Programming Epson Robots ME 4135 – Fall 2012 Dr. R. Lindeke.
Geometry Control – Modifying and Relimiting; Using Axes and Transformation Ideas Chapter 2: 2.4 &...
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Transcript of Geometry Control – Modifying and Relimiting; Using Axes and Transformation Ideas Chapter 2: 2.4 &...
![Page 1: Geometry Control – Modifying and Relimiting; Using Axes and Transformation Ideas Chapter 2: 2.4 & 2.5 R. Lindeke IE 1225.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649d0d5503460f949e2a9c/html5/thumbnails/1.jpg)
Geometry Control – Modifying and Relimiting; Using Axes and Transformation Ideas
Chapter 2: 2.4 & 2.5
R. Lindeke
IE 1225
![Page 2: Geometry Control – Modifying and Relimiting; Using Axes and Transformation Ideas Chapter 2: 2.4 & 2.5 R. Lindeke IE 1225.](https://reader036.fdocuments.in/reader036/viewer/2022062518/56649d0d5503460f949e2a9c/html5/thumbnails/2.jpg)
Starts in 2.4 – Playing in Complex Geometries
Trimming under control Closing and Complementing Using the Tool Bars & your Mouse
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Set Millimeter as Units Grid: 100; 10 and Snap Off – Constraints On
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Constrain for size and then position: (25 x 50 to XY zero)
Set Length of the Top line and Left side Line – NOT offset!!!
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Pad to 100 mm!
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Edit the Sketch:
1st Remove Bottom Line horizontal Const. 2nd Remove Right Side Vertical Const. Finally, Remove Locational Constraints
(object is red! ---underconstrained) Select the Lower right point and drag it with
your mouse – to the “V-shape” This will automatically redefine your pad!
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Enter Sketcher on Right Face
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Draw and Constrain 2x30 mm dia. Circles
Then:
Draw 2 bi-tangent lines between them and Trim the circles between (these operations are not shown)
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The 2 intersecting lines were double “Broke”
Trim and Break in this tool bar!
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Further Modifications:
Sketch on the last Pad
“3D project” the edges of the arcs – then Isolate them from the part
After isolation: Close the Top one Complement the
lower – and connect the ends with a line
These sketches will form a 3rd pad away from the face!
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Make Sure the Bottom Arc and Line Close the lower edge & Pad to 10mm:
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Draw and Constrain 2 Rectangles – Double Click the Constraint ICON to string together constraints as needed!
Then Trim the Inside Lines and Fillet the ‘inside corners’
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1st Corner: Pick corner point, then Tab to Radius and type 8 (then tab again)! 2nd Corner: Select both lines then tab to radius, type 5 and tab!
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Apply Chamfers to outside corners – will be easy if rectangles dimensions were limited not lengths!
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Finally POCKET this ‘Rectangles’ Sketch “Up to Last”
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Lets spend a few minutes with Axes, Shaft, Mirror and their Kind – Tutorial 2.5
We are going to model a Wagon Wheel – the easy way!
We can develop simple geometries and revolve (or SHAFT) them about axes
Symmetrical shapes can be copied in many patterns – so why make them more than once!
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Draw and Constrain the Profile
Add offset Constraint (100) last! Then draw the vertical axis
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Might be quicker to Fillet the corners before shafting the sketch
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Choose Shaft and Fill in as below:
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Sketch on YZ plane – draw Axis and draw and Constrain Profile for Hub
Visualization Menu was hidden – I pulled it up from the bottom and clicked ‘Cut Part by Sketch Plane’
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Get Reference Elements Tools – we will be defining a new plane relative to original XY plane!
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Adding Working (Additional Sketch) Planes is the true power of 3D Cad design!
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We made it – lets use it – enter sketcher on this plane (see location in Part Tree)
Once in Sketcher Find and Drag out the “Transformation” toolbar
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One of the Ellipses – ready for “Rotated Array”
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Follow the Instruction in the message line! Object – Center or Axis (here the center point) - Angle
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Pad the Spokes to 11 mm – then Fillet all the edges of the spokes (all 16 of them!)
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Pick and Roll ‘til all “side faces” are Highlighted – all 16 of them too!
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Now for finishing the Hub Details – Using Symmetry and Mirror
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I selected all 3 sides of the Constrained Triangle – Then Mirror Icon – then the Axis!
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After Selecting each side of both Triangles – Then Mirror (1 instance) and the Center – Exit Sketcher and Pocket ‘Up to Last’
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Finished Product – done easily with Transformations and “Shafting Power”