CAD
Library of HPV's and parts
- In most workplaces where CAD is used, the task of drafting is
simplified by employing readily accessible, accurate drafted
drawings of components.
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- Component drawings are put together to make assembly drawings
of complete, useful items.
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- The IHPVA will hold or simplify access to 2D and 3D files of
common HPV / Bike components. This CAD library would greatly
simplify the task of designing bikes.
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- Draft Guidelines for CAD Library Drawings:
- Drawings to be in DXF R14 format
- Drawings to be drawn to a scale of 1 drawing unit = 1 mm
- Have a maximum of 2 layers on any drawings, 1 layer for
dimensions and one for the objects.
- Dimension in mm and leave dimensions as single, unexploded
entities.
- Keep dimensions to an absolute minimum and only show important
sizes. ie for wheel, OD and are axle width could be included.
- Drawing filenames should start with 2d or 3d depending on the
content of the drawing.
- Origin point of the drawing should be logical and "on the
centreline of the bike" wherever possible, ie for
wheels,handlebars, seats, seatposts.
- Manufacturers are welcome to submit links to their own
libraries of component drawings.
- Drawings should not reveal commercially sensitive details of a
specific manufacturer's components.
- Drawings may be of bike components or of complete components
which form the basis of an HPV conversion, ie Raleigh 20, mixte
frame ladies bike.
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- Steve
Nurse proposed these guidelines
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- Here are some example drawings from Steve:
- Here are some example .jpg drawings submitted
previously:
- Some submissions:
- A useful tool which can be used in conjunction with our
library is this collection of java applets that can generate DXF
files of a variety of bicycle configurations including short
wheelbase recumbents. Brent Curry's CAD software is located at
http://www.bikeforest.com/CAD
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- Also Peter Eland has used and references some free CAD
software at
http://www.eland.org.uk/pages/Misc/cadnotes.html
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