Scripted Parts: Ball Bearing - Part 2: Difference between revisions

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===Introduction===
⚫
Todo
This tutorial is meant as a beginner's introduction to creating parts with python scripts within FreeCAD.<br />
This tutorial will cover how to build a ball bearing with a workflow that consists of creating sketches and revolving them.<br />
The code will produce a new FreeCAD document with 12 shapes (Inner Ring, Outer Ring and 10 balls/spheres).<br />
It will look like this:<br />

[[Image:Tutorial_BallBearing01.jpg|400px]]


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===Workflow===
Todo
The workflow is more or less identical how you would create the part in part design workbench.<br />
Just some small differences.<br />
*Create a new empty document and make it the active document


*Set view to axometric
*Zoom to fit all


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===Making the groove===
Todo
Bla and blub ...


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===Notes===
Todo
Bla and blub ...


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===Links===
Todo
[[Scripted objects]]: The wiki page explaing the basics of scripting<br />
[[Topological data scripting]]: A tutorial for covering basics of scripting<br />
[[Scripted Parts: Ball Bearing - Part 1]]: Doing it with part primitives<br />
[http://linuxforanengineer.blogspot.de/2013/12/bearings-from-scripted-sketches.html Bearings from scripted sketches]: Base for this tutorial, thanks to JMG ...<br />


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===Code===
Todo
{{Code|code=
## Ball-bearing script
## 11.08.2016 by r-frank (BPLRFE/LearnFreeCAD on Youtube)
## based on ball bearing script by JMG
## (http://linuxforanengineer.blogspot.de/2013/12/bearings-from-scripted-sketches.html)

#needed for doing boolean operations
import Part
#needed for calculating the positions of the balls
import math
#needed for translation and rotation of objects
from FreeCAD import Base

#VALUES#
#(radius of shaft/inner radius of inner ring)
R1=15.0
#(outer radius of inner ring)
R2=25.0
#(inner radius of outer ring)
R3=30.0
#(outer radius of outer ring)
R4=40.0
#(thickness of bearing)
TH=15.0
#(number of balls)
NBall=10
#(radius of ball)
RBall=5.0
#(rounding radius for fillets)
RR=1
#first coordinate of center of ball
CBall=((R3-R2)/2)+R2
#second coordinate of center of ball
PBall=TH/2

#Create new document
App.newDocument("Unnamed")
App.setActiveDocument("Unnamed")
App.ActiveDocument=App.getDocument("Unnamed")
Gui.ActiveDocument=Gui.getDocument("Unnamed")

⚫
#Todo


#Make it pretty#
App.activeDocument().recompute()
Gui.activeDocument().activeView().viewAxometric()
Gui.SendMsgToActiveView("ViewFit")
}}


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Todo


</translate>
</translate>

Revision as of 08:35, 16 August 2016

Tutorial
Topic
Part Scripting - Ball Bearing #2
Level
Beginner
Time to complete
30 min
Authors
r-frank
FreeCAD version
0.16.6706
Example files
See also
None

Introduction

This tutorial is meant as a beginner's introduction to creating parts with python scripts within FreeCAD.
This tutorial will cover how to build a ball bearing with a workflow that consists of creating sketches and revolving them.
The code will produce a new FreeCAD document with 12 shapes (Inner Ring, Outer Ring and 10 balls/spheres).
It will look like this:

Workflow

The workflow is more or less identical how you would create the part in part design workbench.
Just some small differences.

  • Create a new empty document and make it the active document


  • Set view to axometric
  • Zoom to fit all

Making the groove

Bla and blub ...

Notes

Bla and blub ...

Links

Scripted objects: The wiki page explaing the basics of scripting
Topological data scripting: A tutorial for covering basics of scripting
Scripted Parts: Ball Bearing - Part 1: Doing it with part primitives
Bearings from scripted sketches: Base for this tutorial, thanks to JMG ...

Code

## Ball-bearing script
## 11.08.2016 by r-frank (BPLRFE/LearnFreeCAD on Youtube)
## based on ball bearing script by JMG
## (http://linuxforanengineer.blogspot.de/2013/12/bearings-from-scripted-sketches.html)

#needed for doing boolean operations
import Part
#needed for calculating the positions of the balls
import math
#needed for translation and rotation of objects
from FreeCAD import Base

#VALUES#
#(radius of shaft/inner radius of inner ring)
R1=15.0
#(outer radius of inner ring)
R2=25.0
#(inner radius of outer ring)
R3=30.0
#(outer radius of outer ring)
R4=40.0
#(thickness of bearing)
TH=15.0
#(number of balls)
NBall=10
#(radius of ball)
RBall=5.0
#(rounding radius for fillets)
RR=1
#first coordinate of center of ball
CBall=((R3-R2)/2)+R2
#second coordinate of center of ball
PBall=TH/2

#Create new document
App.newDocument("Unnamed")
App.setActiveDocument("Unnamed")
App.ActiveDocument=App.getDocument("Unnamed")
Gui.ActiveDocument=Gui.getDocument("Unnamed")

#Todo


#Make it pretty#
App.activeDocument().recompute()
Gui.activeDocument().activeView().viewAxometric()
Gui.SendMsgToActiveView("ViewFit")


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