Introduction Cnc

1. What is NC?
Numerical control program it’s a numeric point data in conjunction with specialized machine control commands and codes.

2. Howdid CNC come to be developed?


3. Input Devices
Central Proccesing Unit (CPU)
Data
Output devices
Data
Internal Memory
Data
Input Devices
CentralProccesing Unit (CPU)
Data
Output devices
Data
Internal Memory
Data
Draw a block diagram of a computer.4. Input media
Reader
Memory
Count Comparator
Servo -m otor
Working table
Feedback device
Machine Control Unit
Input mediaReader
Memory
Count Comparator
Servo -m otor
Working table
Feedback device
Machine Control Unit
Draw a block diagram of a CNC mill.5. Why are standards needed for CNC programming?
The standards are important because it provides simple programming instructions to enable a machine to carry on aparticular operation.

6. What is DNC?
Direct Numerical Control and distributed numerical control, describes communication to a machine tool from a remotecomputer
7. List the steps in the CNC process.
* Develop or obtain the part drawing
* Select which machine will perform the operations
*Decide the sequences and cutting paths directions
* Choose the tooling required.
* Do the math calculations for the program coordinates
* Calculatethe spindle speeds and feedrates required for the tooling and part materials.
* Write the CNC program
* Prepare setup sheet and tool lists.
* Verify...