CAD system,Why do machine shops need?

Machine shops need a 3D CAD system because they can no longer spend time and incur costs in processing customer geometry, nor in creating tooling, programming CNC code, or iterating with customers. A 3D CAD system can more efficiently and cost-effectively provide:
Improved handling of part models – With a 3D CAD system, machine shops can import, repair, and work with a variety of design data. Part designers often attach metadata to 3D models to dimension features and establish geometric tolerances. With a CAD package, machinists can utilize this data to interrogate the part and assess its manufacturability. Improved handling of part models not only saves time but also enhances accuracy and reduces waste, scrap, and rework.
Automation of design changes – Design changes occur without fail, either because a change required by the designer – such as an engineering change order – or because the machine shop needs to address a production problem. In either case, a 3D CAD system automates the process of changing the model and re-programming the tool path in the CAM system, especially when the CAD system and the CAM package are fully integrated.
Using the SolidWorks 3D CAD system, toolmakers at Longmont Machining, Inc. can quickly get answers to questions.(Image courtesy of Longmont Machining, Inc.)Better communication of changes/ production issues – Whenever a machine shop has to make a design change to resolve a production issue – such as increasing the wall thickness of a part that is too thin for injectionmolding – a 3D CAD system makes it easier to communicate the reason for the change to the customer.