Thinking of using CAD to improve product development? Here are some top tips that should help you on your way...
- Understand how to build a quality CAD model. The best computer models use minimal mathematical geometry to describe the form of the object. They are constructed in a way which is careful, planned and easy to amend - saving time further down the design / manufacturing process.
- Set construction tolerances from the outset. This will help with data transfer down the CAD pipeline and ensure smooth data exchange into systems such as FEA analysis or CNC machine-tool path-generation software.
- Create a test file. Use a test file to assess data compatibility when communicating with new suppliers - in order to better identify issues at the start of the programme.
- Buy the best computer hardware your budget can stretch to. System crashes created through incompatibility, lack of memory, CPU overload and stretched graphics cards can cost a lot of time. Check for hardware compatibility and particularly that the graphics card set up is right for the software. Unix is arguably the most stable, although a more expensive system.
- Don't believe the demo. Often application engineers have a favourite way of creating a demo model - which is rehearsed to make the system look easy and powerful. Ask the application engineer to work on a real problem so that you can get a better idea about the system's capabilities.
- Be organised. Some CAD models can consist of hundreds of associated assemblies. Try to plan how to build the CAD model and how it relates to other parts. Minimise the amount of information on screen by using layers, stages and grouping objects sensibly.
- Keep WIP files. WIP - Work In Progress files will help ensure that you do not lose the entire dataset if the model becomes corrupt. If you are the sort of person who forgets to save at regular intervals then get the system to auto save and keep a revision every 20 mouse clicks or so.
- Consider using a naming format similar to this: Project X-XXX/Part xyz/WIP 7/14_10_07
- Always backup. At the absolute minimum, backup onto multiple CDs using ISO 9660 format. Also consider taking them off site or using a fireproof safe. Consider using a central file server which is 'Raided' and backed up regularly. Have a log-in code policy and ensure that only appropriate personnel have administration rights to the system.
- Get expert help when necessary. Some really tricky parts or complex form development may require expert help to gain the correct result. It may also be necessary to use another system to achieve certain complex pieces of geometry.
- Re-evaluate your needs. The CAD marketplace is moving very quickly. The system that was best suited for your needs may now be being superseded. Keep up with current trends in trade journals and at CAD exhibitions and conferences.