Making (Materials option)
Overview
Once a product has been designed on a computer, the same digital information can drive the machines that cut, shape and build it. Computer-aided manufacture (CAM) is the use of computer-controlled machinery, laser cutters, CNC routers and mills, 3D printers and robot arms, to make products directly from a digital design. The model the designer drew becomes the instructions the machine follows, so what is designed is exactly what is made.
This note examines making with CAM in the resistant-materials context. It sets out the advantages of CAM, such as speed, accuracy, repeatability and the direct link from CAD, and weighs them against the disadvantages, including high cost, the loss of some manual skills and the consequences of a machine repeating a mistake perfectly. The aim is to let you argue clearly about when CAM is the right way to make a product and when it is not.
Objectives
- understand the advantages and disadvantages of using computer-aided manufacture (CAM) to make products.
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Lesson Evaluation
Congratulations on completing the lesson on Making (Materials option). Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- What does CAM stand for? A. Computer-Aided Modelling B. Computer-Aided Manufacture C. Computer-Assisted Measurement D. Computer-Analysed Materials Answer: B
- Which is an advantage of using CAM to make products? A. It is always cheaper than hand making for a single one-off B. It produces identical, accurate parts repeatedly and quickly from a CAD design C. It never requires any trained staff D. It cannot make complex shapes Answer: B
- Why can a fault in a CAM program be especially costly? A. The machine slows down to avoid the fault B. The machine repeats the same fault perfectly on every part, wasting a whole batch C. CAM machines cannot make mistakes D. The fault only affects the first part made Answer: B
- For which job is CAM most clearly the better choice than hand making? A. One simple plywood shelf B. A unique, simple wooden bowl C. 1,000 identical engraved acrylic keyrings D. A single rough garden stake Answer: C
- Which is a disadvantage of relying on CAM in a workshop? A. Parts become less accurate than hand making B. A breakdown or power cut can stop all production and waste material C. It is impossible to link CAM to CAD D. CAM can only make one part ever Answer: B
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