WorksheetsCNC LAB
Total questions: 20
Worksheet time: 40mins
The spindle speed for a particular tool in a program is incorrect and you wish to reduce it. The kind of CNC word you must change is:
an F word
an S word
) a G word
a T word
You determine that a feedrate for a particular tool must be 5.0 inches per minute (or 5 millimeters per minute in the metric mode). The correct designation in the program would be:
F0.5
F5.0
S5.0
F0.005
You are running a proven program (one run before) for the first time in a new setup. You are cautiously allowing the first tool come into its approach position when you determine that the tool is not going where it is supposed to. It is most likely that:
the spindle speed is not correct
the program zero designation is not correct
the dry run switch should be turned on
the programmed coordinates are not correct
When coordinates going into a program are specified relative to the program zero point, it is called:
the incremental mode
the absolute mode
the rapid mode
the canned cycle mode
What mode switch position allows programs to be modified?
Jog
Auto
Edit
Zero return
What mode switch position allows a program to be run from within the CNC control?
Jog
Auto
Edit
Zero return
What mode switch position allows the activation of a single CNC command?
Jog
Edit
Auto
MDI (manual data Input)
What mode switch position allows you to send the machine to its reference (home) position?
Jog
Auto
Edit
Zero return
What mode switch position lets you move the machine axes manually?
Jog
Edit
Auto
Zero return
Which on/off switch works in conjunction with a slash code in the program?
Dry Run
Single Block
Optional Stop
Optional Block Skip/Block Delete
Which on/off switch works in conjunction with an M01 in the program?
Dry Run
Optional Stop
Optional Block Skip/Block Delete
Single Block
Which on/off switch makes the control activate one command in the program at a time and then stop?
Dry Run
Optional Stop
Optional Block Skip/Block Delete
Single Block
The Feed rate Override switch lets the operator control the machine’s movement rate during cutting commands
True
False
can't say
none of these
The button used to activate a CNC program is:
Reset
Cycle Start
Emergency Stop
Feed Hold
The button used to temporarily stop the CNC cycle is:
Reset
Emergency Stop
Cycle Start
Feed Hold
The button that will reactivate the CNC program after temporary stoppage is:
Reset
Emergency Stop
Cycle Start
Feed Hold
The button that will clear data in the look-ahead buffer after a temporary program stoppage is:
Reset
Cycle Start
Emergency Stop
Feed Hold
The button that will actually turn off the power to the machine tool is
Reset
Emergency Stop
Cycle Star
Feed Hold
The display screen mode that lets the operator actually see the CNC program is the:
Offset page
Position page
Program page
Program Check page
The display screen mode that lets the operator enter tooling related data is the:
Offset page
Program page
Position page
Program Check page
