Embedded Files
Computer-aided Techniques
Computer-aided Techniques
3D CAD: the use of the extrude and revolve (with an offset axis) commands
3D modelling edits: shell, subtraction, fillet and chamfer
3D CAD constraints: mate, align and centre axis
a selection of 2D CAD commands from: line, circle, arc, copy, trim, chamfer, fillet and scale
application of light source, surface texture and materials in 3D CAD illustrations
If dimensions are given in a 3D CAD modelling question, you must refer to them in your answer.
Dimensions are critical to 3D modelling processes.
Sketch and annotate your answers for 3D CAD modelling questions. An example of good practice is splitting the answer box in half vertically; do a sketch on one side and a written response on the other. This approach usually gains more marks than an extended written response with no sketch.
For CAD questions, you must use the following terms when referring to creating a solid feature:
extrude
revolve
When referring to editing a solid feature or adding more detail, use the following 3D CAD terms in your responses:
fillet
chamfer
mirror
shell
extrude-subtract
When describing 3D CAD modelling techniques, good practice is to include the following steps in your answers:
Extrusion:
profile sketched or drawn on a work plane
extrude command
Revolve:
profile sketched or drawn on a work plane with a centre axis
revolve command
Past Paper Questions and Marking Instructions
Past Paper Questions and Marking Instructions
N5 GC CAD Techniques.pdfN5 GC CAD Techniques MIs.pdfPage updated
Report abuse