126 lines
5.5 KiB
HTML
126 lines
5.5 KiB
HTML
<html><head><title>Macro crank simul</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><link type='text/css' href='wiki.css' rel='stylesheet'></head><body><h1>Macro crank simul</h1></div>
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<div id="mw-content-text" lang="en" dir="ltr" class="mw-content-ltr"><div class="mw-parser-output"><table class="fcinfobox wikitable ct" width="100%" style="float: right; width: 230px; margin-left: 10px;">
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<tr>
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<td class="ctTitle">
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<h3><span class="mw-headline" id="Crank_Simul"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Text-x-python.png" class="image"><img alt="Text-x-python.png" src="32px-Text-x-python.png" width="32" height="32" srcset="/wiki/images/2/2c/Text-x-python.png 1.5x" /></a> Crank Simul</span></h3>
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</td></tr>
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<tr>
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<th class="ctOdd">Description
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</th></tr>
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<tr>
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<td class="ctEven left macro-description">Crank simulation.
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</td></tr>
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<tr>
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<th class="ctOdd">Author
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</th></tr>
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<td class="ctEven macro-author"><a href="https://www.freecadweb.org/wiki/index.php?title=User:Kwahoo&action=edit&redlink=1" class="new" title="User:Kwahoo (page does not exist)">kwahoo</a>
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</td></tr>
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<th class="ctOdd">Links
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<td class="ctEven"><a href="Macros_recipes.html" title="Macros recipes">Macros recipes</a><br /><a href="How_to_install_macros.html" title="How to install macros">How to install macros</a><br /><a href="Customize_Toolbars.html" title="Customize Toolbars">How to customize toolbars</a>
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</td></tr>
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<tr>
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<th class="ctOdd">Version
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<td class="ctEven macro-version">1.0
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</td></tr>
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<tr>
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<th class="ctOdd">Date last modification
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<td class="ctEven macro-date">2014-06-13
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<th class="ctOdd">
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</th></tr>
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<td class="ctToc"><br /><div id="toc" class="toc"><div class="toctitle"><h2>Contents</h2></div>
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<ul>
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<li class="toclevel-1"><a href="#Crank_Simul"><span class="tocnumber">1</span> <span class="toctext">Crank Simul</span></a></li>
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<li class="toclevel-1 tocsection-1"><a href="#Use"><span class="tocnumber">2</span> <span class="toctext">Use</span></a></li>
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<li class="toclevel-1 tocsection-2"><a href="#The_File"><span class="tocnumber">3</span> <span class="toctext">The File</span></a></li>
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<li class="toclevel-1 tocsection-3"><a href="#Script"><span class="tocnumber">4</span> <span class="toctext">Script</span></a></li>
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<li class="toclevel-1 tocsection-4"><a href="#Links"><span class="tocnumber">5</span> <span class="toctext">Links</span></a></li>
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</ul>
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</div>
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</td></tr>
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</table>
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<p><br />
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</p><p>My simple animation uses sketch and sketcher solver to determine piston position and conrod position/rotation.
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</p><p><br />
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</p>
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<div class="floatleft"><a href="https://www.freecadweb.org/wiki/index.php?title=File:Crank_00.gif" class="image"><img alt="Crank 00.gif" src="Crank_00.gif" width="462" height="394" /></a></div><div style="clear:both"></div>
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<p><br />
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</p>
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<h3><span class="mw-headline" id="Use">Use</span></h3>
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<p>To test the animation:
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</p><p>Download the files and copy the code in the Python console FreeCAD.
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</p><p>1. Open the attached file
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</p><p>To stop animation type :
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</p>
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<pre>animation.stop() </pre>
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<h3><span class="mw-headline" id="The_File">The File</span></h3>
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<p><a rel="nofollow" class="external text" href="http://forum.freecadweb.org/download/file.php?id=5954">crank_simul.fcstd</a>
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</p>
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<h3><span class="mw-headline" id="Script">Script</span></h3>
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<p>crank_simul.FCMacro
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</p>
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<pre>import FreeCAD as App, FreeCADGui as Gui, Part, time, sys, math, Draft, DraftGeomUtils
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from PySide import QtGui,QtCore
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class Animation(object):
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def __init__(self):
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App.Console.PrintMessage('init')
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App.ActiveDocument.recompute()
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self.timer = QtCore.QTimer()
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QtCore.QObject.connect(self.timer, QtCore.SIGNAL("timeout()"), self.my_update)
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self.timer.start(50)
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self.an = 0.1
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def my_update(self):
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string = '{0}'.format(self.an)
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self.an = self.an + 0.01 if self.an < (2 * math.pi) else 0.0
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angle = math.degrees(self.an)
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App.ActiveDocument.Sketch.setDatum(5,App.Units.Quantity(str(angle)+' deg'))
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App.ActiveDocument.recompute()
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p1 = App.ActiveDocument.Sketch.Shape.Vertexes[0].Point
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p2 = App.ActiveDocument.Sketch.Shape.Vertexes[1].Point
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conrodangle = math.degrees(Draft.DraftVecUtils.angle(App.Vector(1,0,0),(p1-p2))) - 90
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App.ActiveDocument.getObject("Cylinder").Placement = App.Placement(p1,App.Rotation(App.Vector(1,0,0),-90))
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App.ActiveDocument.getObject("Sketch001").Placement = App.Placement(p1,App.Rotation(App.Vector(0,0,1),conrodangle))
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def stop(self):
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self.timer.stop()
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animation = Animation() </pre>
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<h3><span class="mw-headline" id="Links">Links</span></h3>
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<p>The forum discussion <a rel="nofollow" class="external text" href="http://forum.freecadweb.org/viewtopic.php?f=24&t=6815&hilit=animation#p55092">Inline-four engine animation</a>
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</p><p>The blog <a rel="nofollow" class="external text" href="http://freecad-tutorial.blogspot.be/">freecad-tutorial.blogspot</a>
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</p>
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<div style="clear:both"></div>
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</div>
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</div>
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</div><div class="printfooter">
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Online version: "<a dir="ltr" href="https://www.freecadweb.org/wiki/index.php?title=Macro_crank_simul&oldid=239967">http://www.freecadweb.org/wiki/index.php?title=Macro_crank_simul&oldid=239967</a>"</div>
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<div id="catlinks" class="catlinks" data-mw="interface"></div><div class="visualClear"></div>
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</div>
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</div>
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<div id="mw-navigation">
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<h2>Navigation menu</h2>
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