CNC Part Programming 1

What is the purpose of NC part programming?

• To plan and document the sequence of processing steps to be performed on an NC machine

• To determine the specifications of the machine to be used

• To identify the plane of cutting

• To study relevant component drawings

What is the difference between modal and non-modal G codes?

• Modal G codes remain active until another G code from the same group is programmed into a block, while non-modal G codes must be programmed into a block when it is required

• Modal G codes must be programmed into a block when it is required, while non-modal G codes remain active until another G code from the same group is programmed into a block

• Modal G codes are only effective in the block in which it is specified, while non-modal G codes are effective until the end of the program

• Modal G codes are effective in the block in which it is specified, while non-modal G codes are only effective until the end of the program

What is the purpose of the G90 command in CNC part programming?

• To specify the spindle speed in rpm

• To change the way axis motion commands are interpreted

• To specify the cutter feed rates in inch per minute

• To return to the machine zero position on all axes

What is the function of a subprogram in CNC part programming?

• To cancel canned cycles

• To specify the spindle speed in rpm

• To define a series of commands which might be repeated several times in a program

• To specify the tool to be used

What is the purpose of CAD/CAM in NC part programming?

• To perform NC part programming without human assistance

• To simulate the part program off-line to verify its accuracy

• To divide the tasks between the programmer and the computer

• To manually enter the part geometry data and motion commands directly into the MCU

What is the purpose of the G81 code in CNC part programming?

• To specify the spindle speed in rpm

• To cancel canned cycles

• To return to the machine zero position on all axes

• To drill holes in a single drill stroke

What is the function of Mastercam in CNC part programming?

• To manually enter the part geometry data and motion commands directly into the MCU

• To perform NC part programming without human assistance

• To divide the tasks between the programmer and the computer

• To input the part geometry, workpiece orientation, material, type of operation, cutting tool, and cutting parameters

What is the purpose of the MDI in CNC part programming?

• To perform NC part programming without human assistance

• To simulate the part program off-line to verify its accuracy

• To divide the tasks between the programmer and the computer

• To manually enter the part geometry data and motion commands directly into the MCU

What is the purpose of the G00 code in CNC part programming?

• To control the final position of the tool and not concerned with the path that is followed in arriving at the final destination

• To return to the machine zero position on all axes

• To drill holes in a single drill stroke

• To specify the spindle speed in rpm

What is the purpose of the G40 code in CNC part programming?

• To return to the machine zero position on all axes

• To cancel tool nose radius compensation

• To specify the spindle speed in rpm

• To cancel canned cycles