25 Cancel Key
N5X12.00Z
and then the cancel key is pressed, the address Z is erased and
N5Xl2.00 is displayed.
EOB Key-End of Block Key
This is the END-OF-BLOCK key. When pressed while in the MDI mode the EOB character (;) is inserted into the program at the cursor location.
Note: The (;) symbol is never part of the program manuscript. The control system will automatically show the EOB character, for every “Enter” key used on a keyboard.
Figure 26 End of Block Symbol Key
PART PROGRAM EDIT KEYS
These keys are used to enter new program data (Insert), to make program changes (Alter), or to delete program data in memory (Delete). They are used while editing programs.
Figure 27 Program Edit Keys
FUNCTION KEYS
These buttons correspond to particular display modes (active mode).
By pressing any one of these buttons, the display will be switched to the corresponding screen. Then the soft keys may be used to display the needed data.
•Press the POS key to display the Position Screen.
•Press the PROG key to display the program list screen.
•Press the OFFSET/SETTING key to display the screen used to set offsets or adjust parameter settings.
•Press the SYSTEM key to display the system screen.
•Press the MESSAGE key to display the message screen.
•Press the GRAPH key to display the graphics screen.
Figure 28 Function Keys
CURSOR
This symbol is in the form of a blinking dash on the display, which is located below the position of a particular address while in one of the Edit modes. On many controls, the cursor highlights the whole word, for example X7.777
Cursor Move Keys (Navigation Keys)
In order to navigate through the program, there are four keys used to move the cursor.
Figure 29 Cursor Move Keys
The right pointing arrow key is used to move the cursor to the right or in the forward direction. When this key is pressed, the cursor moves only one space each press of the button, in the forward direction.
The left pointing arrow key is used to move the cursor to the left or, in the reverse direction. Just as with the prior described case, when this key is pressed, the cursor moves only one space each press of the button, in the reverse direction.
The downward pointing arrow key is used to move the cursor downward through the program in the forward direction. When this key is pressed, the cursor moves one full line downward in the forward direction, each time.
The upward pointing arrow key is used to move the cursor upward through the program in the reverse direction. When this key is pressed, the cursor moves one full line upward in the reverse direction each time.
Page-UP/DOWN Keys
Usually the length of the program exceeds what the height of the screen will display. The CURSOR move keys can be used to scroll through the program. When you press and hold the CURSOR button with the down or up arrow, the cursor will move through the program line-by-line. A more effective method to move a large amount is to use the two PAGE keys. Using these keys will advance in the direction selected by the number of lines the screen can display. The last block of a given page becomes the first block of the next page. Use the PAGE button with the arrow pointing up to change pages in the opposite direction.
Figure 30 Page Keys
Example:
O0001
N1G50X7.777 Z7.777 S1000
N2T0100M39
N3G96S600M03
In the above example, with the CURSOR resting below N then pressing the CURSOR button three times with the right-pointing arrow causes the cursor to be located below the letter (address) G.
By pressing the CURSOR button (with the arrow pointing up) repeatedly, the prompt will move to the first word of program O, which corresponds to the upper limit of cursor movement. Another fast way to return to the program head is to press the RESET key.
By pressing the CURSOR button once, with the arrow pointing down, the cursor will move down one line. If the cursor must be moved over a few or many words, you need not press the button repeatedly. Just press and hold this button down; the cursor automatically jumps one word at a time in the given direction. The PAGE keys allow for scrolling through long programs more effectively.
OPERATIONS PERFORMED AT THE CNC CONTROL
The following explanations are for operations considered routine for operators of CNC machine tools and are given in their sequence of use.
Please note that the following procedures are specific to the type controller depicted here (Fanuc 16 or 18 series). The procedures for another type control may be similar. Be sure to consult the manufacturer manuals specific to your machine tool operation and control panel.
The Machine is Turned on and Homed (Machine Zero)
Turn on the main power switch, and then press the ON Power button on the controller. Most modern machine tools will automatically start-up in the HOME mode. This means that before any automatic or manual operation may begin, it will be required to Home the machine first.
If the Operation selection LED, HOME, is not lit, press it now.
Using the Axis/Direction keys, press the direction necessary to HOME the machine. Note that many machine tools will have LED’s for each axis that are lit to indicate when an axis is HOMED.
Figure 31 Actual Position (Absolute) Screen
At machine start-up, a common screen displayed is ACTUAL POSITION (ABSOLUTE). If it is not
