Development Team/CAD Team
Introduction
If you want to contribute CAD Designs to OSE, then join this team!
How to Join
You can start by posting a short text about yourself and your skills on the Introductions category of the discussion forum.
Then, please read the Team Culturing page and fill out the survey, as described there. Don't forget to add [[Category: CAD team]] to your survey page so that you get listed.
Units
We need to decide on a policy regarding units, not just what units the plans are stored in (which the computer can trivially convert), but rather whether the machines are built from materials size for standard or metric units (for example a 1/4 inch bolt verses the 6 mm bolt which are not the same size). Ideally, once a design is finalized we should be able to produce two, slightly different versions of it with one for each system. Then when starting a village somewhere you can choose to build all of one or the other, depending on what tools/parts are more readily available in that area.
Standardized Building Materials
In order to facilitate modular designs and make it easier for growing communities to bootstrap their development, we should try to develop a minimal list of "building blocks" out of which to build larger machines. Although different mechanical systems require differently sized components, we don't need continuous variation in every property. By limiting the number pieces we use in the machines we gain several advantages: sourcing parts is easier, buying more of fewer parts will likely get us better prices on parts, communities require fewer tools to be fully bootstrapped if there are fewer parts that need manufacturing processes. In addition to these benefits it would be nice for the project as a whole to have a good list of what everything costs to allow for easy cost calculations of different design choices.
Bolts
| Need | Standard Choice | Price (each) | Metric Choice | Price (each) |
|---|---|---|---|---|
| Small Bolt | 1/4-20 x 2" (grade 8) | $0.13 [1] | 6mm x 1.0 x 50mm | $0.26 [2] |
| Small Bolt (long) | ||||
| Med Bolt | ||||
| Med Bolt (long) | ||||
| Large Bolt | ||||
| Large Bolt (long) |
Angle Iron
| Need | Standard Choice | Price (each) | Metric Choice | Price (each) |
|---|---|---|---|---|
| Small | ||||
| Med | ||||
| Large | ||||
| Large (thick) |
Square Tubing
| Need | Standard Choice | Price (each) | Metric Choice | Price (each) |
|---|---|---|---|---|
| Small | ||||
| Med | ||||
| Large | ||||
| Large (thick) |
Pipe
| Need | Standard Choice | Price (each) | Metric Choice | Price (each) |
|---|---|---|---|---|
| Small | ||||
| Med | ||||
| Large | ||||
| Large (thick) |
Threaded Rod
| Need | Standard Choice | Price (each) | Metric Choice | Price (each) |
|---|---|---|---|---|
| Small (Fine thread) | ||||
| Small | ||||
| Large |
See also
- List of CAD team members
- List of Freely available CAD tools
- A page discussing various CAD topics
- Finite Element Analysis