CNC: Letter Addresses And Codes 150402d Moodle Flashcards
The letter at the beginning of a word, G, M, S?
Address
Identifies a specific sequence, O1234, O2222?
Program number
A single character?
Byte
Combination numbers and letters, g84, m04
Word
Identified by a semicolon
End of block
Identify the blocks relative position, N100, N150?
Sequence number
A group of words, N10 G03 M08 T01
Block
G00 is the command for a tool to move quickly from its current position to a new position. To do this properly, it is necessary to …
Program a path to avoid objects that may exist between these points
You are required to machine a 1.25 in diameter spot face on a casting. You have determined that a one second well at the end of the cycle will be sufficient. Which block is correct?
G82 X1.23 Y4.56 Z-.125 R.025 P1000 F3.5
P1000 Is the key here
The command for a reference point return, g-28, can be included at different times throughout the program. Several are listed below. One is inaccurate. Which one?
At the end of each cutting pass
After each tool has completed its task
Near the end of a program
To conduct a workpiece inspection
At the end of each cutting pass
When programming for a return to machine home, g28, the definition of an intermediate location is
A position, often away from the workpiece where the return to home begins
The best description of a secondary reference point is that it’s a location that
Has many of the attributes and benefits as machine home
M codes
Turn functions on and off, rather than prepare for them
Prior to engaging a workpiece, you will commonly see this miscellaneous code
M08
Why would it be most appropriate for a spindle orientation code m-19 to be used?
Prior to a tool change
In a swingarm tool change system,
The tool to be used next is best identified prior to a tool change command
Adjusting rotational speeds will have no effect on feed rates if you have used which of the following program codes
G94 feed per minute
The best time to use a block skip function would be when
It is desirable to Omit an optional part profile
A number of different workpiece locations can be designated as part 0 through the use of work shift commands. Which following statement is most accurate?
Workpiece shift is generally associated with locations in the xy-plane, but can also include the Z plane as well
Which code line would ensure the safest operation?
N100 G54 G00 X0 Y0
N120 G00 Z1.0
Which of the following words can perform the following three functions?
Eliminate chatter at bottom of a hole
Ensure the spindle has stopped before reversing
Ensure completion of miscellaneous functions
G04
It’s common to send the tool to machine home at the end of a program. Which block of information perform this operation in the safest and most efficient way?
N100 G00 G28 G91 X0 Y0
N120 Z0
N130 G90
