensions of normal and protuberance profiles to be defined freely, with and without
tip edge breakage.
Output
All input data and results can be output clearly on the screen or on a printer.
Simulation
The tooth shape can be displayed graphically by means of simulation using the gear-cutting tool.
In the case of internal gear and planetary gear trains, the internal gear can be shown rotating within the ring gear.
Animation
You can execute an animation of the gear tooth contact.
CAD Interface
DXF and IGES interfaces allow ZAR1 to be linked to CAD and DTP systems. ZAR1 generates drawings of the front and side elevation of the gears calculated, plus tables containing the
gear data and dimensions.
The tooth shape with involutes and envelopes can be calculated precisely and plotted out in CAD. A single tooth, the tooth space, the complete gear, gear-generating tool,
planetary gear train and a sectional view of the tooth action can be displayed on the screen or output as a CAD drawing.
Database Interface
The materials used for making gears can be selected from a database and transferred to ZAR1. A database suited to this purpose is one that uses dBase format or the integrated
database in the extended version ZAR1+.
Load Spectrum
The extended version ZAR1+ allows you to define a load collective, and calculate the application factors,
with a life expectancy diagram.
User Interface
ZAR1 uses user prompting with pull-down menus and pop-up windows, that allow even the less experienced PC user to find his way around the program quickly.
ZAR1 provides users with a relevant help text wherever they are in the program. When the demo mode is selected, ZAR1 runs through a demo program in which an example calculation is
performed. ZAR1 contains more than 50 auxiliary pictures with geometrical signs and formulas used by the program.
System Requirements
ZAR1 is a 32 bit application for Windows 95, 98, NT, 2000, XP, Vista, 7.
If the CAD facility is to be used, the system used must be equipped with a DXF or IGES interface.
Scope of Delivery
The ZAR1/ZAR1+ package consists of
CD-ROM containing ZAR1 program, installation routines, files with application examples, help images
manual with installation instructions, program description and examples of application, forms for input data
license agreement for an indefinite period of time, with update service
Software Maintenance
ZAR1 is constantly being improved and updated. Registered users will be offered new versions at a reasonable update price.
Guarantee
HEXAGON guarantees for a period of 12 months that the software will fulfil the functions described.
