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Worksheets5.1 run a program
Total questions: 19
Worksheet time: 10mins
When the operator approaches the control pendant, what button should they press to show the current program......
MDI
MEM
EDIT
HAND JOG
The very first line of a CNC program is.....
The number of tools in the turret
The date the program was created
The program number or O number
Todays date
After the program number, there should be a list of comments made by the programmer. these will have brackets around them, does the machine read code with brackets?
Yes
No
In your cnc program, there will be a list of tools used in brackets. When running or proving your code you should read this and familiarise yourself if what tools are being used.
True
False
CNC machines move very fast, once you press cycle start you will have LOTS of time to react
True
False
Once the single block key is pressed, the operator will need to press cycle start to advance through each line of the code?
True
False
the G00 rapid motion command moves the cutting tool into position quickly. The G00 command has its own set of override keys on the control panel. these buttons are labelled 100%, 50%, 25% and 5%
True
False
The use of override keys allows the operator to change the default value of a program command. any time you run a program for the first time which override key should be pressed?
100%
25%
5%
50%
Just above the rapid override buttons are the spindle speed and feed override buttons. you should NEVER change these without permission?
True
False
The first thing a program will usually do is call in the first tool, the T-code defines which tool to use and a comment in brackets will describe the tool. you should always check the description is accurate of the tool being used?
False
True
Once a tool has been verified, you will press cycle start again as the tool is moving into the start position of the workpiece you will press the feed hold button. this will be the time for you to review the.....
The distance to go readout
G00 override buttons
The feed rate buttons
The time on the clock
Once you press feed hold, how would you access the distance to go screen?
Press offset button
Press position button
Program conversion button
Current command key
If the distance to go readout says 200mm and your tool is 5mm what should you do?
Leave it for next man to sort out
Change the tool
Call your supervisor
Continue, the programmer knows what to do
Once you have completed the first part, if you are satisfied the program is running fine, you can then.........
Turn off single block and set rapids to 100%
Reset all the distance to go readouts to zero
Adjust feed rate and spindle override speeds to 200%
Go for a coffee and give up
On all CNC machines, the operator should use both their eyes and ears while running production parts.
True
False
If during the day your machine starts to make loud noises, you may have a problem. What should you do?
Call your supervisor
Turn off the coolant
No concern just let the machine work through it
Change the rapid speed to a new setting
It is important to visually examine the part once finished. a visual change in the cut surfaces or "surface finish" it could be a machine or tooling issue?
True
False
An area to monitor is the spindle load meter on the screen. it is common for the load to increase over time due to......
The machine getting tired
Poor offset positions
Low air pressure
Tools wearing and getting dull
If the load meter increases rapidly, this may be a sign there is a problem. what should you do?
Let the machine run, these spikes in load are normal
Immediately alert your supervisor
Change the raw material
Call the maintenance department to check air pressure
