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    README

    Uploaded by

    Manikanta Swamy
    PyGear is an open-source Python software that generates gear geometry and calculates gear properties. It relies on industry standards to create exact gear shapes that can be exported in various 2D and 3D file formats. PyGear uses Python and requires additional modules like pythonOCC, wxPython, NumPy and SciPy. It is released under the GNU GPL v3 license.

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    README

    Uploaded by

    Manikanta Swamy
    29 views3 pages
    PyGear is an open-source Python software that generates gear geometry and calculates gear properties. It relies on industry standards to create exact gear shapes that can be exported in various 2D and 3D file formats. PyGear uses Python and requires additional modules like pythonOCC, wxPython, NumPy and SciPy. It is released under the GNU GPL v3 license.

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    README.txt

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    PyGear is an open-source Python software that generates gear geometry and calculates gear properties. It relies on industry standards to create exact gear shapes that can be exported in various 2D and 3D file formats. PyGear uses Python and requires additional modules like pythonOCC, wxPython, NumPy and SciPy. It is released under the GNU GPL v3 license.

    Copyright:

    © All Rights Reserved
    Download as TXT, PDF, TXT or read online from Scribd
    Download as txt, pdf, or txt
    29 views3 pages

    README

    Uploaded by

    Manikanta Swamy
    PyGear is an open-source Python software that generates gear geometry and calculates gear properties. It relies on industry standards to create exact gear shapes that can be exported in various 2D and 3D file formats. PyGear uses Python and requires additional modules like pythonOCC, wxPython, NumPy and SciPy. It is released under the GNU GPL v3 license.

    Copyright:

    © All Rights Reserved
    Download as TXT, PDF, TXT or read online from Scribd
    Download as txt, pdf, or txt
    of 3

    =================================================

    pyGear
    =================================================

    project home:
    https://sourceforge.net/projects/pygear/

    What is pyGear?
    --------------
    PyGear is open-source software for generating gear geometry and calculating
    gear properties. It is intended to be used as a pre-processor for Computer-
    Aided Design and Computer-Aided Engineering.
    It relies on industry standards in order to create the most
    exact shapes possible. At the same time it is easy to use, as it let's you
    generate geometries in many different ways, even with a minimum of input
    data provided. The gear-geometry can be exported as 2d-coordinates or in
    3d as STEP, IGES or VRML-file.

    PyGear relies on Python and additionally the modules pythonOCC, wxPython,


    NumPy and SciPy are required.

    pyGear structure
    ----------------
    Currently pyGear consists of the following files:

    README.txt
    setup.py
    pygear.py
    license.txt

    License information
    -------------------
    The pyGear-code is published under the terms of the GNU General Public License v3
    http://www.gnu.org/licenses/gpl-3.0.html
    See the file "license.txt" for terms & conditions for usage, and a DISCLAIMER
    OF ALL WARRANTIES.

    ChangeLog
    -------------------
    0.12: - gear-generator for cylindrical gear wheels (spur, helical, internal,
    external)
    - 2d-export (x-y-coordinates)
    - 3d-export (STEP, IGES, VRML) and display
    - basic gear pair calculations
    0.14: - tooth thickness allowance --> exact flank
    - addendum allowance
    - acceptance backlash calculation
    - tip chamfer enhancements
    - bug fixes
    - renamed classes:
    "SpurGearWheel" --> "CylindricalGearWheel"
    "SpurGearPair" --> "CylindricalGearPair"
    0.20: - gear hobbing simulation --> exact geometry (external gears only)
    - multi-step manufacturing by defnition of blank
    - new classes:
    "Tool"
    "ToothedRackTool"
    "Machine"
    "GearHobber"
    "Blank"
    0.21: - removed redundancies from code
    - modified to work with newer versions of pythonOCC, NumPy and SciPy
    - removed trochoidal root shape generation as it was not correct for
    helical gears
    --> use hobbing simulation for exact root fillet shape instead
    0.22: - novel algorithm for envelope computation in manufacturing simulation
    - manufacturing simulation enhanced: replaced linear interpolations for
    edge-points with exact algorithm (within numerical precision)
    - manufacturing simulation more precise and stable
    - bug fixes
    0.23: - improved algorithm for envelope computation in manufacturing simulation
    - manufacturing simulation more accurate and robust
    - manufacturing simulation much faster now
    - manufacturing of gears with pointed tip works now
    - some convergence problems fixed
    0.24: - applied patch to work with PythonOCC 0.16 (credits: Niels Linnemann)

    Installation
    ---------------------
    make sure you have Python (http://www.python.org) installed.

    make sure that the following packages are installed:


    1. pythonOCC, http://www.pythonocc.org
    2. wxPython, http://www.wxpython.org
    3. NumPy, http://numpy.scipy.org
    4. SciPy, http://numpy.scipy.org
    5. matplotlib, http://matplotlib.sourceforge.net (required for example problems
    only)

    then copy the file pygear.py to


    <python path>\Lib\site-packages

    The code has been tested with Python 2.7.10, http://www.python.org


    required modules (tested with version):
    1. pythonOCC (0.16), http://www.pythonocc.org
    2. wxPython (3.0.2), http://www.wxpython.org
    3. NumPy (1.9.2), http://numpy.scipy.org
    4. SciPy (0.16.0), http://numpy.scipy.org
    5. matplotlib (1.4.3), http://matplotlib.sourceforge.net (for example problems)
    it is strongly recommended to use the same versions of the modules as pyGear likely
    won't work with older versions. Later versions might work, but this has not been
    tested.

    Documentation
    ------------------
    sorry, not yet. See the comments in the source code of file pygear.py for some
    documentation.

    Examples
    ------------------
    There are some example problems:
    example_data.py
    example1.py
    example2.py
    example3.py

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