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With reference to CNC machining, describe any three of the following: (i) Safety features on the machine; (ii) Canned cycle; (iii) G00; (iv) Tool park position. - Leaving Cert Engineering - Question c - 2007
Question c
With reference to CNC machining, describe any three of the following: (i) Safety features on the machine; (ii) Canned cycle; (iii) G00; (iv) Tool park position.
Worked Solution & Example Answer:With reference to CNC machining, describe any three of the following: (i) Safety features on the machine; (ii) Canned cycle; (iii) G00; (iv) Tool park position. - Leaving Cert Engineering - Question c - 2007
Step 1
Safety features on the machine;
Answer
CNC machines are equipped with several safety features to ensure safe operation. First, a large clear guard encloses the machining area, protecting operators from moving parts. Second, the machine will not run if the guard is not in place, which acts as a critical safety interlock. Additionally, there is an emergency stop button located on the front of the machine, allowing operators to quickly halt operations in case of emergencies. Finally, the program must have undergone a test run before actual machining commences, which helps prevent accidents due to programming errors.
Step 2
Canned cycle;
Answer
A canned cycle is a feature in CNC machining that allows operators to execute a series of repetitive operations using a single program block. This simplifies the programming process by encapsulating common machining tasks, such as drilling or tapping, into predefined commands. By using canned cycles, the machining process becomes more efficient, as it reduces the need for extensive programming and allows for quick adjustments to be made directly within the cycle.
Step 3
G00;
Answer
G00 is a command in CNC programming that instructs the machine to move rapidly to a specified position without engaging in any cutting operations. This code is essential for repositioning the machine's tool quickly and efficiently, minimizing the time spent moving from one operational point to another. During G00 operations, the machine prioritizes speed, facilitating faster transitions between different machining tasks.